Air contains \( 21 \% \) of oxygen by volume.
Calculate the volume of such air
required for the complete combustion
of \( 700 \mathrm{cm}^{3} \) of ethylene \( \left(C_{2} H_{4}\right) \) at \( 15^{\circ} \mathrm{C} \)
and 756 mm pressure.


Balance the following equation by ion electron method.
\( M n O_{4}^{2-}+H_{2} O \rightarrow M n O_{4}^{-}+O H^{-}+ \)
\( M n O_{2} \)


A coffee cup calorimeter initially contains 125 g of water at a
temperature of \( 24.2^{\circ} \) C. After adding of
\( 10.5 \mathrm{g} \) of \( K B r, \) the temperature
becomes \( 21.1^{\circ} \mathrm{C} \). The heat of solution
is:
A . \( 40 \mathrm{J} / \mathrm{g} \)
в. 117 J / \( g \)
c. \( 167.7 \mathrm{J} / \mathrm{g} \)
D. \( 420.05 \mathrm{J} / \mathrm{g} \)


\( \boldsymbol{A}=? \)
\( \boldsymbol{B}=\mathbf{?} \)
A \( . A=2 m, B=7 m \)
В \( . A=7 m, B=5 m \)
\( \mathbf{c} . A=3 m, B=6 m \)
D. \( A=2 m, B=5 m \)


In the given figure, \( P \) is the center of the
circle. The area and perimeter
respectively, of the figure are
A \( \cdot 3256 c m^{2}, 234.2 c m \)
B. \( 2492 \mathrm{cm}^{2}, 229.2 \mathrm{cm} \)
\( \mathbf{c} \cdot 2942 c m^{2}, 234.2 \mathrm{cm} \)
D. \( 3256 c m^{2}, 229.2 c m \)


Areca catechu and supari belongs to the family of
A. Poaceae
B. Palmae
c. Asteraceae
D. Scitamineae


A thin ring has mass \( 0.25 \mathrm{kg} \) and radius
\( 0.5 m . \) Its M.I. about an axis passing
through its centre and perpendicular to its plane is \( \ldots \)
\( \mathbf{A} \cdot 0.0265 g-c m^{2} \)
В. \( 0.0625 \mathrm{kg}-\mathrm{m}^{2} \)
c. \( 0.625 k g-m^{2} \)
D. \( 6.25 \mathrm{kg}-\mathrm{m}^{2} \)


The wire is found to vibrate in the third
harmonic. The maximum emf induced
is
\( A \)
B.
\[
\frac{3(A B) \omega}{k}
\]
\( c \)
\[
\frac{2(A B) \omega}{k}
\]
\( D \)
\[
\frac{(A B) \omega}{k}
\]
E. answer required


Stereoisomers have different:
A. molecular formula
B. structural formula
c. configuration
D. conformation


Solve \( \int\left(3 x^{2}-4\right) x d x, x \in R \)


When radiation emitted by a
radioactive substance is subjected to a magnetic field, alpha-particles describe a circle in the clockwise direction
A. beta and gamma particles will also be deflected in the same direction
B. gamma rays will be deflected to describe a circle in the counter clockwise direction but beta particles will not be deflected
C . gamma rays will not be deflected and beta rays will move in a circular path in the counter clockwise sense
D. beta and gamma rays will describe a circle in the counter clockwise sense


Thrombin occurs in vertebrates in
A. The blood and gives it red colour
B. The blood and is important for clotting
C. The liver and is important for bile secretion
D. The stomach and digests proteins


\( \int \cos \left\{2 \tan ^{-1} \sqrt{\frac{1-x}{1+x}}\right\} d x \) is equal to
A \( \cdot \frac{1}{8}\left(x^{2}-1\right)+k \)
B. \( \frac{1}{2} x^{2}+k \)
c. \( \frac{1}{2} x+k \)
D. none of these


Find the order of rotational symmetry of equilateral triangle.
A .2
B. 3
\( c \cdot 4 \)
D.


Ram gains 70 paise on Rs. \( 70 . \) Ram's gain percent is
A \( .0 .1 \% \)
B. 1\%
\( c .7 \% \)
D. \( 10 \% \)


\( \mathbf{f} \boldsymbol{x}, \boldsymbol{y}, \boldsymbol{z} \in \boldsymbol{R} \& \boldsymbol{\Delta}= \)
\( \left|\begin{array}{ccc}\boldsymbol{x} & \boldsymbol{x}+\boldsymbol{y} & \boldsymbol{x}+\boldsymbol{y}+\boldsymbol{z} \\ \mathbf{2} \boldsymbol{x} & \mathbf{5} \boldsymbol{x}+\mathbf{2} \boldsymbol{y} & \mathbf{7} \boldsymbol{x}+\mathbf{5} \boldsymbol{y}+\mathbf{2} z \\ \mathbf{3} \boldsymbol{x} & \mathbf{7} \boldsymbol{x}+\mathbf{3} \boldsymbol{y} & \mathbf{9} \boldsymbol{x}+\mathbf{7} \boldsymbol{y}+\mathbf{3} \boldsymbol{z}\end{array}\right|=-\mathbf{1} \mathbf{6} \)
then value of \( x \) is
A . -2
B. -3
\( c \cdot 2 \)
\( D \)


What are the postulates of JJ Thomson? What are his drawbacks?


A body of weight \( 20 \mathrm{N} \) is on a horizontal surface, minimum force applied to pull it when applied force makes an angle
\( 60^{0} \) with horizontal (angle of friction a \( = \)
\( \mathbf{3 0}^{0} \) ) is:
A. 20 N
B. \( 20 \sqrt{3} \) N
c. \( \frac{20}{\sqrt{3}} \mathrm{N} \)
D. zero


Acidic solution of \( F e^{2+} \) ion gives a
brown ring when it comes in contact
with \( N O_{3}^{-} \) ion. Complete the following reactions of this process.
\( \left[\boldsymbol{F} e\left(\boldsymbol{H}_{2} \boldsymbol{O}\right)_{6}\right]^{2+}+_{-}-_{-}-\ldots \rightarrow \)
\( +\boldsymbol{H}_{2} \boldsymbol{O} \)


You have \( R s, 2,400 \) in your account and
the interest rate is \( 5 \% \). After how many years would you earn \( R s 240 \) as
interest.


If \( \alpha \& \beta \) are the zeroes of quad polynomial \( \boldsymbol{x}^{2}-(\boldsymbol{k}+\boldsymbol{6}) \boldsymbol{x}+\boldsymbol{2}(\boldsymbol{2} \boldsymbol{k}-\boldsymbol{1}) \)
Find the value of \( k \) so that \( \alpha+\beta=\frac{1}{2} \alpha \beta \)


Which one of the following sets of ions represent the collection of isoelectronic
species?
A \( \cdot K^{+}, C a^{2+}, S c^{3+}, C l^{-} \)
B. \( N a^{+}, M g^{2+}, A l^{3+}, C l^{-} \)
C \( \cdot K^{+}, C l^{-}, M g^{2+}, S c^{3+} \)
D. \( N a^{+}, C a^{2+}, S c^{3+}, F^{-} \)


Which of the following is a functions of
the kidney?
A. Filtration of blood to remove wastes
B. Blood pressure regulation
c. pH regulation
D. Both A and C
E. All of the above


\( f(x)=x^{2}-3 x-4 \) find \( f(2) \)


Two events \( A \) and \( B \) are such that
\( \boldsymbol{P}(\boldsymbol{A})=\mathbf{0 . 2}, \boldsymbol{P}(\boldsymbol{B})=\mathbf{0 . 3} \) and \( \boldsymbol{P}(\boldsymbol{A} \)
\( \boldsymbol{B})=\mathbf{0 . 5 . F i n d} \boldsymbol{P}(\boldsymbol{A} \cap \boldsymbol{B}) \)
\( \mathbf{A} \cdot \mathbf{0} \)
B. 0.2
\( c .0 .3 \)
D. 0.5


Velocity of light in centimeter per nano second is


Among the following, is unstable in free space.
A. Electron
B. Proton
c. Neutron
D. \( \alpha \) -particle


mole of an ideal gas STP is subjected to a reversible adiabatic expansion to double its volume. The change in internal energy \( (\gamma=1.4) \)
A . 1169 J
B. 769 J
c. 1373 J
D. 969 J


Working of a pump is based on the
A. force of friction
B. atmospheric pressure
c. gravitational force
D. volume of fluid extracted


Stream line flow of a liquid at a given point.
A. Has the same magnitude
B. Has the same direction
c. Both a and \( b \)
D. None of these


An electron revolves along a circular
path of radius \( 20 \mathrm{cm} \) with constant
angular velocity 120 rads \( ^{-1} \) about an axis passing through the centre and perpendicular to the plane of the circle. If the external magnetic field is absent,
then the potential difference between the centre of the circle and a point on
the circumference of the circle is (Mass
of the electron \( \left.=9.1 \times 10^{-31} k g\right) \)
\( \mathbf{A} \cdot 3.691 \times 10^{-9} V \)
B . \( 1.638 \times 10^{-9} V \)
C \( .4 .278 \times 10^{-9} V \)
D . \( 2.347 \times 10^{-9} V \)


In the given reaction the underlined substance is:
\( \mathbf{6} \boldsymbol{N} \boldsymbol{H}_{4} \boldsymbol{O} \boldsymbol{H}+\boldsymbol{A} \boldsymbol{l}_{2}(\boldsymbol{O} \boldsymbol{H})_{3} \rightarrow \boldsymbol{2} \boldsymbol{A} \boldsymbol{l}(\boldsymbol{O} \boldsymbol{H})_{3} \)
A. aluminium sulphate
B. aluminium hydroxide
c. ammonium sulphate
D. ammonia


Explain the steps involved in the formation of root nodule.


Construct a triangle \( P Q R \) in which
\( Q R=4.8 c m, \angle Q=45^{\circ} \) and \( \angle R=55^{\circ} \)


Covalency of nitrogen in ammonium ion is:
A .2
B. 3
\( c \cdot 4 \)
\( D \)


Fill in the blanks:
(a) The planet which is farthest from the Sun is
(b) The planet which appears reddish in colour is
(c) A group of stars that appear to form a pattern in the sky is known as
(d) A celestial body that revolves around a planet is known as
(e) Shooting stars are actually not
(f) Asteroids are found between the
orbits of \( \quad \) and


If \( \angle D \cong \angle B \) and \( \angle B \cong \angle Q, \) then \( \angle D \cong \)
\( \angle Q \) is a \( ------ \) property of
congruence.
A. reflexive
B. transitive
c. symmetric
D. addition postulate


Arrange the following in decreasing order of acidic strength.
I. Benzoic acid
II. 4 -nitrobenzoic acid
III. 3,4 -dinitrobenzoic acid
IV. 4-methoxy benzoic acid
\( A \cdot|||>||>|>\mid V \)
B. |||>|| > IV > |
c. \( \|>\| \backslash>\mid v>1 \)
D. |> || > || > IV


Consider the plane \( S \) formed by the dipole axis and the axis of earth. If \( P \) be the point of intersection of the geographical and magnetic equators then the declination and dip angle at point \( P \) are
A. \( 0^{\circ}, 11.3^{\circ} \)
В. \( 11.3^{\circ}, 0^{\circ} \)
c. \( 11.3^{\circ}, 11.3^{\circ} \)
D. \( 0^{\circ}, 0^{\circ} \)


lodine cannot be deformed into a wire
because:
\( A \). it is a non-metal
B. it is brittle
c. both A and B
D. none of above


\( 1- \)phenyl\( -2- \)chloropropane on
treating with alc. \( K O H \) gives mainly:
A. 1-phenylpropene
B. 2-phenylpropene
c. 1 -phenylpropane-2-ol
D. 1-phenylpropan-1-ol


Cilliary muscles in the eye:
A. hold the eye lens in place
B. increase or decrease focal length of eye lens.
C. both (a) and (b)
D. none of these


A major constituent of vinegar is:
A. methanoic acid
B. benzoic acid
c. ethanoic acid
D. picric acid


f \( ^{n} C_{4},^{n} C_{5} \) and \( ^{n} C_{6} \) are in AP, then \( n \) is
A . 7 or 14
B. 7
c. 14
D. 14 or 21


The main constituent of biogas is:
A. Methane
B. Carbon dioxide
c. Hydrogen
D. Hydrogen sulphide


The wrong statement about \( N_{2} O \) is that:
A . it is nitrous oxide
B. it is least reactive oxide of nitrogen
c. it is not a linear molecule
D. it is known as laughing gas


Which of the following contributed to the success of Mendel?
A. His knowledge of biology
B. Qualitative analysis of data
c. observation of distinct inherited traits
D. consideration of one character at a time


Polyacrylamide gel is prepared by mixing acrylamide and at fixed
proportions.
A . glycol
B. bisacrylamide
c. hydrazine
D. none of the above


Find the sum to 90 terms of the series
\( \mathbf{5}+\mathbf{5 5}+\mathbf{5 5 5}+\cdots \cdots \)
A \( \frac{50}{81}\left[10^{90}-82\right] \)
в. \( \frac{50}{81}\left[10^{90}-83\right] \)
c. \( \frac{50}{81}\left[10^{90}-80\right] \)
D. \( \frac{50}{81}\left[10^{90}-90\right] \)


Diethyl ether reacts with \( P C l_{5} \) to form:
This question has multiple correct options
A. ethyl chloride
B. phosphorous oxy trichloride
c. 1,2 -dichloroethane
D. ethene


Phosphoric acid melts at \( 44^{\circ} \mathrm{C} \)
A. True
B. False


Assertion: The volume of 1 mole of an
ideal gas at 1 bar pressure at \( 25^{0} C \) is \( 24.78 \mathrm{L} \)
Reason: 1 bar \( =0.987 \) atm
A. Both Assertion and reason are correct and reason is correct explanation of Assertion
B. Both assertion and reason are correct but reason is not correct explanation of assertion
c. Assertion is correct but reason is incorrect
D. Assertion is incorrect but reason is correct


Two ball \( A \) and \( B \) of same mass \( (M) \)
and charges \( Q,-Q \) are suspended by
two strings of same length from two
different suspension points \( S_{1} \) and \( S_{2} \) if
\( S_{1} S_{2}=3 x \) and \( A B=x \) then show that
tension in the string is \( T=\frac{Q^{2} L}{4 \pi \in_{0} x^{3}} \) \( \tan \theta=\frac{Q^{2}}{4 \pi \in_{0} x^{2} M g} \)


The movement of colloidal particles, under applied electric current is know
as:
A. electrodialysis
B. dialysiss
c. electrophoresis
D. none of the above


Simplify : \( \frac{\boldsymbol{a}^{3}-\mathbf{2 7}}{\mathbf{5 a}^{2}-\mathbf{1 6 a}+\mathbf{3}} \div \)
\( \frac{\boldsymbol{a}^{2}+\mathbf{3} \boldsymbol{a}+\mathbf{9}}{\mathbf{2 5 a}^{2}-\mathbf{1}} \)


Offspring formed as a result of sexual reproduction exhibit more variations
because
A. Sexual reproduction is a lengthy process
B. Genetic material comes from two parents of the same species
c. Genetic material comes from two parents of different species
D. Genetic material comes from many parents


Find the distance between the following pairs of points:
(i) (2,3,5) and (4,3,1)
\( (i i)(-3,7,2) \) and ((2,4,-1)
(iii) (-1,3,-4) and (1,-3,4)
(iv) (2,-1,3) and (-2,1,3)


Following reaction is used to produce
\( B r_{2} \)
\( \mathbf{5} \boldsymbol{B r}^{-}+\boldsymbol{B r O}_{3}^{-}+\boldsymbol{6 H}^{+} \longrightarrow \boldsymbol{3} \boldsymbol{B r}_{2}+ \)
\( 3 H_{2} O \)
In this reaction:
\( \mathbf{A} \cdot B r^{-} \) disproportionates to \( B r_{2} \)
B. \( B r O_{3}^{-} \) disproportionates to \( B r_{2} \)
\( \mathrm{C} \cdot B r^{-} \) has been oxidised and \( B r O_{3}^{-} \) has been reduced
D. \( B r^{-} \) has been reduced and \( B r O_{3}^{-} \) has been oxidised


Identical constant forces push two
identical cars \( A \) and \( B \) continuously from a starting line to a finish line. The
cars move on a frictionless horizontal
surface. If car A is initially at rest and car-B is initially moving right with speed \( V \) o. Choose the correct
statement
c. Both cars has the same change in momentum
D. No enough information is given to decide


Which of the following is not
correctly matched?
A
B. Nylon-6,6 \( -\left[-N H\left(C H_{2}\right)_{6}-N H-C O-\left(C H_{2}\right)_{4}-\stackrel{\circ}{N}-\right]_{n}- \)
\( c \)
Terylene \( \left[\mathrm{ocH}_{2}-\mathrm{cH}_{2}-\left\|^{\mathrm{O}}\right\|_{\mathrm{n}}^{\mathrm{O}}\right]_{\mathrm{n}} \)
Datural Rubber \( \left.\left[-C H_{2}-C^{C H_{3}}\right]{ }=C H-C H_{2}-\right]_{n} \)


Write the differences between
physisorption and chemisorption with
respect to the following:
(i) specificity
(ii) temperature dependence
(iii) reversibility
(iv) enthalpy change


If the translatory kinetic energy of a rolling solid sphere is \( 35 J \), then its total kinetic energy is:
A . \( 42 J \)
B. \( 49 J \)
c. 56.5
D. \( 63 J \)


Graph shows the acceleration of \( 3 g \)
particle as an applied force moves it
from rest along \( \boldsymbol{x} \) - axis. The total work
done by the force on the particle by the
time the particle reaches \( \boldsymbol{x}=\mathbf{6 m}, \) is
equal to


n the triangle \( A B C, \angle A C E=130^{\circ} \)
\( \operatorname{segment} A D=A D=D C, \) then find
the measure of an \( \angle A B C \)


toppr 5
\( Q \) туре уоиг question
and \( B_{2} \) (dashed line). If \( B_{2} \) is larger thar
\( B_{1}, \) which of the following graphs shows
the correct variation of \( \mathrm{R} \) and \( \mathrm{T} \) in these
fields?


When do we consider a person to be
myopic?
A. He has poor near vision or blurred vision at all distances
B. He can not identify colors
C. He has poor night vision
D. He can see fine upto close distance, but distant objects are a blur


We consider the radiation emitted by the human body. Which of the following statements is true:
A. The radiation emitted is in the infrared region
B. The radiation is emitted only during the day
c. The radiation is emitted during the summers and absorbed during the winters
D. The radiation emitted lies in the ultraviolet region and hence is not visible


Excretory organs of urochordates are
A. Neural gland
B. Pyloric glandd
c. Nephrocytes
D. None of the above


A system consists of mass \( M \) and \( m \)
The centre of mass of the system is:
A. nearer to \( m \)
B. at the position of large mass.
c. nearer to \( M \)
D. at the middle


A young man has to hold a book at arm's length to be able to read it clearly. The defect of vision is:
A. astigmatism
B. myopia
c. presbyopia
D. hypermetropia


Initiate chemical change without themselves undergoing any permanent change
A . Reactants
B. Catalyst
c. Products
D. All of above


Phosgene and Phosphine both are poisonous.
If true enter 1 , else enter 0 .


For a planet revolving around the sun, when it is nearest to the sun (K.E. -
kinetic energy, P.E. - Potential energy)
A. K.E. is minimum and P.E. is maximum.
B. Both K.E. and P.E. are minimumm
c. K.E. is maximum. and P.E. is minimum
D. K.E. and P.E. are equal


Which cell is normally produced as a
direct result of meiosis?
A. A uterine cell having half the normal species number of chromosomes
B. An egg having the full species number of chromosomes.
C. A zygote having the full species number of chromosomes.
D. A sperm having half the normal species number of chromosomes.


The branch of science that studies
extraction, purification of metals and preparation of alloys is called:
A. metallurgy
B. solid state physics
c. particle physics
D. electrochemistry


\( \overline{\boldsymbol{x}}=(\mathbf{1}, \mathbf{1}, \mathbf{1}) \overline{\boldsymbol{y}}=(\mathbf{4}, \mathbf{3}, \mathbf{4}) \boldsymbol{a} \boldsymbol{n} \boldsymbol{d} \bar{z}= \)
\( (1, \alpha, \beta) \) are linearly dependent vectors
and \( |\bar{z}|=\sqrt{3}, \) then findaand \( \beta \)


The greatest value of the term independent for \( x \) in the expansion of
\( \left(x \sin p+x^{-1} \cos p\right)^{10}, p \in R, \) is
\( A \cdot 2^{5} \)
в. \( \frac{10 !}{(5 !)^{2}} \)
c. \( \frac{1}{2^{5}} \cdot \frac{10 !}{(5 !)^{2}} \)
D. None of the above


The boiling point of water in Kelvin scale
is:
A . \( 73.15 K \)
В. \( 173.15 K \)
c. \( 273.15 K \)
D. \( 373.15 K \)


If \( g \) is the inverse function of \( f \) and \( f^{\prime}(x)=\frac{1}{1+x^{n}}, \) then \( g^{\prime}(x) \) is equal to
A \( \cdot 1+[g(x)]^{n} \)
в. \( 1-g(x) \)
c. \( 1+g(x) \)
D \( \cdot-g(x)^{n} \)


Which of the following statements are true in the context of a compound Microscope?
(A) Each lens produces a virtual and inverted image
(B) The objective has a very short focal length
(C) The eyepiece is used as a simple magnifying glass
(D) The objective and eyepiece are convex and concave lenses respectively
\( A \cdot(A),(B) \) and \( (D) \)
B. (B) and (C)
\( c \cdot(A),(C) \) and \( (D) \)
D. (B) and (D)


An organic compound 'A' produces a gas with brisk effervescence when
sodium bicarbonate is added to it. The
compound 'A' contains same number of
carbons as in ethane. The compound 'A'
reacts with ethanol to form a sweet
smelling compound 'C' in presence of
conc. \( \boldsymbol{H}_{2} \boldsymbol{S} \boldsymbol{O}_{4} \) acid. Then the name of
compound \( A \) and the gas evolved is:
A. ethanoic acid; \( C O_{2} \)
B. methanoic acid; \( C O_{2} \)
C . ethanoic acid; \( H_{2} \)
D. methanoic acid; \( H_{2} \)


Assertion
In an ideal thermodynamically reversible process, the energy from work performed by or on the system would be maximized, and that from heat would
be minimized.
Reason
A reversible process is a process whose direction can be "reversed" by inducing infinitesimal changes to some property of the system via its surroundings, while not increasing entropy.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect


Q Type your question
in it. On testing, at the time of packing, it was noted that there are some faulty pieces in the packets. The data is as
below:

No. of faulty \( \quad \) Number of packets devices in a packet Nun s packe 0 300
1 If 100
2
3 30
4 20
f packets 500 Total number of
If one packet is drawn from the box, what
is the probability that all the four devices in the packet are without any fault?
A . 0.3
в. 0.75
c. 0.6
D. 0.95


Evaluate \( \int \frac{(x+\sqrt{1+x^{2}})^{15}}{\sqrt{1+x^{2}}} d x \)
A. \( \frac{(x+\sqrt{1+x^{2}})^{14}}{14}+C \)
B. \( \frac{(x+\sqrt{1+x^{2}})^{15}}{15}+C \)
c. \( \frac{(x+\sqrt{1+x^{2}})^{16}}{16}+C \)
D. \( \frac{(x+\sqrt{1+x^{2}})^{17}}{17}+C \)


A filament of Nostoc without its
mucilage sheath is called
A. Mycelium
B. Trichome
c. Hypha
D. colony


Show that the function \( |x| \) is not
differentiable at \( x=0 \)


How can you predict the following stages of a reaction by comparing the
value of \( K_{c} \) and \( Q_{c}, \) if no net reaction
occurs.
A. \( Q_{c} \)
в. \( Q_{c}>K_{c} \)
c. \( Q_{c}=K_{c} \)
D. None of the above


topp
Q Type your question
from rest for each situation represented
by the graphs, during which situation
was the cart moving fastest after 8
seconds?
4
B
\( c \)
\( D \)


Which is soluble in water:
A . Agc
B. AgBr
\( c \cdot A g \)
D. AgF


Which of the following statements
is/are true?
This question has multiple correct options
\( \mathbf{A} \cdot C H_{3}-C H_{2}-C H_{2}-I \) will react more readily than
\( \left(C H_{3}\right)_{2} C H I \) for \( S_{N} 2 \) reactions
B. \( C H_{3}-C H_{2}-C H_{2}-C l \) will react more readily than
\( C H_{3}-C H_{2}-C H_{2}-B r \) for \( S_{N} 2 \) reaction
\( \mathbf{c} \cdot C H_{3}-C H_{2}-C H_{2}-B r \) will react more readily than
\( \left(C H_{3}\right)_{3} C-C H_{2}-B r \) for \( S_{N} 2 \) reactions
D. \( C H_{3}-O-C_{6} H_{4}-C H_{2} B r \) will react more readily
than \( N O_{2}-C_{6} H_{5}-C H_{2}-B r \) for \( S_{N} 2 \) reaction


Define sexual reproduction.


The answer to this question is a single digit integer, ranging from 0 to 9
The van't Hoff factor for aqueous
solution of \( C u S O_{4} \cdot 5 H_{2} O \) will be


A particle rotates along a circle of radius \( R=\sqrt{2} \mathrm{m} \) with an angular acceleration \( \boldsymbol{\alpha}=\frac{\boldsymbol{\pi}}{\boldsymbol{4}} \boldsymbol{r} \boldsymbol{a} \boldsymbol{d} / \boldsymbol{s}^{2} \) starting
from rest. Calculate the magnitude of average velocity of the particle over the time it rotates a quarter circle.


Gonadotrophic hormones are produced
in the
A. Posterior part of thyroid
B. Adrenal cortex
c. Adenohypophysis of pituitary
D. Interstitial cells of testis


The hybridisation of carbon in diamond, graphite and acetylene is:
B. \( s p, s p^{2}, s p^{3} \)
\( \mathbf{c} \cdot s p^{3}, s p^{2}, s p \)
\( \mathbf{D} \cdot s p^{2}, s p^{3}, s p \)


Study the following graph carefully and
answer the question given. In which of the following pairs of companies the difference between
average productions for the three years is maximum?
A. E and
B. D and C
\( c \). E and \( c \)
D. A and E


Which of the following contain elements in the solid, liquid and gas phases at STP?
A. Halogens
B. Alkali metals
c. Alkaline earth metals
D. Noble gases
E. Lanthanides


Find \( \frac{d y}{d x} \) of \( a x+b y^{2}=\cos y \)


\( x- \) rays of wavelength \( \lambda \) falls on a
photosensitive surface emitting electrons.Assuming that the work
function of the surface can be
neglected, prove that the de Broglie wavelength of electrons emitted will be \( \sqrt{\frac{h \lambda}{2 m c}} \)


The relation 'is a factor of on the set of
natural numbers is
not
A. reflective
B. symmetric
c. anti symmetric
D. transitive


A child who inherits an Y chromosome
from father will be a girl.
A. True
B. False


The image of a real object in a plane
mirror is always:
A. Virtual
B. Erect
c. Laterally inverted with respect to the object
D. All of these


Which of the following is the cube of odd natural number?
A .32,768
B. 4,096
c. 6,859
D. 1,728


Find the direction angle of the vector \( \boldsymbol{v}=\mathbf{2}\left(\cos \mathbf{3 0}^{o} \hat{\boldsymbol{i}}+\sin \mathbf{3 0}^{\boldsymbol{o}} \hat{\boldsymbol{j}}\right) \)
A \( .90^{\circ} \)
B. \( 60^{\circ} \)
\( c \cdot 30^{\circ} \)
D. \( 0^{\circ} \)


What is the relation between \( _{8} X^{16} \) and
\( \mathbf{8} \boldsymbol{X}^{\mathbf{1 7}} \mathbf{?} \)
A. Isotopes
B. Isobars
c. Isotones
D. Isoelectronics


Assertion
An object falling from a great height may reach a steady terminal velocity.
Reason
The viscous force on the body is responsible for this steady terminal velocity.
A. Statement I is True and Statement II is True and is a correct explanation of statement
B. Statement lis True and Statement II is True but not a correct explanation of Statement!
c. statement lis True and Statement II is False
D. Statement lis False and Statement II is True


Multiple Correct Answers Type Which of the following pairs has/have the same dimensions?
This question has multiple correct options
A. Reynold number and coefficient of friction
B. Curie and frequency of light wave
c. Latent heat and gravitational potential
D. Planck's constant and torque


A man travels \( 1^{s t} 50 \mathrm{km} \) at \( 25 \mathrm{km} / \mathrm{hr} \)
next \( 40 \mathrm{km} \) with \( 20 \mathrm{km} / \mathrm{hr} \) and then 90
\( \mathrm{km} \) at \( 15 \mathrm{km} / \mathrm{hr} \) Then find his average speed for the whole journey (in \( \mathrm{km} / \mathrm{hr}) \)


A couple of dice rolled. What is the
empirical probability of getting the sum
as \( 5 ? \)
\( A \cdot \frac{3}{2} \)
B. \( \frac{1}{9} \)
\( c \cdot \frac{5}{2} \)
D. \( \frac{7}{2} \)


The function of quick lime mixture is to:
A. Absorb moisture present in sodalime
B. increase the efficiency of soda lime
C. Increase the pH of sodalime
D. Take part in reaction with NaOH


Q Type your question
acceleration. As the object moves, the
group measures several quantities about the object's motion. As part of their data analysis, the group plots pairs of quantities in an attempts to understand relationships between their
measurements. In addition to plotting quantities that they directly measured, the group also plots manipulated versions of their measured quantities. The group is ultimately able to describe several linear relationship between
measured and manipulated quantities because several of the plots show
straight-line trends. Three of the pairs of quantities listed below yield a straight-
line graph for the group when plotted against each other. Which one of the following option does NOT yield a straight-line graph when plotted?
A. Time and Speed
B. Displacement and Speed \( ^{2} \)
c. \( \quad \) Time and Displacement
D. speed and Time \( ^{2} \)


A force-time graph for a linear motion is
shown in figure. The linear momentum
gained between oand 6 second is
\( A \cdot 2 N s \)
3. 4 Ns
\( c \cdot 6 N s \)
D. zero


If \( a x^{2}+b x+6=0 \) does not have two
distinct real roots, where \( \boldsymbol{a} \in \boldsymbol{R}, \boldsymbol{b} \in \boldsymbol{R} \)
then the least value of \( 3 a+b \) is
A .4
B. - 1
\( c .1 \)
D. - 2


Prove the following Identities \( \frac{\tan \alpha+\tan \beta}{\cot \alpha+\cot \beta}=\tan \alpha \tan \beta \)


\( \operatorname{Given} \overrightarrow{\boldsymbol{F}}=(4 \hat{\boldsymbol{i}}+10 \hat{\boldsymbol{j}}) \) and \( \overrightarrow{\boldsymbol{r}}=(5 \hat{\boldsymbol{i}}- \)
\( 3 \widehat{j}) . \) Then torque \( \tau \) is :
A. \( -62 \hat{j} \)
В. \( 62 \bar{k} \)
\( c .48 \hat{i} \)
\( \mathbf{D} \cdot-48 \widehat{k} \)


Using Pt electrodes same quantity of electricity is passed in \( \mathbf{0 . 0 3} M A I C I_{3}, 0.01 M A I C I_{3}, 0.01 M A g \)
solutions. If 0.36 g silver is deposited what is the mass of Al deposited in two
\( A I C I_{3} \) solutions and volume of \( O_{2} \)
evolved at STP in NaOH solution?


If the boiling point of ethanol (molecular
weight -46 ) is \( 78^{\circ} C, \) what is the boiling point of diethyl ether (molecular weight=74)?
\( \mathbf{A} \cdot 100^{\circ} C \)
B . \( 70^{\circ} \mathrm{C} \)
\( \mathbf{c} \cdot 86^{\circ} C \)
D. \( 34^{\circ} C \)


The maximum displacement of a particle executing SHM from its mean position is \( 2 \mathrm{cm} \) and its time period is 1
s. The equation of its displacement will be
A . \( x=2 \sin 4 \pi t \)
B. \( x=2 \sin 2 \pi t \)
c. \( x=\sin 2 \pi t \)
D. \( x=4 \sin 2 \pi t \)


What is the \( Y \) - intercept for the straight line \( 2 x-3 y=5 ? \)
A \( \cdot \frac{2}{5} \)
в. \( -\frac{5}{3} \)
c. \( -\frac{5}{2} \)
D. \( \frac{1}{2} \)


Which of the following functional groups constitutes the formation of
detergent?
\( A \cdot S O_{3} N a \)
в. \( C O O N a \)
c. СООН
D. \( O H \)


Sam invested a certain amount of
money and got back an amount of Rs.
5000. If the bank paid an interest of Rs. \( 2700, \) find the amount Sam invested
A. 1300
в. 2300
c. 4300
D. 3300


f \( i=0.25 \) amp. in the fig the value of \( R \)
is :-
\( A \cdot 48 \Omega \)
в. \( 12 \Omega \)
c. \( 120 \Omega \)
D. \( 42 \Omega \)


When stearic acid \( \left(C_{18} H_{36} O_{2}\right) \) is added to water, its molecules collect at the
surface and form a monolayer. The cross-sectional area of each stearic
acid molecule is \( 0.21 n m^{2} . \) If \( 1.4 \times \)
\( 10^{-4} g \) of stearic acid is needed to form
a monolayer over water in a dish of diameter \( 20 \mathrm{cm} . \) (The area of the circle
of radius \( r \) is \( \left(\pi r^{2}\right), \) then what is
equivalent of \( 1 g H \) in amu for this value
of Avogadro's number?
A \( \cdot 1.66 \times 10^{-24} g \)
B . \( 3.33 \times 10^{-24} g \)
c. \( 2.5 \times 10^{-24} g \)
D. \( 1 \times 10^{-23} g \)


Identify the compounds \( A, B, C, D, E \)
and \( F \)


In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants is
doubled then the equilibrium constant will :
A. also be doubled
B. be halved
c. become one-fourth
D. remain the same


A letter is known to have come either
from \( \boldsymbol{T} \boldsymbol{A} \boldsymbol{T} \boldsymbol{A} \boldsymbol{N} \boldsymbol{A} \boldsymbol{G} \boldsymbol{A} \boldsymbol{R} \) or \( \boldsymbol{C A L} \boldsymbol{C U T T A} \)
On the envelope just two consecutive
letters \( T A \) are visible. What is the
probability that the letter came from
CALCUTTA?
\( A \cdot \frac{4}{11} \)
B. \( \frac{7}{11} \)
\( c \cdot \frac{2}{11} \)
D. None of these


Which one of the following figures has only one line of symmetry?
A. Rhombus
B. Rectangle
c. Isosceles trapezium
D. Parallelogram


\( \int \frac{x^{3}-x^{2}+x-1}{x-1} d x \)


If \( p \) is the length of the perpendicular from the origin to the line \( \frac{x}{a}+\frac{y}{b}=1 \)
then which of the following is true?
A \( \cdot \frac{1}{a^{2}}+\frac{1}{b^{2}}+\frac{1}{p^{2}}=0 \)
B . \( a^{2}+b^{2}-p^{2}=0 \)
c. \( \frac{1}{a^{2}}-\frac{1}{b^{2}}=\frac{1}{p^{2}} \)
D. \( \frac{1}{a^{2}}+\frac{1}{b^{2}}-\frac{1}{p^{2}}=0 \)


The distillation technique most suited for separating glycerol from spent-lye in the soap industry is :
A. fractional distillation
B. steam distillation
c. distillation under reduced pressure
D. simple distillation


\( A \) is known to speak truth 3 times out of
5 times. He throws a dice and reports
that it is a one. Find the probability that it is actually one.


Solve the equation \( |z|=z+1+2 i \)
A \( \cdot \frac{3}{2}+2 i \)
в. \( \frac{3}{2}-i \)
c. \( \frac{3}{2}+i \)
D. \( \frac{3}{2}-2 i \)


The linear magnification for a mirror is the ratio of the size of the image to the size of the object, and is denoted by \( \mathrm{m} \) Then \( m \) is equal to (symbols have their usual meanings).
A. \( \frac{u f}{u-f} \)
B. \( \frac{u f}{u+f} \)
c. \( \frac{f}{u-f} \)
D. None of these


The wire used in the arrangement shown in the figure has a resistance of \( r \Omega \) per metre. The equivalent resistance
between points \( A \) and \( B \) is:
\( ^{A} \cdot\left(\frac{6}{11}\right)^{r} \)
в. \( \frac{2 \pi r}{(\pi+1)} \)
c. \( \frac{6 \pi r}{(16+3 \pi)} \)
D. \( \frac{3 \pi r}{(10+3 \pi)} \)


Which of the following statement is true about resonance.
(A) Resonance is an intramolecular
process.
A. True
B. False


In the figure \( 1, \) find the area of the
parallelogram


If \( f_{0}=5 c m, \lambda=600 A^{0}, a=1 \mathrm{cm} \) for \( \mathrm{a} \)
microscope, then what will be its resolving power
A \( .11 .9 \times 10^{5} / m \)
B . \( 10.9 \times 10^{5} / m \)
c. \( 10.9 \times 10^{4} / m \)
D. \( 10.9 \times 10^{3} / m \)


What is the relationship between an electric current and a magnetic field?


A freshly prepared sample of a radioisotopes of half-life \( 1386 s \) has
activity \( 10^{3} \) disintegrations per second.
Given that \( \ln 2=0.693 \), the fraction of the initial number of nuclei (expressed in nearest percentage) that will decay
in the first \( 80 s \) after preparation of the sample is


Oxygen is a neutral gas which supports combustion.
A . True
B. False


Choose the wrong option regarding
miniature circuit breaker (MCB)?
A. MCB contains a metal which melts when the current passing through it exceeds a certain value and hence opens the circuit
B. Quick restoration of an MCB is possible just by switching on the operation when a breakdown occurs due to current overload
C. MCB switchess off the circuit automatically when the current passing through it exceeds a certain value
D. None of the above


The degree of dissociation of
\( C a\left(N O_{3}\right)_{2} \) in a dilute aqueous solution containing 7 gm of the salt per 100 gm
of water at \( 100^{\circ} \mathrm{C} \) is 70 per. If the vapour
pressure of water at \( 100^{\circ} \mathrm{C} \) is \( 760 \mathrm{mm} \)
Calculate the vapour pressure of the solution.
A. \( 373.12 \mathrm{mm} / \mathrm{Hg} \)
в. \( 524.89 \mathrm{mm} / \mathrm{Hg} \)
\( \mathbf{c} .746 .24 \mathrm{mm} / \mathrm{Hg} \)
D. \( 1049.6 \mathrm{mm} / \mathrm{Hg} \)


Where \( d \) is width of the strips. Fringe visibility is defined as
\( ^{A} \cdot \frac{I_{m a x}-I_{m i n}}{I_{m a x}+I_{m i n}} \)
B. \( \frac{I_{\max }+I_{\min }}{I_{\max }-I_{\min }} \)
c. \( \frac{I_{\max }-I_{\min }}{I_{\max }} \)
D. \( \frac{I_{\max }+I_{\min }}{I_{\max }+I_{\min }} \)


The local minimum value of the
function \( f^{\prime} \) given by \( f(x)=3+|x|, x \epsilon R \)
is.
\( A \cdot 3 \)
B.
\( c \cdot-1 \)
D.


If for \( \boldsymbol{x} \boldsymbol{\epsilon}\left(\mathbf{0}, \frac{\mathbf{1}}{\mathbf{4}}\right), \) the derivative of
\( \tan ^{-1}\left(\frac{6 x \sqrt{x}}{1-9 x^{3}}\right) \) is \( \sqrt{x} \cdot g(x), \) then
\( g(x) \) equals.
A \( \cdot \frac{3}{1+9 x^{3}} \)
в. \( \frac{9}{1+9 x^{3}} \)
c. \( \frac{3 x \sqrt{x}}{1-9 x^{3}} \)
D. \( \frac{3 x}{1-9 x^{3}} \)


The incorrect statement(s) about the
following two compound \( I \) and \( I I \)
is/are:

This question has multiple correct options
A. \( (I I) \) is more acidic than \( (I) \)
B. the resonance effect of phenyl ring with - cooH group is more in \( (I I) \) than in \( (I) \)
C. \( (I I) \) is weaker acid than \( (I) \) because of electron releasing inductive effect of tertiary - butyl group
D. the positive charge of carboxylate anions of \( (I) \) is more delocalized in the benzene ring than the \( (I I) \) compound


Compounds of nitrogen, phosphorus and sulphur such as ammonia, phosphoric acid and sulphuric acid are used in fertiliser industry.
Describe contact process for the manufacture of sulphuric acid?


saturated solution of \( A g C l \) then which
of the following plot is correct?
\( A \)
B.
\( c \)
\( D \)


The blind sac body plan is applicable to members of .......... of kingdom Animalia
A. Porifera
B. Annelida and Arthropoda
c. Cnidaria and Platyhelminthes
D. None of the above


\( \boldsymbol{H} \boldsymbol{P} \boldsymbol{O}_{4}^{2-}+\boldsymbol{H}_{2} \boldsymbol{O} \rightleftharpoons \boldsymbol{H}_{3} \boldsymbol{O}^{+}+\boldsymbol{P} \boldsymbol{O}_{4}^{3-} \)
In the equation above, which compounds are Bronsted bases?
\( \mathbf{A} \cdot H P O_{4}^{3-} \) and \( H_{2} O \)
B. \( H_{2} O \) and \( P O_{4}^{3-} \)
\( \mathrm{c} \cdot H_{3} O^{+} \) and \( H_{2} \mathrm{O} \)
D. \( H P O_{4}^{2-} \) and \( P O_{4}^{3-} \)


Which one of the following product is formed during glycolysis of glucose?
A. Pyruvic acid
B. Carbon dioxide
c. citric acid
D. Ethanol


An triangle \( A B C, \) with two base angles
\( 60^{\circ} \) and \( 75^{\circ} \) then find the remaining
angle


Choose the correct statement:
A. Integrated circuits are less efficient in performance at all voltages.
B. Integrated circuits are more efficient in performance at low voltages.
C. Integrated circuits are less efficient in performance at high voltages.
D. Performance of an integrated circuit is independent of the magnitude of applied voltage.


Evaluate \( \int_{0}^{2 / 3} \frac{d x}{\left(4+9 x^{2}\right)} \)


Arrange the following compounds in increasing order of boiling point
Propan \( -1- \) ol, butan -1 -ol, butan - 2 - ol
pentan -1 -ol
A. Propan-1- ol, butan-2 - ol, butan-1 - ol, pentan-1-ol
B. Propan-1- ol, butan-1 - ol, butan - 2 - -이, pentan-1 -ol
c. Pentan-1- ol, butan-2 - -ol, butan-1 - ol, propan-1-ol
D. Pentan - 1- ol, butan-1 - ol, butan - 2- ol, propan-1 -ol


The ratio of shearing stress to the shearing strain is defined as
A. Young's modulus
B. bulk modulus
c. shear modulus
D. compressibility


\( \ln \)
S.I. system, the value of \( \varepsilon_{0} \) is:
\( \mathbf{A} \cdot 1 C^{2} N^{-1} m^{-1} \)
B \( \cdot 9 \times 10^{9} C^{2} N^{-1} m^{-2} \)
C \( \cdot \frac{1}{9 \times 10^{9}} C^{2} N^{-1} m^{-2} \)
D. \( \frac{1}{4 \pi \times 9 \times 10^{9}} C^{2} N^{-1} m^{-2} \)


The survival of aquatic life in river
becomes difficult because:
A. when acid rain flows into the river, it lowers the pH of the river water
B. when acid rain flows into the river, it graters the pH of the river water
C. when acid rain flows into the river, it does not make any change in the river water
D. none of the above


3.2 moles of hydrogen iodide were heated in a sealed bulb at \( 444^{0} C \) till the
equilibrium state was reached. Its degree of dissociation at this temperature was found to be \( 22 \% \). The
number of moles of hydrogen iodide present at equilibrium are:
A .2 .496
B. 1.87
c. 2
D. 4


A conducting rod of length Lis falling with velocity \( V \) in a uniform horizontal magnetic field B normal to the rod. The induced emf between the ends the rod
will be :
\( A \cdot 2 B V l \)
B. zero
c. вlv
D. \( \frac{B V l}{2} \)


The focal length of a biconvex lens of refractive index \( \frac{3}{2} \) is \( 40 \mathrm{cm} . \) When immersed in a liquid of refractive index \( \frac{4}{3} \) its focal length in meters will be :
A . 160
B. 16
\( c .1 .6 \)
D. 0.8


Modern evolutionary theory consists of the concepts of Darwin modified by knowledge concerning
A. Population statistics
B. Mendel's law
c. The idea of the survival of the fittest
D. competition


Diagrammatically indicate the location of various endocrine glands in our body


If \( P(n) \) be the statement \( n(n+1), n \in \)
\( N \) is even, then
A \( . P(2) \) is true
B. \( P(3) \) is true
c. \( P(4) \) is true
D. all of the above


The radius of a sphere is \( 10 \mathrm{cm} \). If the radius is increased by \( 1 \mathrm{cm} \), then prove that volume fo the sphere is increased by \( 33.1 \% \)


Which of the following is not related to light perception?
A. Choroid
B. Rhodopsin
c. Lens
D. Perilymph


If the current in the toroidal solenoid
increases uniformly from zero to \( 6.0 A \) in \( 3.0 \mu s . \) Self inductance of the toroidal
solenoid is \( 40 \mu H . \) The magnitude of self induced emf is :
A . \( 80 V \)
B. \( 160 V \)
\( c \cdot 24 V \)
D. \( 48 \mathrm{V} \)


Find the maximum and minimum
values, if any, without using derivatives of the following function. \( f(x)=16 x^{2}-16 x+28 \) on \( R \)


Cube of odd natural number is
number
A . odd
B. even
c. negative
D. prime


A bullet is fired at a target with a velocity \( 80 \mathrm{m} / \mathrm{s} \) and penetrates \( 50 \mathrm{cm} \) into it. If this bullet were fired into a
target \( 25 \mathrm{cm} \) thick with equal velocity, with what velocity would it emerge, supposing the resistance to be uniform
and the same in both the cases?
A. \( \sqrt{80} \mathrm{m} / \mathrm{s} \)
в. \( \frac{40}{\sqrt{2}} m / s \)
c. \( 40 m / s \)
D. \( 40 \sqrt{2} \mathrm{m} / \mathrm{s} \)


What will be the major product when 2 -
amino propane is treated with nitrous
acid?
A. \( 1- \) Propanol
B . \( 2- \) Propanol
c. Propene
D. Cyclopropane


Which of the following process is not responsible for the presence of electric charge on the sol particles?
A. Electron capture by sol particles
B. Adsorption of ionic species from solution
C. Formation of Helmholtz electrical double layer
D. Absorption of ionic species from solution


Differentiate the following functions
with respect to \( \boldsymbol{x} \) \( \sin ^{-1}\left\{\frac{\sin x+\cos x}{\sqrt{2}}\right\}, \frac{\pi}{4}<x<\frac{3 \pi}{4} \)


Which element among the Lanthanides has the smallest atomic radius?
A. Cerium
B. Lutetium
c. Europium
D. Gadolinium.


What is the correct name of \( I F_{7} ? \)
A. Iron heptafluoride
B. lodine heptafluoride
c. lodine septafluoride
D. Iron (IV) septafluoride


Find the intervals in which the following functions are increasing or decreasing \( f(x)=10-6 x-2 x^{2} \)


n which of the following cases the pairs of triangles are similar? Write the similarity criterion used by you for answering the question and also write the pairs of similar triangles in
the symbolic form


If \( g \) is the acceleration due to gravity on
the Earth' surface, find the gain in
potential energy of a body of mass \( m \) when taken from the surface of Earth at
a height equal to the radius \( R \) of the
Earth.


Write the middle terms in the
expansion of \( \left(\frac{3 x}{7}-2 y\right)^{10} \)


How many triangles can be drawn having its angles as \( 53^{\circ}, 64^{\circ} \) and \( 63^{\circ} ? \)
\( \mathbf{A} \cdot \mathbf{1} \)
B. 2
c. None
D. More than 2


\( \mathbf{A} \)
1 kg body slides from the point \( A \) (see figure), along a horizontal track with an initial speed of \( 6 m s^{-1}, \) towards a weightless horizontal spring of length
\( 2 m \) and force constant \( 4 N m^{-1} \). The
part \( A B \) of the track is frictionless and
the part \( B C \) has the coefficients of
static and dynamic friction as 0.22 and
\( 0.2, \) respectively. Find the total distance
through which the block moves, before
it comes to rest completely \( .(g= \)
\( 10 m s^{-2} \) ), if \( A B=4 m \) and \( B D= \)
\( \mathbf{4 . 2 8 m} \)


Which of the following is correct for the
given structure?
A. These are small structures which work like oars
B. It is covered with plasma membrane
C. Its core is called axoneme
D. All of these


Simplify:\( \int x \ell n \sqrt{x} d x \)


Number of teeth which are
monophyodont in man are
A . 4
B. 22
c. 32
D. 12


The angular momentum of an electron in an orbit is quantized because it is a necessary condition for the compatibility with
A. Wave nature of electron
B. Particle nature of electron
c. Pauli's exclusion behaviour
D. None of these


What is Short Sightedness?


Which of the following is not a property of an ionic compound?
A. Soft and flexible
B. Hard and brittle
c. crystal lattice structure
D. Conducts electricity when dissolved in water
E. Good insulator when solid