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When ether is exposed to air for sometime an explosive substance
produced is:
A. peroxide
B. oxide
c. тNT
D. superoxide
| 1 |
Chemistry
|
Form the differential equation by eliminating the arbitrary constants from the equation \( y=a \cos (2 x+b) \) is
A \( \cdot \frac{d^{2} y}{d x^{2}}+4 y=0 \)
B. \( \frac{d^{2} y}{d x^{2}}-4 y=0 \)
c. \( \frac{d^{2} y}{d x^{2}}+2 y=0 \)
D. \( \frac{d^{2} y}{d x^{2}}+y=0 \)
| 2 |
Maths
|
The potential energy of a particle of mass \( 5 \mathrm{kg} \) moving in the \( \mathrm{x} \) -y plane is given by the equation, \( U=-7 x+24 y \)
Joule. Here \( x \) and \( y \) are in the meter at \( t=0, \) the particle is at the origin and moving with velocity \( (2 \hat{i}+3 \hat{j}) m / s . \) The
magnitude of acceleration of particle is
\( \mathbf{A} \cdot 3 m / s^{2} \)
B . \( 5 \mathrm{m} / \mathrm{s}^{2} \)
D. \( 15 \mathrm{m} / \mathrm{s}^{2} \)
| 3 |
Physics
|
Under whose leadership the Atomic Energy Department of India was established?
A. Homi Jahangir Bhabha
B. Vikram Sarabhai
c. Satish Dhawan
D. A.P.J. Abdul Kalam
| 3 |
Physics
|
If the pancreatic duct of a healthy dog is blocked an hour after it had its food,
which one of the following functions of the pancreas will not be affected?
A. Carbohydrate digestion
B. Neutralization of chyme
c. Break down of protein
D. None of the above
| 0 |
Biology
|
Select the option that correctly
identifies \( A \) to \( E \) in the given flow chart.
\( \mathbf{A} \cdot A-\alpha, B-\beta, C-G|u c a g o n, D-H y p e r g| y c a e m i a, E- \)
Hypoglycaemia
B. A- \( \beta \), B- \( \alpha \), C-Cortisol, D-Hypoglycaemia, EHyperglycaemia
C \( . A-\beta, B-\alpha, C \) -Cortisol, D-Hyperglycaemia, EHypoglycaemia
D. \( A-\beta, B-\alpha, C \) -Glucagon, D-Hypoglycaemia, EHyperglycaemia
| 0 |
Biology
|
\( \mathbf{2 4} \times \mathbf{2 7}= \)
| 2 |
Maths
|
The geometric mean between two numbers \( a \) and \( b \) is
A. \( \sqrt{a b} \)
B. \( \frac{1}{\sqrt{a b}} \)
c. \( \sqrt{2 a b} \)
D. \( 2 \sqrt{a b} \)
| 2 |
Maths
|
Ethers are isomeric with:
A. aldehydes
B. ketones
C. both aldehydes and ketones
D. alcohols
| 1 |
Chemistry
|
Nitrogen gas is very difficult to identify
because of its :
A. High dissociation energy
B. Characteristic colour
c. Unreactive nature
D. High electronegativity
| 1 |
Chemistry
|
A Toy cart attached to the end of an
unstretched string of length a, when received moves on a smooth horizontal
table in a circle of radius 2 s with a time
period T. Now the toy cart is speeded up until it moves in a circle of radius 3 a
with a period 'T'. If Hook's law holds then (Assume no friction)
A \( \cdot T^{\prime}=\sqrt{\frac{3}{2}} \pi \)
B \cdot \( T^{\prime}=\left(\frac{\sqrt{3}}{2}\right) T \)
\( \mathbf{c} \cdot \mathbf{T}^{\prime}=\left(\frac{3}{2}\right) \mathbf{T} \)
D. \( T^{\prime}=T \)
| 3 |
Physics
|
Assertion
When the ambient temperature is high and soil contains excess of water, the plants tend to lose water in the form of
droplets from lenticels.
Reason
Root pressure regulates the rate of loss of water form lenticels.
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
|
The smallest animal egg is that of
A . ostrich
B. Human female
c. Duck
D. Hen
| 0 |
Biology
|
Find the values of the following:
\( \sin 120^{\circ} \)
| 2 |
Maths
|
Two circular coils 1 and 2 are made from
the same wire but the radius of 1st coil
is twice that of the 2 nd coil. What
potential difference in volts should be
applied across them so that the magnetic magnetic field at the centres is the same
A. 4 times of first coil
B. 6 times of first coil
c. 2 times of first coil
D. 3 times of first coil
| 3 |
Physics
|
\( 75 g \) of water at \( 10^{\circ} C \) is heated by supplying \( 25200 J \) of heat energy. If the specific heat capacity of water is
\( 4.2 J / g^{o} C . \) Calculate the final temperature of water
\( \mathbf{A} \cdot 0^{\circ} C \)
B. \( 10^{\circ} \mathrm{C} \)
c. \( 100^{\circ} \mathrm{C} \)
D. \( 90^{\circ} \mathrm{C} \)
| 3 |
Physics
|
What are the constituents of
'Mischmetal'?
A. \( L a, F e \)
в. \( L a, C e \)
c. \( F e, C e \)
D. Ce.Cu
| 1 |
Chemistry
|
The geometry and the number of
unpaired electron(s) of \( \left[M n B r_{4}\right]^{2-} \) respectively, are:
A. tetrahedral and 1
B. square planarand
c. tetrahedral and 5
D. square planar and 5
| 1 |
Chemistry
|
To construct a triangle similar to given \( \Delta A B C \) with its sides \( \frac{4}{5} \) of that of
\( \Delta A B C . \) Locate points \( X_{1}, X_{2}, X_{3}, \dots \)
on ray \( B X \) at equal distances such that
\( \angle A B X \) is acute. The minimum number
of points to be located on \( B X \) is:
A . 14
B. 5
\( c .9 \)
D . 20
| 2 |
Maths
|
A particle falling under gravity
describes \( 80 f t \) in a certain sec. How
long does it take to describe next \( 112 f t \)
\( ?\left[\boldsymbol{g}=\boldsymbol{3} 2 \boldsymbol{f} \boldsymbol{t} \boldsymbol{s}^{-2}\right] \)
\( \mathbf{A} \cdot 1 s \)
B . \( 2 s \)
c. \( 3 s \)
D. \( 4 s \)
| 3 |
Physics
|
At \( 27^{\circ} \mathrm{C} \) two moles of an ideal
monoatomic gas occupy a volume \( V \) The gas expands adiabatically to a
volume \( 2 \mathrm{V} \). Calculate the final
temperature of the gas.
A \( \cdot T_{f}=388.99 \mathrm{K} \)
в. \( T_{f}=288.99 \mathrm{k} \)
c. \( T_{f}=188.99 \mathrm{k} \)
D. \( T_{f}=588.99 \mathrm{K} \)
| 1 |
Chemistry
|
\( \operatorname{lf}\left|\begin{array}{lll}\boldsymbol{x}_{1} & \boldsymbol{y}_{1} & \mathbf{1} \\ \boldsymbol{x}_{2} & \boldsymbol{y}_{2} & \mathbf{1} \\ \boldsymbol{x}_{3} & \boldsymbol{y}_{3} & \mathbf{1}\end{array}\right|=\left|\begin{array}{lll}\boldsymbol{a}_{1} & \boldsymbol{b}_{1} & \mathbf{1} \\ \boldsymbol{a}_{2} & \boldsymbol{b}_{2} & \mathbf{1} \\ \boldsymbol{a}_{3} & \boldsymbol{b}_{3} & \mathbf{1}\end{array}\right| \) then the
two triangles with vertices \( \left(x_{1}, y_{1}\right),\left(x_{2}, y_{2}\right),\left(x_{3}, y_{3}\right) \) and
\( \left(a_{1}, b_{1}\right),\left(a_{2}, b_{2}\right),\left(a_{3}, b_{3}\right) \) are
A . equal in area
B. similar
c. congruent
D. none of these
| 2 |
Maths
|
A particle (1) of mass m initially at A is at rest. The radius of circular path is 1
m. The particle (1), collides at bottom
with an other particle (2) of same mass
m. The distance travelled by the particle
(2) before coming at rest is
\( 4.1 .5 \mathrm{m} \)
B. 2.5
\( c .3 .5 \mathrm{m} \)
\( D \)
| 3 |
Physics
|
тре
(I) Quadrılateral MUKE
\( M O=6 \mathrm{cm} \)
\( \boldsymbol{O} \boldsymbol{R}=\mathbf{4 . 5} \boldsymbol{c m} \)
\( \angle M=60^{\circ} \)
\( \angle O=105^{\circ} \)
\( \angle R=105^{\circ} \)
(ii) Quadrilateral \( \boldsymbol{P} \boldsymbol{L} \boldsymbol{A} \boldsymbol{N} \)
\( \boldsymbol{P L}=\boldsymbol{4} \boldsymbol{c m} \)
\( \boldsymbol{L} \boldsymbol{A}=\mathbf{6 . 5} \boldsymbol{c m} \)
\( \angle \boldsymbol{P}=\mathbf{9 0}^{\circ} \)
\( \angle A=110^{\circ} \)
\( \angle N=85^{\circ} \)
(iii) Parallelogram \( \boldsymbol{H} \boldsymbol{E} \boldsymbol{A} \boldsymbol{R} \)
\( \boldsymbol{H} \boldsymbol{E}=\mathbf{5} \boldsymbol{c m} \)
\( \boldsymbol{E} \boldsymbol{A}=\boldsymbol{6} \boldsymbol{c m} \)
\( \angle \boldsymbol{R}=\mathbf{8} \mathbf{5}^{\circ} \)
(iv) Rectangle \( \boldsymbol{O} \boldsymbol{K} \boldsymbol{A} \boldsymbol{Y} \)
\( \boldsymbol{O} \boldsymbol{K}=\mathbf{7} \boldsymbol{c m} \)
\( \boldsymbol{K} \boldsymbol{A}=\mathbf{5} \boldsymbol{c m} \)
| 2 |
Maths
|
The resistance between \( A \) and \( B \) is
A \( \cdot \frac{288}{56} \Omega \)
В. \( 12 \Omega \)
\( c \cdot \frac{8}{3} \Omega \)
D. \( \frac{9}{4} \Omega \)
| 3 |
Physics
|
How many dead centres are there in one cycle of steam engine?
A . 4
B. 3
c. 2
\( D \)
| 3 |
Physics
|
Write balanced net ionic equation for
the following reactions in acidic
solution.
\[
\begin{array}{l}
\boldsymbol{S}_{4} \boldsymbol{O}_{6}^{2-}(\boldsymbol{a} \boldsymbol{q})+\boldsymbol{A l}(\boldsymbol{s}) \rightarrow \boldsymbol{H}_{2} \boldsymbol{S}(\boldsymbol{a} \boldsymbol{q})+ \\
\boldsymbol{A l}^{3+}(\boldsymbol{a} \boldsymbol{q})
\end{array}
\]
\( \mathbf{A} \cdot S_{4} O_{6}^{2-}(a q)+6 A l(s)+20 H^{+} \rightarrow 4 H_{2} S(a q)+ \)
\[
6 A l^{3+}(a q)+6 H_{2} O
\]
\( \mathbf{B} \cdot 2 S_{4} O_{6}^{2-}(a q)+6 A l(s)+20 H^{+} \rightarrow 4 H_{2} S(a q)+ \)
\[
2 A l^{3+}(a q)+6 H_{2} O
\]
\( \mathbf{c} \cdot S_{4} O_{6}^{2-}(a q)+5 A l(s)+20 H^{+} \rightarrow 4 H_{2} S(a q)+ \)
\[
3 A l^{3+}(a q)+6 H_{2} O
\]
D. None of the above
| 1 |
Chemistry
|
Photorespiration is also called as
A \( \cdot C_{2} \) cycle
B. \( C_{3} \) cycle
\( \mathbf{c} \cdot C_{4} \) cycle
D. None of the above
| 0 |
Biology
|
Why is \( I_{2} \) less reactive than \( I C l \) ?
| 1 |
Chemistry
|
Which of the following statement is
correct?
A. A person with myopia can see distant objects clearly
B. A person with hypermetropia can see nearby objects clearly
C. A person with myopia can see nearby objects clearly
D. A person with hypermetropia cannot see distant objects clearly
| 3 |
Physics
|
The limiting molar conductivity and molar conductivity of acetic acid are
\( 390.5 s . c m^{2} . m o l^{-1} \) and
\( 48.15 s . c m^{2} . m o l^{-1} \) respectively
Calculate the degree of dissociation of the weak acid?
\( \mathbf{A} \cdot 1.233 \)
B. 12.33
c. 0.1233
D. 0.01233
| 1 |
Chemistry
|
State the following statement is True or
False
A parabolic arch has a height 18 meters and span 24 meters. Then the height of the arch at 8 meters from the centre of the span is equal to 10
A. True
B. False
| 2 |
Maths
|
Is the name 2-methyl-3-buntanol correct? Explain.
| 1 |
Chemistry
|
Sound travels the fastest in which
medium?
A. Gaseous
B. Liquid
c. Solid
D. Vacuum
| 3 |
Physics
|
One mole is defined as:
A. quantity having a mass equal to its atomic/molecular
mass
B. quantity having mass equal to half of its atomic/molecular mass
C. one gram of any quantity
D. one kilograms of any quantity
| 1 |
Chemistry
|
The chemical change in DNA molecule that could lead to synthesis of protein with an altered amino acid sequence is
called
A. replication
B. lipid formation
c. cellular membrane
D. mutation
| 1 |
Chemistry
|
Sodium hydrogen carbonate is used in fire extinguisher.
A. True
B. False
| 1 |
Chemistry
|
The number of peptide bonds in the
compound is :
\( A \)
B.
\( c \)
\( D \)
| 1 |
Chemistry
|
\( A, B, C \) are any three events. If \( P(S) \)
denotes the probability of \( S \) happening,
\( \operatorname{then} \boldsymbol{P}(\boldsymbol{A} \cap(\boldsymbol{B} \cup \boldsymbol{C}))= \)
A \( \cdot P(A)+P(B)+P(C)-P(A \cap B)-P(A \cap C) \)
B . \( P(A)+P(B)+P(C)-P(B) P(C) \)
C \( \cdot P(A \cap B)+P(A \cap C)-P(A \cap B \cap C) \)
D. None of these
| 2 |
Maths
|
Which of the following represent redox reactions?
\( \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+2^{\ominus} \boldsymbol{O} \boldsymbol{H} \longrightarrow 2 \boldsymbol{C r} \boldsymbol{O}_{4}^{2-}+ \)
\( \boldsymbol{H}_{2} \boldsymbol{O} \)
II. \( Z n+C u S O_{4} \longrightarrow Z n S O_{4}+C u \)
III. \( 2 M n O_{4}^{\ominus}+3 M n^{2+}+4 \stackrel{\theta}{O} H \longrightarrow \)
\( \mathbf{5} M n O_{2}+2 H_{2} O \)
IV. \( 2 C u^{\oplus} \longrightarrow C u+C u^{2+} \)
A . ।, । ।
в. ।, ॥
c. ॥ा, ।ा
D. ॥, ॥I, IV
| 1 |
Chemistry
|
Two similar cells, whether joined in series or in parallel, have the same current through an external resistance
of \( 2 \Omega . \) The internal resistance of each
cell is
A . \( 1 \Omega \)
B. 2\Omega
\( c .0 .5 \Omega \)
D. \( 1.5 \Omega \)
| 3 |
Physics
|
The relation "congruence modulo \( m " \) is:
A. reflexive only
B. symmetric only
c. transitive only
D. an equivalence relation
| 2 |
Maths
|
The leaf in which the stomata remains
confined to lower surface of the leaf is
known as
A. Amphistomatic
B. Hypostomatic
c. Epistomatic
D. All of the above
| 0 |
Biology
|
Urea synthesis occurs in
A. Kidney
B. Liver
c. Brain
D. Muscles
| 0 |
Biology
|
Twelve identical resistors of \( 6 \Omega \)
each are connected to form a cube as
shown above. The effective resistance
across the solid diagonal, AG is :
\( A .5 \Omega \)
B. \( 4.5 \Omega \)
\( c .3 .5 \Omega \)
\( \mathbf{D} \cdot 1.5 \Omega \)
| 3 |
Physics
|
Which of the following reaction is an example of a redox reaction?
A. \( X e F_{2}+P F_{5} \rightarrow[X e F]^{+}+P F_{6} \)
в. \( X e F_{6}+H_{2} O \rightarrow X e O F_{4}+2 H F \)
c. \( X e F_{6}+2 H_{2} O \rightarrow X e O_{2} F_{2}+4 H F \)
D. \( X e F_{4}+O_{2} F_{2} \rightarrow X e F_{6}+O_{2} \)
| 1 |
Chemistry
|
In fractionating colum:
A. vapours of high boiling point substance condense and fall back into a distillation flask
B. vapours of low boiling point substance condense and fall back into a distillation flask
C. vapours of high boiling point substance condense and evaporate
D. both \( B \) and \( C \)
| 1 |
Chemistry
|
When you hit a wall and sponge with equal force. Which case will hurt more?
A. Both equally
B. wall
c. sponge
D. No comparison
| 3 |
Physics
|
The sum of the solution of the equation \( 2 \sin ^{-1} \sqrt{x^{2}+x+1}+ \)
\( \cos ^{-1} \sqrt{x^{2}+x}=\frac{3 \pi}{2} \) is
\( \mathbf{A} \cdot \mathbf{0} \)
B. - 1
\( c \cdot 1 \)
\( D \)
| 2 |
Maths
|
In barley stem vascular bundles are -
A. Closed and radial
B. Open and scattered
c. closed and scattered
D. open and in a ring
| 0 |
Biology
|
Give reason: we wear a number of
garments in winter rather than one
thick garment
| 3 |
Physics
|
Apes share \( \ldots \ldots . . . . . . . . \) blood groups with
man.
\( A \cdot A, B, A B \)
B. A, B, O
c. \( A B, O \)
D. A and B
| 0 |
Biology
|
Two wires are kept tight between the
same pair supports. The tensions in the wires are in the ration \( 2: 1, \) the radii are
in the ratio 3: 1 and the densities are in
the ratio \( 1: 2 . \) The ratio of their
fundamental frequencies is
A .2: 3
B. 2: 4
c. 2: 5
D. 2: 6
| 3 |
Physics
|
Which of the following is true with respect to crystal field splitting in complexes?
\( \mathbf{A} \cdot \Delta_{0}=\Delta_{t} \)
B. \( \triangle_{0}=\frac{9}{4} \Delta_{t} \)
c. \( \Delta_{t}=\frac{9}{4} \Delta_{0} \)
D. \( \triangle_{t}=\frac{2}{3} \Delta_{0} \)
| 1 |
Chemistry
|
Formation of nucleotide is a
A. Anabolic reaction
B. Catabolic reaction
c. Both A and B
D. None of the above
| 0 |
Biology
|
Find the electric field in the copper wire
of area of cross section \( 2 m m^{2} \) carrying
a current of 1 A. The resistivity of
copper is \( 1.7 \times 10^{-8} \Omega m \)
A . \( 4.25 \times 10^{-3} \mathrm{V} / \mathrm{m} \)
B . \( 8.5 \times 10^{-3} \mathrm{V} / \mathrm{m} \)
c. \( 8.5 V / m \)
D. \( 9.5 \times 10^{-3} \mathrm{V} / \mathrm{m} \)
| 3 |
Physics
|
Excessive release of \( C O_{2} \) into the
atmosphere results in:
A. polar vortex
B. depletion of ozone
\( c . \) formation of smog
D. global warming
| 1 |
Chemistry
|
A fair die is tossed 1620 times. If
getting a face with 6 points is considered as a success, then \( E(x)= \) \( \ldots \ldots ., V(x)=\dots \ldots . . \)
A .270,270
в. 270,225
c. 270,25
D. 27,250
| 2 |
Maths
|
A given ray of light suffers minimum
deviation in an equilateral prism \( P \)
Additional prism \( Q \) and \( R \) of identical
shape and of the same material as \( \boldsymbol{P} \)
are now added as shown in the figure. The ray will now suffer.
A. Greater deviation
B. No deviation
c. Same deviation as before
D. Total internal reflection
| 3 |
Physics
|
The armature of a DC motor has \( 20 \Omega \)
resistance. It draws a current of 1.5
amp when run by \( 200 V \) DC supply. The value of back emf induced in it will be
\( \mathbf{A} \cdot 150 V \)
в. \( 170 V \)
\( \mathbf{c} \cdot 180 V \)
D. \( 190 V \)
| 3 |
Physics
|
The ratio of thermal capacities of two aluminium spheres of radii \( 8 \mathrm{cm} \) and 16 \( \mathrm{cm} \) is
\( A \cdot 4: 1 \)
B. 1: 4
c. 1: 8
D. 8: 1
| 3 |
Physics
|
The periodic time of a particle doing simple harmonic motion is 4 s. The time taken for it to go from its mean position to half the maximum displacement (amplitude) is.
\( \mathbf{A} \cdot 2 s \)
B . \( 1 s \)
c. \( \frac{2}{3} s \)
D. \( \frac{1}{3} s \)
| 3 |
Physics
|
A positively charged disk is rotated clockwise as shown in the figure. The
direction of the magnetic field at point
\( A \) in the plane of the disk is
\( A \cdot \otimes \) into the page
B. \( \rightarrow \) towards right
\( \mathbf{c} . \leftarrow \) towards left
D. \odot out of the page
| 3 |
Physics
|
Which of the following animals are involved in the fluid feeding mode?
A. Honey bees
B. Amoeba
\( c . \) cow
D. None of the above
| 0 |
Biology
|
Which order of relative size among the following is incorrect?
A. \( L i<N a<K \)
в. \( C<S i<A l \)
c. \( M g>A l<N a \)
D. \( F<C l<B r \)
| 1 |
Chemistry
|
If \( \boldsymbol{\alpha} \boldsymbol{\epsilon}\left(-\frac{\boldsymbol{\pi}}{2}, \boldsymbol{0}\right), \) then find the value of
\( \tan ^{-1}(\cot \alpha)-\cot ^{-1}(\tan \alpha) \)
| 2 |
Maths
|
What is the use of kink near the bulb in
clinical thermometer
This question has multiple correct options
A. It prevents the level of the mercury from falling when taken out of the mouth
B. It allows the level of the mercury to fall when taken out of the mouth
C. It allows the level of the mercury to rise when taken out of the mouth
D. It prevents the level of the mercury from rising when taken out of the mouth
| 3 |
Physics
|
A solid sphere of radius \( \boldsymbol{R} \) has total charge \( 2 Q \) and volume charge density
\( \rho=k r \) where \( r \) is distance from centre.
Now charges \( Q \) and \( -Q \) are placed diametrically opposite at distance \( 2 a \) where \( a \) is distance form centre of
sphere such that net force on charge \( Q \) is zero then relation between \( a \) and \( R \) is
A \( \cdot a=R / 2 \)
В . \( a=R \)
c. \( a=2 R \)
D. \( a=3 R / 4 \)
| 3 |
Physics
|
The mass defect of \( _{2}^{4} H e \) is \( 0.03 u . \) The binding energy per nucleon of helium \( (\text { in } M e V) \) is
A . 69.825
B. 6.9825
c. 2.793
D. 27.93
| 3 |
Physics
|
The energy gap in case of which of the following is less than \( 3 e V ? \)
A. Aluminium
B. Iron
c. Germanium
D. copper
| 3 |
Physics
|
In a calorimeter of water equivalent 20
g, water of mass \( 1.1 \mathrm{kg} \) is taken at \( 288 \mathrm{K} \) temperature \( 373 \mathrm{K} \) is passed through it and temperature of water increases by
\( 6.5^{\circ} \mathrm{C} \) then the mass of steam
condensed is
A. \( 17.5 \mathrm{g} \)
в. \( 11.7 \mathrm{g} \)
c. \( 15.7 \mathrm{g} \)
D. \( 18.2 \mathrm{g} \)
| 3 |
Physics
|
An insect \( 8 m \) away from the foot of a lamp post which is \( 6 m \) tall, crawls towards it. After moving through a distance, its distance from the top of the lamp post is equal to the distance it has moved. How far is the insect away
from the foot of the lamp post? [Bhaskaracharya's Leelavathi]
| 2 |
Maths
|
Which element exhibits the greatest
number of oxidation states in its
compounds?
A. \( C a \)
в. \( V \)
c. \( C u \)
D. Na
| 1 |
Chemistry
|
Factorise the expression and divide them as directed.
\( \left(m^{2}-14 m-32\right) \div(m+2) \)
| 2 |
Maths
|
What are biodegradable and nonbiodegradable detergents ? Give one example of each.
| 1 |
Chemistry
|
How can you determine the focal length of a convex lens experimentally. Draw a
rough diagram.
| 3 |
Physics
|
Write any three uses of infrared
radiations.
| 3 |
Physics
|
The volume of \( O_{2} \) gas at S.T.P. obtained
by the decomposition of 1 c.c. of \( \boldsymbol{H}_{2} \boldsymbol{O}_{2} \)
solutionis known as its volume
strength. If this is true enter 1 , if false enter 0 .
| 1 |
Chemistry
|
Convert given percents to decimal fractions and also to fractions in
simplest forms:
\( \mathbf{2 5 \%} \)
| 2 |
Maths
|
The fraction of ice that melts by mixing
equal masses of ice at \( -10^{\circ} \mathrm{C} \) and
water at \( 60^{\circ} \mathrm{C} \) is :
A \( \cdot \frac{6}{11} \)
в. \( \frac{11}{16} \)
c. \( \frac{5}{16} \)
D. \( \frac{11}{15} \)
| 3 |
Physics
|
Two particles \( A \) and \( B \) are placed as
shown in Fig. A.12. The particle \( A \), on the top of tower, is projected horizontally with a velocity \( u \) and particle \( B \) is projected along the surface towards the
tower, simultaneously. If both particles
meet each other, then the speed of projection of particle \( \boldsymbol{B} \) is [ignore any friction]
A \( \cdot d \sqrt{\frac{g}{2 H}} u \)
в. \( d \sqrt{\frac{g}{2 H}} \)
\( c \)
\[
d \sqrt{\frac{g}{2 H}}-u
\]
D.
| 3 |
Physics
|
Electrons at rest are accelerated by a
potential of \( \boldsymbol{V} \) volt. These electrons enter the region of space having a uniform, perpendicular magnetic induction field \( B \). The radius of the path
of the electrons inside the magnetic field is:
A \( .1 / B \sqrt{m V / e} \)
B. \( \frac{\sqrt{2 m V / e}}{B} \)
c. \( m V / q B \)
D. \( 1 / B \sqrt{V / e} \)
| 3 |
Physics
|
The moon's distance from the earth is
\( 360000 \mathrm{km} \) and its diameter subtends
an angle of \( 42^{\prime} \) at the eye of the observer. The diameter of the moon is?
A. \( 4400 \mathrm{km} \)
B . \( 1000 \mathrm{km} \)
\( \mathbf{c} .3600 \mathrm{km} \)
D. \( 8800 \mathrm{km} \)
| 2 |
Maths
|
Which of the following examples is/are oil in water type emulsions?
\( A \cdot \ln k \)
B. Detergent
c. Soap
D. Milk
| 1 |
Chemistry
|
The voltage in the primary and the
secondary coils of a step up transformer are \( 200 \mathrm{V} \) and \( 4 \mathrm{KV} \) respectively. If the
current in the primary is 1 ampere then the current in the secondary coil will be
\( A \cdot 50 \mathrm{m} \) A
B. 500 \( \mathrm{m} \) A
\( c \cdot 5 A \)
\( D \cdot 5 m A \)
| 3 |
Physics
|
Which of the following is present in monocot flowers?
A. Sepals
B. Petals
c. Tepals
D. None of the above
| 0 |
Biology
|
A current of \( 1.0 A \) exists in a copper wire
of cross-section \( 1.0 \mathrm{mm}^{2} \). Assuming one
free electron per atom
Calculate drift speed of the free electron in the wire \( _{--}-_{-}-_{-} \) (the density of
copper is \( \left.9000 k g m^{2}\right) \)
A. \( 0.74 \mathrm{mms}^{-1} \)
B. \( 7.4 m m s^{-1} \)
\( \mathbf{c} \cdot 74 m m s^{-1} \)
D. \( 0.074 \mathrm{mms}^{-1} \)
| 3 |
Physics
|
This is known as heavy hydrogen:
A. protium
B. tritium
c. deuterium
D. proton
| 1 |
Chemistry
|
In summer, a mild wind is often found
on the shore of a calm river. This is due
to :
A. difference in thermal conductivity of water and soil
B. convection currents
c. conduction between air and the soil
D. radiation from the soil
| 3 |
Physics
|
\( (+)- \) Mandelic acid has a specific
rotation of \( +158^{\circ} . \) What would be the
observed specific rotation of a mixture of \( 25 \%(-)- \) mandelic acid and \( \mathbf{7 5 \%}(+)- \) mandelic acid:
A . \( +118.5^{\circ} \)
в. \( -118.5^{\circ} \)
\( \mathrm{c} .-79^{\circ} \)
D. +79
| 1 |
Chemistry
|
Which of following plant cells are without vacuoles and without nuclei?
A. Cambium cells
B. Xylem vessels
c. Root hairs
D. Companion cells
| 0 |
Biology
|
The most stable conformation of
ethylene glycol and but-2-ene are respectively.
A. anti and anti
B. gauche and anti
c. gauche and gaushe
D. partially eclipsed and anti
| 1 |
Chemistry
|
Which selection correctly shows units for specific heat capacity?
A \( \cdot \) Cal \( \cdot g \cdot^{\circ} C \)
в. \( C a l \cdot g /^{\circ} C \)
\( \mathbf{c} \cdot J /\left(g \cdot^{o} C\right) \)
D. \( g / J \). \( ^{\circ} C \)
| 1 |
Chemistry
|
Q Type your question
the following information carefully and
answer the questions given below. The sub divided bar diagram given below depicts the result of Class XII students of a school for three years.
The number of students passed with
second class in 2000 is what percent of
number of students passed with first
class in 2002?
A. 50\%
B. 62.5\%
c. \( 45 \% \)
D. 70.5
| 2 |
Maths
|
Liquid benzene \( \left(C_{6} H_{6}\right) \) burns in oxygen
according to \( 2 C_{6} H_{6}(I)+15 O_{2}(g) \rightarrow \)
\( 12 C O_{2}(g)+6 H_{2} O(g) . \) How many litres
of \( O_{2} \) at STP are needed to complete the
combustion of 39 g of liquid benzene?
A . \( 74 L \)
B. \( 11.2 L \)
c. \( 22.4 \mathrm{L} \)
D. 84L
| 1 |
Chemistry
|
Formula of the hydrocarbon
is
A \( \cdot C_{3} H_{8} \)
в. \( C_{3} H_{6} \)
\( \mathbf{c} \cdot C_{3} H_{4} \)
D. \( C_{2} H_{6} \)
| 1 |
Chemistry
|
Show that \( \frac{2 \tan 30^{\circ}}{1-\tan ^{2} 30^{\circ}}=\sqrt{3} \)
| 2 |
Maths
|
Which group elements are the most reactive among the non-metals?
A . 15 th
B. 16th
c. 17 th
D. 18th
| 1 |
Chemistry
|
Microorganisms commonly causing
diarrhoeal diseases are
A. Escherichia coli, Shigella, Campylobacter and Bacillus pertussis
B. Clostridium tetani, Giardia, Entamoeba histolytica, Salmonella, Shigella and Escherichia coli
C. Escherichia coli, Giardia, Shigella, Campylobacter and Salmonella
D. Neisseria, Treponema, Escherichia, Giardia, Shigella, Campylobacter and Salmonella
| 0 |
Biology
|
Fire extinguisher pyrene is:
A \( \cdot C O_{2} \)
в. \( C C l_{4} \)
c. \( C H C l_{3} \)
D. \( H_{2} C O_{3} \)
| 1 |
Chemistry
|
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