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The two molecules indicated are
capable of intramolecular hydrogen
bonding which is likely to form more
stable hydrogen bonds. Select the
correct statement
A. A has higher H-bonding
B. B has higher H-bonding
C. Both A and B have equal H-bonding
D. None of these
| 1 |
Chemistry
|
The surface energy of a liquid drop is \( \boldsymbol{E} \)
It is sprayed into 1000 equal droplets.
The work done in spraying is
\( \mathbf{A} \cdot 999 E \)
в. \( 99 E \)
\( \mathrm{c} .9 \mathrm{E} \)
D. \( E \)
| 3 |
Physics
|
State the nature of the given quadratic
equation \( 3 x^{2}+4 x+1=0 \)
A. Real and Distinct Roots
B. Real and Equal Roots
c. Imaginary Roots
D. None of the above
| 2 |
Maths
|
An ideal gas is initially at \( P_{l}, V_{1} \) is
expanded to \( P_{2}, V_{2} \) and then compressed adiabatically to the same
volume \( V_{l} \) and pressure \( P_{3} \).If \( W \) is the
net work done by the gas in complete process which of the
A. \( W>0 ; P_{3}>P_{1} \)
В. \( W<0 ; P_{3}>P_{1} \)
c. \( W<0 ; P_{3} \)
D. \( P_{2}>P_{1} ; W<0 \)
| 3 |
Physics
|
A scientist took 8 molecules of cytosoic aldolase into an enzyme reaction mixture to study its activity. After ten minutes of enzyme reaction, \( 60 \% \) of its
substrate was found converted into
2400 molecules of products. Then what is the TON of aldolase and number of
substrate molecules left over in the
reaction mixture?
A . 30,1440
B. 30,960
\( c .15,1280 \)
D. 15,800
| 0 |
Biology
|
Choose the correct answer from the
alternatives given. The \( _{--} \) produces red blood cells, which transport \( _{--} \) and some
A. liver, oxygen, mineral ions
B. liver, oxygen, carbon dioxide
c. bone marrow; oxygen; hormones
D. bone marrow; oxygen; carbon dioxide
| 0 |
Biology
|
A stone is tied to the middle of a string
and suspended from one end as shown
in the given figure. Here \( S \) is the stone and 0 is the point of suspension. If you
give a sharp jerk at \( P, \) the string will break:
A. below the stone
B. at the point P itself
c. from above the stone
D. nothing can be decided
| 3 |
Physics
|
In the conversion of \( B r O_{3}- \) to \( B r O_{4}^{-} \)
A. there is no change in oxidation number
B. reduction takes place in basic solution
C. reduction also takes place by \( X e F_{2} \)
D. equivalent mass of \( B r O_{3}^{-} \) is one-half of ionic mass
| 1 |
Chemistry
|
The roots of the equation \( x^{2}+2 \sqrt{3} x+ \)
\( \mathbf{3}=\mathbf{0} \) are
A . real and unequal
B. rational and equal
c. irrational and equal
D. irrational and unequal
| 2 |
Maths
|
In A.C circuit having only capacitor, the current
A ' lags behind the voltage by \( \frac{\pi}{2} \) in phase
B. Ieads the voltage by \( \frac{\pi}{2} \) in phase
c. leads the voltage by \( \pi \) in phase
D. lags behind the voltage by \( \pi \) in phase
| 3 |
Physics
|
Find values of \( k \) if area of triangle is 4
sq. units and vertices are
(i) \( (k, 0),(4,0),(0,2) \)
(ii) \( (2,0),(0,4),(0, k) \)
| 2 |
Maths
|
\( \int_{1}^{2} \frac{1-x}{1+x} d x \) equals
\( \left(\frac{1}{2}\right) \log \left(\frac{3}{2}\right)-1 \)
B \( \cdot 2 \log \left(\frac{3}{2}\right)-1 \)
\( ^{\mathbf{C}} \cdot \log \left(\frac{3}{2}\right)-1 \)
D. None of these
| 2 |
Maths
|
A circular loop of radius \( \boldsymbol{R} \), carrying
current \( I \), lies in \( x-y \) plane with its
center at the origin. The total magnetic
flux through \( x-y \) plane is
This question has multiple correct options
A. directly proportional to \( l \)
B. directly proportional to \( R \)
c. inversely proportional to \( R \)
D. zero
| 3 |
Physics
|
Assertion
No net force acts on a rectangular coil
carrying a steady current when
suspended freely in a uniform magnetic
field.
Reason
Force on coil in magnetic field is always
non-zero.
A. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
B. If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
C. If Assertion is correct but Reason is incorrect.
D. If Assertion is incorrect but Reason is correct.
| 3 |
Physics
|
The differential equation of the family of
curves \( r^{2}=a^{2} \cos 2 \theta \) where 'a' is
arbitrary constant is:
This question has multiple correct options
A \( \cdot \frac{d r}{d \theta}=-r \tan 2 \theta \)
B. \( \frac{d r}{d \theta}=r \cot 2 \theta \)
c. \( \frac{d r}{d \theta} \cos 2 \theta+r \sin 2 \theta=0 \)
D. \( \frac{d r}{d \theta}=0 \)
| 2 |
Maths
|
Sum of all the rational terms in the
expansion of \( \left(2^{1 / 3}+3^{1 / 2}\right)^{6} \) is
A . 31
B. 83
c. 27
D. 91
| 2 |
Maths
|
The \( x \) and \( y \) coordinates of the particle
at any time are \( x=5 t-2 t^{2} \) and \( y= \)
10t respectively, where \( x \) and \( y \) are in
meters and \( t \) in seconds. The
acceleration of the particle at \( t=2 s \) is:
\( A \cdot 0 \)
В. \( 5 m / s^{2} \)
c. \( -4 m / s^{2} \)
D. \( -8 m / s^{2} \)
| 3 |
Physics
|
A ray of light is incident at the glass-
water interface at an angle i. It merges
finally parallel to the surface of water.
Then, the value of \( \mu_{g} \) would be :
A \( \cdot(4 / 3) \sin i \)
B. \( 1 / \)sini
c. \( 4 / 3 \)
\( D \)
| 3 |
Physics
|
Enzymes are also called biocatalyst?
A. True
B. False
| 0 |
Biology
|
A cold, green flame can be made by passing carbon dioxide over warm.
A. Grey tin
B. White phosphorous
c. Bronze
D. Green candles
| 1 |
Chemistry
|
Convert the following ratios into
percentage:
47: 50:
| 2 |
Maths
|
Assertion
Aluminium containers can be used for
\( \operatorname{storing} \boldsymbol{H} \boldsymbol{N} \boldsymbol{O}_{3} \)
Reason
Nitric acid cannot oxidize aluminium at
all.
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
|
The number of coordinate bonds
presents in \( S O_{3} \) molecule are:
\( \mathbf{A} \cdot \mathbf{1} \)
B. 2
\( c \cdot 3 \)
D. none of these
| 1 |
Chemistry
|
A light circular cone buoy is pressed by
a \( 500 N \) force as shown in figure then
the path depth upto which it will
submerge is
A \( .1 .7 \mathrm{m} \)
3. 2.0 .
\( c .2 .1 m \)
D. 3.0
| 3 |
Physics
|
Vector \( \vec{A} \) is \( 2 c m \) long and is \( 60^{\circ} \) above
the \( x \) -axis in the first quadrant. Vector
\( \vec{B} \) is \( 2 c m \) long and is \( 60^{\circ} \) below the \( x \) axis in the fourth quadrant. The sum \( \vec{A}+\vec{B} \) is a vector of magnitude
A. \( 2 c m \) along positive y-axis
B. 2cm along positive x-axis
c. \( 2 c m \) along negative y-axis
D. \( 2 c m \) along negative x-axis
| 2 |
Maths
|
A student is asked to connected four
cells of e.m.f of \( 1 \mathrm{V} \) and internal
resistance 0.5 ohm in series with an
external resistance of 1 ohm. But one
cell is wrongly connected by him with its terminal reversed. the current in the
circuit is
A \( \cdot \frac{1}{3} A \)
в. \( \frac{2}{3} A \)
c. \( \frac{3}{4} \)
D. \( \frac{4}{3} \)
| 3 |
Physics
|
Wrote the following as mixed fraction \( \frac{7}{2}, \frac{8}{5} \)
| 2 |
Maths
|
Which of the following statements is
true about RBCs in humans?
A. They carry about \( 20-25 \) per cent of \( C O_{2} \)
B. They transport 99.5 per cent of \( O_{2} \)
C. They transport about 80 per cent oxygen only and the rest 20 per cent of it is transported in dissolved state in blood-plasma.
D. They do not carry \( C O_{2} \) at all.
| 0 |
Biology
|
Persistent calyx is characteristics of
A. Allium / Liliaceae
B. Hibiscus / Malvaceae
C. Dalbergia / Papionatae
D. Solanum / Solanaceae
| 0 |
Biology
|
Which step in the following problem is wrong? \( \boldsymbol{a}=\boldsymbol{b}=\mathbf{1} \)
\( \boldsymbol{a}=\boldsymbol{b} \)
step-1: \( a^{2}=a b \)
step-2: \( a^{2}-b^{2}=a b-b^{2} \)
step-3: \( (\boldsymbol{a}+\boldsymbol{b})(\boldsymbol{a}-\boldsymbol{b})=\boldsymbol{b}(\boldsymbol{a}-\boldsymbol{b}) \)
step- \( 4: a+b=\frac{b(a-b)}{a-b} \)
\( \boldsymbol{a}+\boldsymbol{b}=\boldsymbol{b} \)
\( \mathbf{1}+\mathbf{1}=\mathbf{1} \)
\( \mathbf{2}=\mathbf{1} \)
A. Step-4
B. Step-3
c. step- -
D. Step- -
| 2 |
Maths
|
Find the area of the Parallelogram ABCD
and hence find the value of \( x \)
| 2 |
Maths
|
2011 is the international year of
chemistry. "Chemistry is our life, our
future", is the motto.
"Chemistry is not a problem but a solution" is the message of green chemistry. Explain the relevance of this message.
| 1 |
Chemistry
|
Which of the following arrangments does not represent the correct order of
the property stated against it?
(1) \( V^{2+}<C r^{2+}<M n^{2}<F e^{2+} \)
paramagnetic behaviour
(2) \( N i^{2+}<C o^{2+}<F e^{2+}<M n^{2+} \)
ionic size
(3) \( C o^{3+}<F e^{3+}<C r^{3+}<S c^{3+} \)
stability in aqueous solution
(4) \( S c<T i<C r<M n: \) number of
oxidation states
| 1 |
Chemistry
|
What describes a spontaneous
reaction?
A. Positive \( \Delta H \)
B. Negative \( \Delta H \)
c. Positive \( \Delta G \)
D. Negative \( \Delta G \)
| 1 |
Chemistry
|
Which of the following is planar?
A. \( X e F_{2} \)
в. \( X e O_{3} F \)
c. \( X e O_{2} F_{2} \)
D. \( X e F_{4} \)
| 1 |
Chemistry
|
Prussian blue colour is obtained by mixing together an aqueous solution of \( \boldsymbol{F} \boldsymbol{e}^{\boldsymbol{3}+} \) salt with:
A. ferricyanide
B. ferrocyanide
c. hydrogen cyanide
D. sodium cyanide
| 1 |
Chemistry
|
The value of magnetic susceptibility for para-magnetic substance is
A . infinity
B. low positive
c. low negative
D. zero
| 3 |
Physics
|
Mechanical waves transport
A. Energy only
B. Energy and mass
C. Mass only
D. Neither energy not mass
| 3 |
Physics
|
The audible frequency for a normal human being is \( 20 \mathrm{Hz} \) to \( 20 \mathrm{kHz} \). Find
the corresponding wavelengths if the speed of sound in air \( 320 \mathrm{m} / \mathrm{s} \)
| 3 |
Physics
|
A solution at \( 20^{\circ} \mathrm{C} \) is composed of 1.5
mol of benzene and 3.5 mol of toluene. If
the vapour pressure of pure benzene of
pure benzene and pure toluene at this temperature are 74.7 torr and 22.3 torr. respectively, then the total vapour pressure of the solution and the benzene mole fraction in equilibrium with it will be, respectively.
A. 38.0 torr and 0.589
B. 30.5 torr and 0.389
c. 35.8 torr and 0.280
D. 35.0 torr and 0.480
| 1 |
Chemistry
|
Two bodies are in thermal equilibrium if they have the same:
A. temperatures
B. amount of heat
c. specific heat
D. thermal capacity
| 3 |
Physics
|
Explain the formation of \( \boldsymbol{O}_{2} \) molecule
using molecular orbital theory.
| 1 |
Chemistry
|
It is assumed that a photon takes \( 10^{6} \) years to reduce travel from core to the
surface of the sun. Find the average distance that light can travel within the
interior of the sun without being scattered.
\( \mathbf{A} \cdot 2 m m \)
в. \( 0.1 \mathrm{mm} \)
\( \mathrm{c} .0 .4 \mathrm{mm} \)
D. \( 0.6 \mathrm{mm} \)
| 3 |
Physics
|
The glittering nature of diamond is due
to?
A. Giant polymer structure
B. High refractive index
C. High IP value of carbon
D. High electro negativity of carbon
| 1 |
Chemistry
|
The value of \( \wedge_{m}^{\infty} \) for \( K C l \) and \( K N O_{3} \) are
149.86 and \( 154.96 \Omega^{-1} c m^{2} m o l^{-1} \)
respectively. Also \( \lambda_{C l^{-}}^{\infty} \) is 71.44 ohm \( ^{-1} \mathrm{cm}^{2} \) mol \( ^{-1} \). The value of
\( \lambda_{N O_{3}^{-}}^{\infty} \) is :
A \( \cdot 76.54 \) ohm \( ^{-1} \mathrm{cm}^{2} \) mol \( ^{-1} \)
в. 133.08 ohm \( ^{-1} \mathrm{cm}^{2} \mathrm{mol}^{-1} \)
c. 37.7 ohm \( ^{-1} \mathrm{cm}^{2} \) mol \( ^{-1} \)
D. none of the above
| 1 |
Chemistry
|
\( -40^{\circ} \) on absolute scale is equal to
\( A \cdot \) ok
в. \( 233 k \)
\( c \cdot 273 k \)
D. 313K
| 3 |
Physics
|
Which of the following is the only nonmetal that appears as a liquid in its elemental form under standard
conditions?
A . \( C l \)
в. \( F \)
\( c . B r \)
\( D \)
| 1 |
Chemistry
|
\( A(-a, 0) ; B(a, 0) \) are fixed points. \( C \) is a point which divides internally \( A B \) in a constantly ration \( \tan \alpha . \) If \( A C \& C B \)
subtend equal angles at \( P, \) that the
equation of the locus of \( \boldsymbol{P} \) is \( \boldsymbol{x}^{2}+\boldsymbol{y}^{2}+ \)
\( 2 a x \sec 2 \alpha+a^{2}=0 \)
| 2 |
Maths
|
Draw structures of the following
derivatives.
(i) The 2,4 -dinitrophenylhydrazone of benzaldehyde
(ii) Cyclopropanone oxime
(iii) Acetaldehydedimethylacetal
(iv) The semicarbazone of
cyclobutanone
(v) The ethylene ketal of hexan-3-one
(vi) The methyl hemiacetal of formaldehyde
| 1 |
Chemistry
|
\( \mathbf{3} \times \mathbf{8}+\mathbf{6} \times \mathbf{1 1}+\mathbf{9} \times \mathbf{1 4}+\dots \)
| 2 |
Maths
|
Why are gaseous fuels better than the
solid and liquid ones?
| 1 |
Chemistry
|
Two identical particles each of mass \( M \)
and charge \( Q \) are placed a certain distance part. If they are in equilibrium under mutual gravitational and electric force then calculate the order of \( \frac{Q}{M} \) in
SI units.
| 3 |
Physics
|
Ferromagnetic ore properties are due to
A. filled inner sub-shells
B. vacant inner sub-shells
C . partially filled inner sub-shells
D. all the sub-shells equally filled
| 3 |
Physics
|
Examine if Mean value Theorem applies
to \( \boldsymbol{f}(\boldsymbol{x})=\boldsymbol{x}^{3}+\mathbf{3} \boldsymbol{x}^{2}-\mathbf{5} \boldsymbol{x} \) in the interval
[1,2]. If it does, then find the intermediate point whose existence is asserted by theorem.
A. Mean Value theorem is applicable and intermediate points are \( c=-3.55,1.55 \)
B. Mean Value theorem is not applicable
c. Mean Value theorem is applicable and intermediate points are \( c=3.55,-1.55 \)
D. none of these
| 2 |
Maths
|
If \( 2(a-8 \times 5)-2 \times 7=3 \times 1 \times a+ \)
\( \mathbf{7} \times \mathbf{4}-(\mathbf{8} \times \mathbf{1} \times \mathbf{a}-\mathbf{1}), \) find \( \boldsymbol{a} \)
A \( \cdot \frac{123}{8} \)
B. \( \frac{123}{7} \)
c. \( \frac{8}{123} \)
D. \( \frac{7}{123} \)
| 2 |
Maths
|
The velocity of water in river is
180kmh \( ^{-1} \) near the surface. If the river
is \( 5 \mathrm{m} \) deep, then the Shearing stress between the surface layer and the bottom layer is then(coefficient of
viscosity of water, \( \boldsymbol{\eta}=\mathbf{1 0}^{-\mathbf{3}} \boldsymbol{P a} \boldsymbol{s} \)
\( \mathbf{A} \cdot 10^{-2} N m^{-2} \)
B. \( 10^{-3} N m^{-2} \)
c. \( 10^{-4} N m^{-2} \)
D. \( 10^{-5} N m^{-2} \)
| 3 |
Physics
|
Calculate the standard oxidation
potentials of zinc electrode form the
following data. The EMF of the cell :
\( \boldsymbol{L} \boldsymbol{i}|\boldsymbol{L} \boldsymbol{i} \oplus(\mathbf{0 . 0 5} \boldsymbol{M}) \| \boldsymbol{A} \boldsymbol{n}| \boldsymbol{Z} \boldsymbol{n}^{2+}(\boldsymbol{0} . \boldsymbol{5} \boldsymbol{M}), \boldsymbol{E} \)
\( -3.045 V, \) is \( 2.35 \mathrm{V} \) at \( 25^{\circ} \mathrm{C} \)
| 1 |
Chemistry
|
The botanical term used for the
androecium in a flower of China rose
(Hibiscus rosa sinensis) is
A. Polyadelphous
B. Monadelphous
c. Diadelphous
D. Polyandrous
| 0 |
Biology
|
Acid buffer can be prepared by mixing solutions of:
A \( . \quad N a C l+N a O H \)
в. \( H_{2} S O_{4}+N a_{2} S O_{4} \)
c. \( N H_{4} O H+N H_{4} C l \)
D. \( C H_{3} C O O N a+C H_{3} C O O H \)
| 1 |
Chemistry
|
The distance between the parallel lines \( 3 \cos \theta+4 \sin \theta+\frac{5}{r}=0 \) and \( 6 \cos \theta+ \)
\( 8 \sin \theta+\frac{7}{r}=0 \) is
\( A \cdot \frac{3}{5} \)
в. \( \frac{3}{10} \)
\( c \cdot \frac{3}{20} \)
D.
| 2 |
Maths
|
A vessel of \( 125 \mathrm{cc} \) contains \( _{1}^{3} \mathrm{H}\left(t_{1 / 2}=\right. \) 12.3 \( y \) ) at \( 500 \mathrm{kPa} \) and \( 300 \mathrm{K} \). Find the
activity of the gas
A. \( 0.754 \mathrm{Ci} \)
в. 7.24 Сг
c. \( 72.4 \mathrm{Ci} \)
D. 724 С\( i \)
| 3 |
Physics
|
What is \( p K \) value of the complex
\( \left[\boldsymbol{P t C l}_{4}\right] \) if
\( \boldsymbol{P t}^{4+}+\boldsymbol{C l}^{-} \rightarrow[\boldsymbol{P t C l}]^{3+} \)
\( \boldsymbol{K}_{\mathbf{1}}=\mathbf{1 0}^{-\mathbf{2}} \)
\( [\boldsymbol{P t C l}]^{3+}+\boldsymbol{C l}^{-} \rightarrow\left[\boldsymbol{P t} C l_{2}\right]^{2+} \)
\( \boldsymbol{K}_{2}=\mathbf{1 0}^{-3} \)
\( \left[\boldsymbol{P t C l}_{2}\right]^{2+}+\boldsymbol{C l}^{-} \rightarrow\left[\boldsymbol{P t C l}_{3}\right]^{+} \)
\( \boldsymbol{K}_{3}=\mathbf{1 0}^{-4} \)
\( \left[\boldsymbol{P t C l}_{3}\right]^{+}+\boldsymbol{C l}^{-} \rightarrow\left[\boldsymbol{P t} \boldsymbol{C l}_{4}\right] \)
\( \boldsymbol{K}_{4}=\mathbf{1 0}^{-4} \)
| 1 |
Chemistry
|
A considerable part of the harmful \( \boldsymbol{U} \boldsymbol{V} \)
rays of the sum does not reach the
surface of the earth. This is because
high above the earth's atmosphere, there is a layer of
\( A \cdot O_{3} \)
в. \( C O_{2} \)
\( c \cdot S O_{2} \)
D. \( N O \)
| 1 |
Chemistry
|
An electric bulb of \( 250 c c \) was sealed off at
a pressure \( 10^{-3} \mathrm{mm} \) of \( \mathrm{Hg} \) and
temperature \( \$ \$ 27^{\wedge}\{0\} \$ \$ \) C. The number
of molecules present in the gas is
A \( \cdot 8.02 \times 10^{15} \)
В. \( 6.023 \times 10^{23} \)
c. \( 8.021 \times 10^{23} \)
D. \( 6 \times 10^{22} \)
| 3 |
Physics
|
Which of the following biologists is responsible for the binomial system for naming organisms that we use today?
A. Carolus Linnaeus
B. Whittaker
c. Theophrastus
D. Aristotle
| 0 |
Biology
|
In induction the charge induced in the near surface of a dielectric is:
A. equal and similar
B. greater and dissimilar
c. lesser and dissimilar
D. equal and dissimilar
| 3 |
Physics
|
The quantities \( A \) and \( B \) are related by
the relation \( \boldsymbol{A} / \boldsymbol{B}=\boldsymbol{m}, \) where \( \boldsymbol{m} \) is the
linear mass density and \( A \) is the force, the dimensions of \( B \) will be :
A. Same as that of pressure
B. Same as that of work
c. Same as that of momentum
D. Same as that of latent heat
| 3 |
Physics
|
Turpentine oil can be purified by:
A. steam distillation
B. vaccum distillation
C. fractional distillation
D. sublimation
| 1 |
Chemistry
|
A leakage begins in water tank at
position \( P \) as shown in the figure. The
initial gauge pressure pressure above
that of the atmosphere) at \( P \) was \( 5 x \)
\( 10^{5} N / m^{2} \). If the density of water is
1000kg/ \( m^{3} \) the initial velocity with
which water gushes out is:
A \( .3 .2 m s^{-1} \)
B. \( 32 m s^{-1} \)
\( \mathbf{c} \cdot 28 m s^{-1} \)
D. \( 2.8 m s^{-1} \)
| 3 |
Physics
|
Then equilibrium constant for the
reaction is:
For the following reactions, equilibrium constants are indicated on the arrow
\[
\begin{array}{l}
\mathrm{H}_{3} \mathrm{PO}_{4} \stackrel{K_{1}}{\Leftrightarrow} \mathrm{H}^{+}+\mathrm{H}_{2} \mathrm{PO}_{4} \\
\mathrm{H}_{2} \mathrm{PO}_{4}^{*} \Leftrightarrow \mathrm{H}^{*}+\mathrm{HPO}_{4}^{-2} \\
\mathrm{HPO}_{4}^{-2} \stackrel{K_{3}}{\Leftrightarrow} \mathrm{H}^{+}+\mathrm{PO}_{4}^{-3}
\end{array}
\]
Then equilibrium constant for the reaction
\[
\mathrm{H}_{3} \mathrm{PO}_{4} \Leftrightarrow \quad 3 \mathrm{H}^{+}+\mathrm{PO}_{4}^{3} \text { will be }
\]
\( \mathbf{A} \cdot K_{1}+K_{2}+K_{3} \)
B . \( \sqrt{K_{1} K_{2} K_{3}} \)
\( \mathbf{c} \cdot K_{1} \times K_{2} \times K_{3} \)
D. \( \frac{1}{K_{1} K_{2} K_{3}} \)
| 1 |
Chemistry
|
Which one of the following is the main cause of land degradation in Punjab?
A. Intensive cultivation
B. Deforestation
c. over irrigation
D. Overgrazing
| 1 |
Chemistry
|
A charge \( q \) is moving with a velocity \( (v) \) parallel to a magnetic field \( (B) \). Force on the charge due to magnetic field is:
A \( . q v B \)
в. \( q B / v \)
c. zero
D. \( B v / q \)
| 3 |
Physics
|
Milk of magnesia \( M g(O H)_{2} \) is a/an:
A . acid
B. antacid
c. alkal
D. rock salt
| 1 |
Chemistry
|
What is ratio of time periods \( \left(T_{1} / T_{2}\right) \) in
second orbit of hydrogen atom to third orbit of \( \boldsymbol{H} \boldsymbol{e}^{+} \) ion?
\( A \cdot \frac{8}{27} \)
в. \( \frac{32}{27} \)
c. \( \frac{27}{32} \)
D. \( \frac{27}{8} \)
| 1 |
Chemistry
|
The input AC voltage to the transformer
is \( 3 \mathrm{kV} \) and output is \( 100 \mathrm{V} \). Then:
A. The ratio of number of turns in the primary to secondary coil is 30: 1
B. The transformer is a step down transformer
c. The transformer is a step up transformert
D. Both 1 and 2
| 3 |
Physics
|
f \( x y=6, \) then minimum value of \( 2 x+ \)
\( 3 y \) is
| 2 |
Maths
|
Light with energy flux of \( 24 W m^{-2} \) is incident on a well polished disc of radius \( 3.5 \mathrm{cm} \) for one hour. The
momentum transferred to the disc is
A \( \cdot 1.1 \mu \mathrm{kgms}^{-1} \)
B. 2.2 \( \mu \mathrm{kgms}^{-1} \)
c. \( 3.3 \mu \mathrm{kgms}^{-1} \)
D. \( 4.4 \mu \mathrm{kgms}^{-1} \)
| 3 |
Physics
|
In electrtolysis of \( A l_{2} O_{3} \) by Hall-
Heroult process:
A. cryolite \( N a_{3}\left[A I F_{6}\right] \) lowers the melting point of \( A l_{2} O_{3} \) and increases its electrical conductivity
B. \( A l \) is obtained at cathode and probably \( C O_{2} \) at anode
c. both (a) and (b) are correct
D. none of the above is correct
| 1 |
Chemistry
|
A metal ball falls from a height of \( 1 \mathrm{m} \) on to a steel plate and jumps upto a height of \( 81 \mathrm{cm} . \) Find the coefficient of
restitution of the ball material.
A. 0.2
B. 9
\( c \cdot 0.9 \)
D. 90
| 3 |
Physics
|
Which of the following is not a polymer?
A . Ice
B. Starch
c. Protein
D. Cellulose
| 1 |
Chemistry
|
By the principle of Mathematical induction, prove that, for \( n \geq 1 \)
\[
\mathbf{1}^{2}+\mathbf{2}^{2}+\mathbf{3}^{2}+\cdots+\boldsymbol{n}^{2}>\frac{\boldsymbol{n}^{\mathbf{3}}}{\mathbf{3}}
\]
| 2 |
Maths
|
If \( a=-6 \) and \( b=7, \) then \( 4 a(3 b+5)+ \)
\( \mathbf{2 b}=\mathbf{?} \)
A . 638
в. 624
\( c .610 \)
D. -610
E . -638
| 2 |
Maths
|
What is interstitial fluid?
A. Fluid which removes waste
B. Fluid which dissolves nutrients
C. Fluid which occupies spaces between the cells
D. All of the above
| 0 |
Biology
|
Differentiate between veins and
arteries?
| 0 |
Biology
|
Male and female Cockroaches can be
distinguished externally through
A. Anal styles in male
B. Anal cerci in female
c. Anal style and antennae in females
D. Both B and C
| 0 |
Biology
|
Riya performs two set of experiments to
study the length of the foam formed which follows
Set \( I: \) She takes 10 ml of distilled water
in test tube " \( A^{\prime \prime} \) and adds \( 5-6 \) drops of
liquid soap in it and shakes the test tube vigorously. Set \( I I: \) She takes 10 ml of distilled
water in a test tube \( ^{\prime \prime} A^{\prime \prime} \) and adds \( 5-6 \)
drops of liquid soap with half spoonful
of \( C a S O 4 \) in it and shakes the tube.
Write your observation and reason
| 1 |
Chemistry
|
The binding energy of electrons in a metal is \( 193 \mathrm{kJ} \mathrm{mol}^{-1} \). The threshold
frequency of the metal is:
A. \( 8.83 \times 10^{14} \mathrm{s}^{-1} \)
B. 4.83 \( \times 10^{14} \mathrm{s}^{-1} \)
c. \( 5.83 \times 10^{14} \mathrm{s}^{-1} \)
D. 6.83 \( \times 10^{14} \mathrm{s}^{-1} \)
| 1 |
Chemistry
|
By selling a watch for \( R s .1275 \), Javed
lost \( 15 \% \). At what price should he sell to
make a profit of \( 10 \% ? \)
| 2 |
Maths
|
Write a value of
\( \int \sqrt{9+x^{2}} d x \)
| 2 |
Maths
|
Who discovered X-rays?
A. Michael Faraday
B. Albert Einstein
C. W.K. Roentgen
D. J.J. Thomson
| 3 |
Physics
|
Consider the plane \( (\boldsymbol{x}, \boldsymbol{y}, \boldsymbol{z})= \)
\( (0,1,1)+\lambda(1,-1,1)+\mu(2,-1,0) . \) The
distance of this plane from the origin is:
A \( \cdot \frac{1}{3} \)
B. \( \frac{\sqrt{3}}{2} \)
\( c \cdot \sqrt{\frac{3}{2}} \)
D. \( \frac{2}{\sqrt{3}} \)
| 2 |
Maths
|
In photosynthesis in plants, \( \boldsymbol{H}_{2} \boldsymbol{O} \) and
\( C O_{2} \) react in presence of light and chlorophyll to give carbohydrate and oxygen.When the carbohydrate is burnt in air, the gases produced are:
A. \( C O_{2}+H_{2} \)
в. \( C O_{2}+C O \)
c. \( C O_{2}+H_{2} O \)
D. \( C O_{2}+O_{2} \)
| 1 |
Chemistry
|
A nucleus \( X \) initially at rest, undergoes alpha decay according to the equation
\[
\mathbf{9 2}^{\boldsymbol{X}^{A}} \rightarrow \boldsymbol{Z}^{Y^{228}}+\boldsymbol{\alpha}
\]
Then, the values of \( A \) and \( Z \) are
A .94,230
в. 232,90
c. 190,32
D. 230,94
| 3 |
Physics
|
In a cathode ray oscillograph, the focusing of beam on the screen is achieved by
A. Convex lens
B. Magnetic field
c. Electric potential
D. All of these
| 3 |
Physics
|
Argon and calcium are isobar. Why?
A. Both have same atomic number equal to 40
B. Both have different atomic mass
C. Both have same atomic mass equal to 40
D. None of above
| 1 |
Chemistry
|
An iron block of mass \( 2 k g \), falls from a
height of \( 10 m . \) After colliding with the ground it loses \( 25 \% \) energy to surroundings and rest is gained as heat. Then find the temperature rise of the block. (Take sp. heat of iron
\( \left.470 J / k g^{\circ} C\right) \)
A. \( 0.53^{\circ} \) C C \( C \) ?
B. \( 0.053^{\circ} \mathrm{C} \)
c. \( 0.159^{\circ} \mathrm{C} \)
D. \( 0.212^{\circ} \mathrm{C} \)
| 3 |
Physics
|
The sum of the measures of interior
angles of a polygon of \( n \) sides is equal to
A. \( 2 n \) right angles
B. \( (2 n-2) \) right angles
c. \( 2(n-2) \) right angles
D. \( 2(n-4) \) right angles
| 2 |
Maths
|
Figure shows a full wave bridge rectifier
circuit. The input a.c. is connected
across
\( A \cdot A \) and \( B \)
B. A and C
C. \( B \) and \( D \)
D. \( B \) and \( C \)
| 3 |
Physics
|
The correct order of increasing \( s \) character (in percentage) in the hybrid orbitals of the given molecules/ions is (assume all hybrid orbitals are exactly equivalent):
\( \boldsymbol{C H}_{2} \quad \boldsymbol{X} \boldsymbol{e F}_{4} \quad \boldsymbol{B r} \boldsymbol{F}_{3} \quad \boldsymbol{N C l}_{3} \quad: \boldsymbol{C C l}_{2} \)
\( \mathbf{A} \cdot\|<\| \mathbf{I}<\mid V<1=\mathbf{V} \)
B. \( |>V>|||>|V>| \mid \)
\( c \cdot\|1<\|<1<V<1 V \)
D. \( \|<I V<\| 1<1<V \)
| 1 |
Chemistry
|
What are micronutrients? Write two
examples of it?
| 0 |
Biology
|
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