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Assertion
Two point coherent sources of light \( \boldsymbol{S}_{1} \)
and \( S_{2} \) are placed on a line as shown in
figure. \( P \) and \( Q \) are two points on that
line. If at point \( \boldsymbol{P} \) maximum intensity is observed, then maximum intensity should also be observed at \( Q \)
Reason
In the figure, the distance \( \left|\boldsymbol{S}_{1} \boldsymbol{P}-\boldsymbol{S}_{2} \boldsymbol{P}\right| \)
is equal to distance \( \left|\boldsymbol{S}_{1} \boldsymbol{Q}-\boldsymbol{S}_{2} \boldsymbol{Q}\right| \)
\[
\vec{Q} \quad \overrightarrow{s_{1}} \quad \dot{S_{2}} \quad \dot{P}
\]
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. Assertion is incorrect but Reason is correct
| 3 |
Physics
|
n different toys are to be distributed among n children. Find the number of
ways in which these toys can be distributed so that exactly one child
gets no toy
| 2 |
Maths
|
A wire carrying a current of \( 5 A \) is placed perpendicular to a magnetic induction of \( 2 T . \) The force on each centimeter of
the wire is
A. \( 0.1 N \)
в. \( 10 N \)
c. \( 100 N \)
D. \( 1 N \)
| 3 |
Physics
|
If the difference between the
circumference and radius of a circle is
\( 37 \mathrm{cm}, \) then the area of the circle is
A \( \cdot 111 c m^{2} \)
В. \( 148 \mathrm{cm}^{2} \)
\( \mathrm{c} \cdot 259 \mathrm{cm}^{2} \)
D. \( 154 \mathrm{cm}^{2} \)
| 2 |
Maths
|
An equation of a line through the point
(1,2) whose distance from the point
(3,1) has the greatest value is
A \( y=2 x \)
\( x \)
B. \( y=x+1 \)
c. \( x+2 y=5 \)
D. \( y=3 x-1 \)
| 2 |
Maths
|
Assertion
The pollen tube is believed to release some stimulus for the increased growth
in the ovary wall.
Reason
The auxins can increase the activity of ovary even in the absence of pollen grain or pollen tube.
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
| 0 |
Biology
|
Energy in a current carrying coil is stored in the form of
A . electric field
B. magnetic field
c. dielectric strength
D. heat
| 3 |
Physics
|
The number of quanta of radiation of frequency \( 4.98 \times 10^{14} s^{-1} \) required to
melt 100 g of ice are (latent heat of melting of ice is 33 joule per \( g \) ):
A \( \cdot 10^{20} \)
B. \( 10^{2} \)
\( c \cdot 10^{24} \)
D. \( 6.023 \times 10^{21} \)
| 3 |
Physics
|
State the law of limiting factor
| 0 |
Biology
|
How many structural and
stereoisomers could be obtained by monochlorination of propene with
chlorine?
\( A \cdot 2 \)
B. 5
\( c \cdot 3 \)
D. 4
| 1 |
Chemistry
|
Energy levels I, II, Ill of a certain atom correspond to increasing values of
energy i.e., \( \boldsymbol{E}_{\boldsymbol{I}}<\boldsymbol{E}_{\boldsymbol{I I}}<\boldsymbol{E}_{\boldsymbol{I I I}} . \) If \( \boldsymbol{\lambda}_{1}, \boldsymbol{\lambda}_{2}, \boldsymbol{\lambda}_{3} \)
be the wavelengths of radiations corresponding to the transitions III to II
II to I and III to I respectively, which of the following relations is correct?
A. \( \lambda_{1}=\lambda_{2}+\lambda_{3} \)
B. \( \lambda_{3}=\frac{\lambda \lambda_{2}}{\lambda_{1}+2_{2}} \)
c. \( \lambda_{1}+\lambda_{2}+\lambda_{3}=0 \)
D \( \cdot \lambda \frac{2}{3}=\lambda_{1}^{2}+\lambda \frac{2}{2} \)
| 3 |
Physics
|
In the above question, find out the magnitude of net force exerted by the
pulley on the road \( \boldsymbol{R}_{\mathbf{1}} \)
A \( .2 F \)
в. \( F \)
c. \( 2 \sqrt{2} F \)
D. \( \frac{F}{\sqrt{2}} \)
| 3 |
Physics
|
Two clocks are being tested against a
standard clock located in a nationa
laboratory. At 12: 00: 00 noon bv the standard clock, the readings of the two
clocks are:
\( \begin{array}{lll} & \text { Clock 1 } & \text { Clock 2 } \\ \text { Monday } & 12: 00: 05 & 10: 15: 06 \\ \text { Tuesday } & 12: 01: 15 & 10: 14: 59 \\ \text { Wednesday } & 11: 59: 08 & 10: 15: 18 \\ \text { Thursday } & 12: 01: 50 & 10: 15: 07 \\ \text { Friday } & 11: 59: 15 & 10: 14: 53 \\ \text { Saturday } & 12: 01: 30 & 10: 15: 24 \\ \text { Sunday } & 12: 01: 19 & 10: 15: 11\end{array} \) If you are doing an experiment that requires precision time interval
measurements, which of the two clocks
will you prefer?
| 3 |
Physics
|
Among the alkali metals \( C s \) is the most
reactive because:
A. its incomplete shell is nearest to the nucleus
B. it has a single electron in the valence shell
C. it is the heaviest alkali metal
D. its outermost electron is more loosely bound than the outermost electron ofthe other alkali metals
| 1 |
Chemistry
|
The ratio in which (2,3) divides the line
segment joining (4,8),(-2,-7) is
A. 2: 1 externally
B. 2: 3
c. 4: 3 externally
D. 1: 2
| 2 |
Maths
|
Which of the following ions is a good oxidising agent?
\( A \cdot E u^{2} \)
B. \( \mathrm{ce}^{4} \)
\( c \cdot y b^{2} \)
D. \( \mathrm{Sm}^{2+} \)
| 1 |
Chemistry
|
A dynamo makes 100 cycles per second. The frequency of the AC is
A. \( 100 \mathrm{Hz} \)
в. 200 нz
c. 50 нz
D. 400 нz
| 3 |
Physics
|
Calculate the forces \( F(y) \) associated with the following one-dimensional
potential energies:
(a) \( U=-\omega y \)
(b) \( U=a y^{3}-b y^{2} \)
\( (c) U=U_{0} \sin \beta \gamma \)
| 3 |
Physics
|
Find the distance between the parallel
lines
\( 3 x+2 y=7 \) and \( 9 x+6 y=5 \)
| 2 |
Maths
|
What is so important about the troposphere?
A. Layer of water at or near Earths surface
B. Contains ozone
c. It contains weather and the oxygen that we breath
D. All of the above
| 1 |
Chemistry
|
Represent the following mixed infinite decimal periodic fractions as common fractions:
\( \left(\frac{1}{a-\sqrt{2}}-\frac{a^{2}+4}{a^{3}-\sqrt{8}}\right) \)
\( \left(\frac{a}{\sqrt{2}}+1+\frac{\sqrt{2}}{a}\right)^{-1} \)
| 2 |
Maths
|
When 100 g of a saturated solution is evaporated at \( 50^{\circ} \mathrm{C}, 50 \mathrm{g} \) of solid is left over. Find the solubility of the
substance at \( 50^{\circ} \mathrm{C} \)
A . 100
B. 50
c. 75
D. 28
| 1 |
Chemistry
|
Find the direction ratio of the line
\( \frac{x-1}{2}=3 y=\frac{2 z+3}{4} \)
| 2 |
Maths
|
\( \ln \) an \( A C \) circuit, voltage \( V=V_{0} \sin \omega t \)
and inductor L is connected across the
circuit.Then the instantaneous power
will be
\( ^{\mathrm{A}} \cdot \frac{V_{0}^{2}}{2 \omega L} \sin \omega t \)
B. \( \frac{-V_{-}^{2}}{2 \omega L} \) sinwt
c. \( \frac{-V_{0}^{2}}{2 \omega L} \sin 2 \omega t \)
D. \( \frac{V_{0}^{2}}{\omega L} \sin 2 \omega t \)
| 3 |
Physics
|
Find the number of nitrates which gives
\( N O_{2} \) gas on heating from the following:
Nitrogen dioxide is released on heating:
\( N H_{4} N O_{3}, K N O_{3}, N a N O_{2}, P b\left(N O_{3}\right)_{2} \)
| 1 |
Chemistry
|
Evaluate the integral \( \int_{-1}^{1}(\sqrt{1-x+x^{2}}-\sqrt{1+x+x^{2}}) d x \)
\( A \cdot \frac{1}{2} \)
в.
c. 0
\( D \)
| 2 |
Maths
|
connected across a \( 4 m \) long uniform
wire having resistance \( 4 \Omega / m . \) The cells
of small emfs \( \epsilon_{1}=2 V \) and \( \epsilon_{2}=4 V \)
having internal resistance \( 2 \Omega \) and \( 6 \Omega \)
respectively, are connected as shown in
the figure. If galvanometer shows no
deflection at the point \( N, \) the distance
of point \( N \) from the point \( A \) is equal to
\( A \cdot \underline{1}_{-} \)
\( B \cdot 1 \)
\( -n \)
c. \( 25 \mathrm{cm} \)
D. 50
| 3 |
Physics
|
The \( p H \) of a \( 0.02 M \) ammonia solution
which is \( 5 \% \) ionized will be:
\( A \cdot 2 \)
B. 5
\( c \cdot 7 \)
D. 11
| 1 |
Chemistry
|
Differentiate the following functions
w.r.t. \( \boldsymbol{x} \)
\( e^{\operatorname{cosec}^{2} x} \)
| 2 |
Maths
|
Assertion
If refractive index of one medium is
equal to refractive index of second
medium, then beam does not bend at
all.
Reason
The bending of light does not depend on refractive indices of media.
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
| 3 |
Physics
|
Identify the correct order of reactivity in electrophilic substitution reactions of the following compounds:
\( A \cdot|>||>|||>\mid V \)
B. IV>|||> || > |
c. ॥>।>॥|> >V
D. II>III>1>IV
| 1 |
Chemistry
|
Construct a quadrilateral \( R E A D, \) when
\( \boldsymbol{R} \boldsymbol{E}=\mathbf{3 . 5 1} \mathrm{cm}, \boldsymbol{E} \boldsymbol{A}=\mathbf{4 . 3} \mathrm{cm}, \boldsymbol{A D}= \)
\( 4.8 \mathrm{cm}, \angle E=105^{\circ} \& \angle R=55^{\circ} \)
| 2 |
Maths
|
If the current in a primary coil of transformer decreases from \( 0.8 \mathrm{A} \) to 0.2
\( A \) in 4 millisecond, then calculate induced emf in the secondary coil
[Coefficient of mutual induction is 1.76
\( \mathrm{H}] \)
| 3 |
Physics
|
The figure obtained by joining the midpoints of the sides of a rhombus taken
in order is
A . a square
B. a rhombus
c. a rectangle
D. parallelogram
| 2 |
Maths
|
What is the density (in \( g m / \)lit ) of wet air with \( 75 \% \) relative humidity at 1 at
and \( 300 K ? \) Given : vapour pressure of
\( H_{2} O \) is 30 torr and average molar
mass of air is \( 29 g / \) mol.
Write as the nearest integer:
| 1 |
Chemistry
|
The angular momentum of an electron revolving in a circular orbit is
What is its magnetic moment?
A \( \cdot \frac{m}{2 e} \)
B. \( \frac{e J}{2 m} \)
\( c \cdot \frac{2 m}{e J} \)
\( D \cdot \frac{e m J}{2} \)
| 3 |
Physics
|
A particle of mass \( m \) is moving in
horizontal circle of radius \( r \) with
uniform speed \( v \). When it moves from one point to a diametrically opposite point its
A. KE changes by \( m v^{2} \).
B. KE changes by \( \frac{1}{4} m v^{2} \).
c. momentum does not change.
D. momentum changes by \( 2 m v \)
| 3 |
Physics
|
In a uniform circular motion, the angle
between the velocity and acceleration is
\( \mathbf{A} \cdot \mathbf{0} \)
B . \( 45^{\circ} \)
\( c \cdot 60^{\circ} \)
D. \( 75^{\circ} \)
E \( .90^{\circ} \)
| 3 |
Physics
|
Diphenyl hydrazine is same as:
A. azoxybenzene
B. azobenzene
c. hydrazobenzene
D. aniline
| 1 |
Chemistry
|
What are the various energy
transformations that occur when you
are riding a bicycle?
| 3 |
Physics
|
Calculate the solubility of \( A g C N \) in a
buffer solution of \( \boldsymbol{p} \boldsymbol{H}=\mathbf{3 . 0} \)
\( \boldsymbol{K}_{s p}(\boldsymbol{A} \boldsymbol{g} \boldsymbol{C} \boldsymbol{N})=\mathbf{1 . 2} \times \)
\( \mathbf{1 0}^{-16}, \boldsymbol{K}_{\boldsymbol{a}}(\boldsymbol{H} \boldsymbol{C N})=\mathbf{4 . 8} \times \mathbf{1 0}^{-\mathbf{1 0}} . \) There
is no \( C N^{-} \) or \( A g^{+} \) ion in the buffer
previously.
| 1 |
Chemistry
|
Fibres are obtained from
A. \( \mathrm{Xylem}, \) phloem and sclerenchyma
B. Xylem, phloem, sclerenchyma and epidermis
C . Xylem, parenchyma and epidermis
D. Xylem, parenchyma and endodermis
| 0 |
Biology
|
In the electric field due to a point
charge \( \boldsymbol{q}, \) a test charge is carried from
\( A \) to the points \( B, C, D \) and \( E \) lying on
the same circle around \( q \). The work done
is
A. the least along \( A B \)
B. the least along \( A D \)
C. zero along any one of the paths \( A B, A D, A C \) and \( A E \)
D. the least along \( A E \).
| 3 |
Physics
|
Point charge \( q_{0} \) is placed inside a cone of base radius 'R', x distance below
centre of the top surface as shown in figure.Find electric flux related to
curved surface of the cone:-
A \( \cdot \frac{q}{2 \varepsilon_{0}} \)
в. \( \frac{q}{\varepsilon_{0}}-\frac{q}{2 \varepsilon_{0}}\left(1-\frac{x}{\sqrt{R^{2}+x^{2}}}\right) \)
c. \( \frac{q}{\varepsilon_{0}}\left(1-\frac{x}{\sqrt{R^{2}+x^{2}}}\right) \)
D. \( \frac{q}{\varepsilon_{0}} \times\left(\frac{x}{\sqrt{R^{2}+x^{2}}}\right) \)
| 3 |
Physics
|
Find out displacement of B till velocity becomes equal
A. \( 7.5 \mathrm{m} \)
B. 10
\( c \cdot 13.25 \mathrm{m} \)
D. \( 12.5 \mathrm{m} \)
| 3 |
Physics
|
At low pressure, the fraction of the surface covered follows:
A. zero-order kinetics
B. first order kinetics
c. second order kinetics
D. fractional order kinetics
| 1 |
Chemistry
|
Assertion (A): Propagation of light through an optical fibre is due to total internal reflection taking place at the core-cladding interface. Reason (R) : Refractive index of the material of the core of the optical fibre is greater than that of air.
A. Both (A) and (R) are true and
(R) is the correct explanation of (A)
B. Both (A) and (R) are true but (R) is not the correct explanation of (A)
c. (A) is true and (R) is false
D. (A) is false and (R) is true
| 3 |
Physics
|
The triad of nuclei that is isotonic is:
\( \mathbf{A} \cdot_{6}^{14} C, \frac{15}{7} N,_{9}^{17} F \)
В . \( _{6}^{12} C, \frac{14}{7} N, \) ' \( _{19}^{9} F \)
\( \mathbf{C} \cdot_{6}^{14} C, \frac{14}{7} N,_{9}^{17} F \)
\( \mathbf{D} \cdot_{6}^{14} C, \frac{14}{7} N, \frac{19}{9} F \)
| 1 |
Chemistry
|
I: If \( \mathrm{f}^{\prime}(\mathrm{a})<0 \) then the function \( \mathrm{f} \) is
decreasing at \( \mathbf{x}=\mathbf{a} \)
Il: If \( f \) is decreasing at \( x=a \) then
\( \mathbf{f}^{\prime}(\mathbf{a})<\mathbf{0} \)
Which of the above statements are true
\( ? \)
A. only
B. only II
c. both land II
| 2 |
Maths
|
The reagent that has action on glass is:
A . aqua regia
B. hydrofluoric acid
c. oleum
D. fuming nitric acid
| 1 |
Chemistry
|
Figure \( (3-E 6) \) shows \( x-t \) graph of a
particle. Find the time \( t \) such that the average velocity of the particle during the period 0 to \( t \) is zero
| 3 |
Physics
|
"Of the alkali metal carbonates, only
\( L i_{2} C O_{3} \) decomposes to give \( C O_{2} \) and
metal oxide."
Answer whether the above statement is
true or false.
If true enter 1 , else enter 0 .
| 1 |
Chemistry
|
A solution contains \( 3.22 g \) of \( H C l O_{2} \) in
\( 47.0 g \) of water. The freezing point of the
solution is \( 271.10 K \)
Calculate the fraction of \( H C l O_{2} \) that
undergoes dissociation to \( \boldsymbol{H}^{+} \) and
\( C l O_{2}^{-} \)
Given: \( \boldsymbol{K}_{f}(\boldsymbol{w} \boldsymbol{a} \boldsymbol{t e r})=\mathbf{1 . 8 6} \boldsymbol{K} \boldsymbol{k g} \boldsymbol{m o l}^{-1} \)
B. \( \alpha=0.204 \)
C . \( \alpha=0.30 \)
D. \( \alpha=0.60 \)
| 1 |
Chemistry
|
Circular single stranded DNA occurs in bacteriophage
\( \mathbf{A} \cdot T_{2}, T_{4} \)
в. \( \phi \times 174, \) М 13
c. \( T_{3}, \phi 6 \)
D. \( \delta, T_{5} \)
| 0 |
Biology
|
Term tertiary, secondary and primary amine represents the:
A. number of amino groups
B. nature of C atom
c. degree of substitution on nitrogen
D. degree of uunsaturation
| 1 |
Chemistry
|
The meiosis takes place in
A. Apical meristem
B. Inter calary meristem
C. Reproductive cells
D. Vegetative cells
| 0 |
Biology
|
What does this \( \lambda \) symbol indicates?
| 3 |
Physics
|
A chemist is preparing to analyse samples that will contain no more than \( 0.5 \mathrm{g} \) of uranium. His procedure calls for
preparing the uranium as \( U^{4+} \) ion and
oxidizing it by \( M n O_{4}^{-} \) in acid solution:
\( \boldsymbol{U}^{4+}+\boldsymbol{M} \boldsymbol{n} \boldsymbol{O}_{4}^{-}+\boldsymbol{H}_{2} \boldsymbol{O} \rightarrow \boldsymbol{U} \boldsymbol{O}_{2}^{2+}+ \)
\( \boldsymbol{M} \boldsymbol{n}^{2+}+\boldsymbol{H}_{3} \boldsymbol{O}^{+} \)
If he wants to react the total \( U^{4+} \)
sample with a maximum of \( 50 \mathrm{ml} \) of \( K M n O_{4} \) solution, what concentration does he choose? \( (\mathrm{U}=238) \)
A. 0.0336 M
B. 0.0168 М
c. 0.168 м
D. 0.0672 M
| 1 |
Chemistry
|
Who among the following was a paleobotanist?
A. P. Maheshwari
B. S.R. Kashyap
c. Birbal Sahni
D. v. Purir
| 0 |
Biology
|
If \( \boldsymbol{f}(\boldsymbol{x})= \)
\( \left\{\begin{array}{ccc}\sqrt{1+k x}-\sqrt{1-k x} & \text { for } & -1 \leq x<0 \\ x & \text { for } 0 \leq x<1\end{array}\right. \)
is continuous at \( \boldsymbol{x}=\mathbf{0} \) then \( \boldsymbol{k}= \)
| 2 |
Maths
|
Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?
A. One can breathe out air totally without oxygen
B. One can breathe out air through Eustachian tube by closing both nose and mouth
c. one can consciously breathe in and breathe out by moving the diaphragm alone, without moving the ribs at all
D. The lungs can be made fully empty by forcefully breathing out all air from them.
| 0 |
Biology
|
The amount of biodegradable organic matter in sewage water can be estimated by measuring
A. Biochemical Oxygen Demand (BOD)
B. The growth of anaerobic bacteria in water
c. Biogeological oxygen demand
D. The growth of aerobic bacteria in water
| 0 |
Biology
|
A rod of mass \( m \) spins with an angular speed \( \omega=\sqrt{g / l}, \) Find its
a. Kinetic energy of rotation.
b. kinetic energy of translation
c. Total kinetic energy.
| 3 |
Physics
|
A 12 pF capacitor is connected to a 50 V battery. How much electrostatic energy
is stored in the capacitor?
| 3 |
Physics
|
\( 32 \% \) of the teachers in a school females
and the number of male teachers is 85
Find the total number of teachers in the
school.
| 2 |
Maths
|
The resultant magnetic moment due to two currents carrying concentric coils of radius \( r, \) mutually perpendicular to
each other will be
A. \( \sqrt{2} i \)
B. \( \sqrt{2} i \pi r^{2} \)
\( \mathbf{c} \cdot 2 \pi r^{2} \)
D. \( \sqrt{2} i r^{2} \)
| 3 |
Physics
|
The electronic configuration, \( 1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6}, 3 d^{9} \) represents a
A. Metal atoms
B. non metals atom
c. non-metallic anionic
D. metallic cation
| 1 |
Chemistry
|
The cost of \( 2 \mathrm{kg} \) of apples and \( 1 \mathrm{kg} \) of grapes on the day was found to be Rs.
160. After a month the cost of \( 4 \mathrm{kg} \) of
apples \( 2 \mathrm{kg} \) of grapes is \( \mathrm{Rs} .300 \) Represent the situation algebraically.
| 2 |
Maths
|
The rate of change of the area of a circle with respect to its radius \( r \) at \( r=6 c m \)
is.
\( \mathbf{A} \cdot 10 \pi \)
в. \( 12 \pi \)
\( c \cdot 8 \pi \)
D. \( 11 \pi \)
| 2 |
Maths
|
Calomel electrode is reversible with
respect to:
\( A \cdot H^{+} \) ions
B. \( \mathrm{Hg}_{2}^{2+} \) ions
c. \( \mathrm{cl}^{-} \) ions
D. None of these
| 1 |
Chemistry
|
Fix up one end of a slinky to a hook and hold it horizontally. Vibrate the other end to and fro along the length of the spring. If you look the spring carefully, you will see some parts of the spring are pushed closer, while some other
parts are pulled apart.
A. the portions which are pushed closer are called compressions
B. the portions which are pulled apart are called rarefactions
c. both a and \( b \)
D. none
| 3 |
Physics
|
In
1911, the physicist Emest Rutherford discovered that atoms have a tiny, dense nucleus by shooting positively charged particles at a very thin gold foil A key physical property which led Rutherford to use gold that it was.
A. Electrically conducting
B. Highly malleable
c. shiny
D. None-reactive
| 3 |
Physics
|
Area bounded by the parabola \( y^{2}=x- \)
3 and \( x=5, \) is \( \dots . s q \) units
\( A \cdot \frac{8 \sqrt{2}}{3} \)
B. \( 4 \sqrt{2} \)
\( \mathrm{c} \cdot 3 \sqrt{2} \)
D. \( 5 \sqrt{2} \)
| 2 |
Maths
|
The deflection of the magnetic needle in
the galvanoscope connected to the
stationary circular coil AB(see figure) increases if
A. The strength of the magnet is decreased
B. The velocity of the magnet is increased
c. The number of turns in the coil is increased
D. Both B and C
| 3 |
Physics
|
Why are in the household electric
circuits the electric appliances
(instruments) connected in parallel combination?
| 3 |
Physics
|
Before Robert Norman worked on 'Dip and Field Concept', his predecessor thought that the tendency of the magnetic needle to swing towards the
poles was due to a point attractive. However, Norman showed with the help of experiment that nothing like point attractive exists. Instead, he argued that magnetic power lies is lodestone. Which one of the following is the problem on which Norman and others
worked?
A. Existence of point attractive
B. Magnetic power in lodestone
c. Magnetic power in needle
D. swinging of magnetic needle
| 2 |
Maths
|
Blood circulation that starts in
capillaries and ends in capillaries is called
A. Portal circulation
B. Hepatic circulation
c. cardiac arrest
D. None of the above
| 0 |
Biology
|
Which of the following elements does not belong to p-block?
A . sr
B. Po
c. As
D. Ga
| 1 |
Chemistry
|
Which among the following substances is not a component of the mixture used
for glazing pottery?
A. Feldspar
B. Silica
c. Borax
D. Alumina
| 1 |
Chemistry
|
In dicot roots, cells of which of the
following region show Casparian strips?
A. Cambium
B. Endodermis
c. Pericycle
D. Hypodermis
| 0 |
Biology
|
Find number of \( p \pi-d \pi \) bonds in
(a) Disulphate
(b) triphosphate
trimetaphosphate
(d) trimer of \( S O_{3} \)
\( (e) P_{4} O_{10} \)
\( (f) P_{4} O_{6} \)
| 1 |
Chemistry
|
Chlorine reacts with excess of ammonia
to form:
A \( \cdot N H_{4} C l \)
в. \( N_{2}+H C l \)
c. \( N_{2}+N H_{4} C l \)
D. \( N_{2}+H C l_{3} \)
| 1 |
Chemistry
|
\( \operatorname{Let} \mathbf{L}=\lim _{\mathbf{x} \rightarrow 0}= \)
\( \frac{\boldsymbol{a}-\sqrt{\boldsymbol{a}^{2}-\boldsymbol{x}^{2}}-\frac{\boldsymbol{x}^{2}}{\boldsymbol{4}}}{\boldsymbol{x}^{4}}, \boldsymbol{a}>0 \) If \( \boldsymbol{L} \) is finite
then
This question has multiple correct options
\( \mathbf{A} \cdot a=2 \)
B. \( a=1 \)
\( c \cdot_{L}=\frac{1}{64} \)
D. \( L=\frac{1}{32} \)
| 2 |
Maths
|
The atrio-ventricular node is situated
A. Near the bicuspid valve
B. In between the atrium
c. At the base of inter-auricular septumm
D. In the interventricular septum
| 0 |
Biology
|
In the given circuit, the value of resistance effect of the coil Lis exactly
equal to the resistance R. Bulbs B1 and B2 are exactly identical. Answer the following question.
a) Which one of the two bulbs lights up earlier, when key k is closed and why?
b) What will be the comparative brightness of the two bulbs after sometime if the key \( \mathrm{K} \) is kept closed
and why?
| 3 |
Physics
|
The magnetic field due to a current carrying circular loop of radius \( 3 \mathrm{m} \) at a point on the axis at a distance of \( 4 \mathrm{m} \)
from the centre is \( 54 \mu T . \) What will be its
value at the centre of the loop?
A. \( 250 \mu T \)
в. \( 150 \mu T \)
c. \( 125 \mu T \)
D. \( 75 \mu T \)
| 3 |
Physics
|
Q Type your question.
\( H C l \) at \( 0-5^{\circ} C, \) and this mixture is
added to p-toludine (p-methyl aniline)?
\( A \)
3
\( c \)
\( D \)
| 1 |
Chemistry
|
Which of the following atoms should
have the highest 1st electron affinity?
A. \( F \)
B. \( O \)
\( c . N \)
D. \( C l \)
| 1 |
Chemistry
|
Consider the time interval \( t=2.0 s \) to
\( \boldsymbol{t}=\mathbf{4} . \mathbf{0} \boldsymbol{s} \)
The magnetic field is perpendicular to
the plane of the loop.
| 3 |
Physics
|
For two given events \( \boldsymbol{A} \) and \( \boldsymbol{B}, \boldsymbol{P}(\boldsymbol{A} \cap \boldsymbol{B}) \)
is :
This question has multiple correct options
A. not less than \( P(A)+P(B)-1 \)
B. not greater than \( P(A)+P(B) \)
c. equal to \( P(A)+P(B)-P(A \cup B) \)
D. equal to \( P(A)+P(B)+P(A \cap B) \)
| 2 |
Maths
|
The concentration of a solution is
\( \mathbf{1 0}^{-4} \boldsymbol{M} \) for \( \boldsymbol{C l}^{-}, \mathbf{1 0}^{-\mathbf{5}} \boldsymbol{M} \) for \( \boldsymbol{B r}^{-} \) and
\( 10^{-3} \mathrm{M} \) for \( I^{-} . A g N O_{3}(s) \) is added slowly to the solution. If the minimum
concentration of \( \boldsymbol{A} \boldsymbol{g}^{+} \) required to start
precipitation of all three ions is \( 10^{-x} \)
then the value of \( x \) is
\( \left[\text { Given, } \boldsymbol{K}_{s p(A g C l)}=\mathbf{1 0}^{-\mathbf{1 0}}, \boldsymbol{K}_{s p(A g B r)}=\right. \)
\( \left.\mathbf{1 0}^{-\mathbf{1 3}}, \boldsymbol{K}_{\boldsymbol{s p}(\boldsymbol{A g I})}=\mathbf{1 0}^{-\mathbf{1 7}}\right] \)
| 1 |
Chemistry
|
Assertion \( (A): H_{2} S \) is more volatile than
\( \boldsymbol{H}_{2} \boldsymbol{O} \)
Reason (R): Oxygen atom is smaller in size as compared to sulphur.
A. Both \( A \) and \( R \) are true and \( R \) is the correct explanation of \( A \)
B. Both \( A \) and \( R \) are true and \( R \) is not the correct explanation of
c. \( A \) is true but \( R \) is false
D. \( A \) is false but \( R \) is true
| 1 |
Chemistry
|
Sodium metal should be stored under
kerosene.
| 1 |
Chemistry
|
Faraday's laws of electrolysis are related to the:
A. the atomic number of the cation
B. the atomic number of anion
c. the equivalent weight of the electrolyte
D. the speed of the cation
| 1 |
Chemistry
|
If four moles of electrons are transferred
from anode to cathode in a experiment
on electrolysis of water, then total volume of the two gases produced at
STP will be:
\( \mathbf{A} \cdot 224 L \)
B. \( 72.6 L \)
c. \( 67.2 L \)
D. \( 89.4 L \)
| 1 |
Chemistry
|
A car is moving with speed \( 10 m / s \) on a
circle path of radius \( 2 m \). If speed is
increasing at the rate of \( 10 m / s^{2} . \) The acceleration of car is
\( \mathbf{A} \cdot \sqrt{26} m / s^{2} \)
B . \( 10 \sqrt{26} \mathrm{m} / \mathrm{s}^{2} \)
\( \mathbf{c} \cdot 5 \sqrt{26} m / s^{2} \)
D. \( 10 \sqrt{13} \mathrm{m} / \mathrm{s}^{2} \)
| 3 |
Physics
|
Write the symbols of the first ten elements in the periodic table with the atomic numbers.
| 1 |
Chemistry
|
Consider the reaction of chloromethane
with \( O H^{-} \) in aqueous solution
\( \boldsymbol{C H}_{3} \boldsymbol{C l}(\boldsymbol{a q})+ \)
\( O H(a q) \stackrel{K_{f}}{\underbrace{K_{r}}} C H_{3} O H(a q)+C l(a q) \)
At \( 25^{\circ} C, \) the rate constant for the
forward reaction is \( 6 \times 10^{6} M^{1} s^{-1}, \) and
the equilibrium constant \( K_{c} \) is \( 1 \times 10^{16} \)
Calculate the rate constant for the
reverse reaction at \( 25^{\circ} C \)
A \( .3 \times 10^{22} \)
B . \( 6 \times 10^{22} \)
C \( \cdot 12 \times 10^{22} \)
D. \( 12 \times 10^{23} \)
| 1 |
Chemistry
|
Which one of the following is used as a test for aliphatic primary amines?
A. Tollen's test
B. Fehling's lest
c. Isocyanide test
D. Azo dye test
E. Phthalein fusion test
| 1 |
Chemistry
|
Assertion
Chlorine gas disproportionate in hot \( \& \) conc. NaOH solution
Reason
NaCl and NaOCl are formed in the above
reaction.
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
| 1 |
Chemistry
|
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