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Q Type your question
custom-built capacitor. The magnitude
of charge on each plate for each separate voltage is recorded. The graph shows charge in micro-coulombs
plotted against potential difference. Use the graph to answer the following two questions. What is the approximate capacitance,
\( C, \) of this capacitor?
And what is the electric potential operating range during which this device properly acts like a capacitor?
A. \( C=60 \) micro-farads; Operating Range: \( 0-100 v \)
B. \( C=60 \) micro-farads; Operating Range: \( 0-40 v \)
c. \( C=2700 \) micro-farads; operating Range: \( 60-100 v \)
D. \( C=40 \) micro-farads; Operating Range: \( 0-40 v \)
E. \( C=0.017 \) micro-farads; operating Range: \( 0-40 \) | 3 | Physics |
The largest number of the three
consecutive number is \( x+1 \) then the
smallest number is
\( \mathbf{A} \cdot x+2 \)
B. \( x+1 \)
\( c \)
D. \( x-1 \) | 2 | Maths |
When an air bubble of radius \( r \) rises
from the bottom to the surface of a lake, the radius becomes \( \frac{5 r}{4} . \) Taking the
atmospheric pressure to be equal to 10 \( m \) height of water column, the depth
of the lake would approximately be (ignore the surface tension and the effect of temperature):
A . \( 11.2 m \)
B. \( 8.7 m \)
\( \mathbf{c} .9 .5 m \)
D. \( 10.5 \mathrm{m} \) | 3 | Physics |
Find the total surface area of a cuboid
its length, breadth and height are \( 7 \mathrm{cm} \) \( 5 \mathrm{cm}, \) and \( 10 \mathrm{cm} \) respectively. | 2 | Maths |
Glyptal or alkyl resin is a polymer of:
A. ethylene glycol and phthalic acid
B. ethylene and phthalic acid
c. phthalic acid and acetylene | 1 | Chemistry |
A black bear that eats berries and fish
would be classified as
A. A producer
B. An omnivore
c. A carnivore
D. An herbivore
E. An autotroph | 0 | Biology |
Calculate the potential at a point due to a charge of \( 3 \times 10^{-9} C \) located \( 9 \times \)
\( 10^{-2} m \) away from it. | 3 | Physics |
When you heat a bowl of water, we can observe that water starts circulating. This demonstrates:
A. conduction
B. convection
c. radiation
D. none | 3 | Physics |
Among the following which is used to control the rate of reaction in nuclear
fission reactions?
A. water
B. Heavy water
c. Cadmium
D. Graphite | 3 | Physics |
One mole of an ideal gas requires 207 J heat to raise the temperature by 10 K when heated at constant pressure. If the same gas is heated at constant
volume to raise the temperature by the same \( 10 \mathrm{K} \), the heat required is
A . \( 198.7 J \)
B. \( 29 J \)
c. \( 215.3 J \)
D. 124J | 1 | Chemistry |
Darwins finches are an excellent
example of
A. Adaptive radiation
B. Seasonal migration
c. Brood parasitism
D. connecting links | 0 | Biology |
Blue colour of wter in sea is due to
A. refraction of blue light by impurities
B. refraction blue sky by water
C. scattering of light by water
D. None of the above | 3 | Physics |
Figure below shows a portion of an electric circuit with the currents in
ampere and their directions. The
magnitude and direction of the current
in the portion \( \boldsymbol{P} \boldsymbol{Q} \) is:
\( A \cdot 0 A \)
B. \( 3 A \) from \( P \) to \( Q \)
\( c .4 A \) from \( Q \) to \( P \)
D. \( 6 A \) from \( Q \) to \( P \) | 3 | Physics |
State the use of aluminum | 1 | Chemistry |
Bioenergy is obtained from energy stored in biomass.
A. chemical
B. heat
c. nuclear
D. thermal | 3 | Physics |
The molecular weight of \( O_{2} \) and \( N_{2} \) are
32 and 28 respectively. At \( 15^{0} C \), the
pressure of \( 1 \mathrm{gm} \mathrm{O}_{2} \) will be the same as
that of \( 1 \mathrm{gm} N_{2} \) in the same bottle at the temperature?
A . \( -21^{0} C \)
B. \( -13^{0} C \)
\( \mathbf{c} \cdot 15^{0} C \)
D. \( 56.4^{0} V \) | 1 | Chemistry |
The growth of which group of bacteria will be slow in comparison to the others?
A. Obligate aerobes
B. obligate anaerobes
c. Facultative aerobes
D. Facultative anaerobes | 0 | Biology |
Solve the differential equation \( \boldsymbol{x}+ \)
\( y \frac{d y}{d x}=2 y \) | 2 | Maths |
Find the electric flux crossing the wire frame \( A B C D \) of length \( I, \) width \( b, \) and
center at a distance \( 0 P=d \) from an
infinite line of charge with linear charge
density \( \lambda \). Consider that the plane of the
frame is perpendicular to the line OP
Fig.
A \( \cdot \frac{2 N}{\pi \varepsilon_{0}} \tan ^{-1}\left(\frac{b}{2 d}\right) \)
B. \( \frac{N}{\pi \varepsilon_{0}} \tan ^{-1}\left(\frac{b}{2 d}\right) \)
c. \( \frac{3 N}{\pi \varepsilon_{0}} \tan ^{-1}\left(\frac{7 b}{2 d}\right) \)
D. \( \frac{N}{2 \pi \varepsilon_{0}} \tan ^{-1}\left(\frac{b}{2 d}\right) \) | 3 | Physics |
In which of the following solution, \( A g C l \)
has minimum solubility:
A. \( 0.05 M A g N O_{3} \)
в. \( 0.01 M \) Са \( C l_{2} \)
c. \( 0.01 M \) NaCl
D. \( 0.01 M N H_{4} O H \) | 1 | Chemistry |
The gravitational potential at height \( h \) above the earth's surface is \( -5.12 \times \)
\( 10^{7} \mathrm{J} / \mathrm{kg} \) and acceleration due to gravity
at this point is \( 6.4 m s^{-2} . \) If radius of the
earth is \( 6400 \mathrm{km} \), the value of h is :
A. \( 1200 \mathrm{km} \)
B. 1600 km
c. \( 1800 \mathrm{km} \)
D. 2400 km | 3 | Physics |
Two lenses shown are illuminated by a
beam of parallel light from the left. Lens
\( B \) is then moved slowly toward lens \( A \)
The beam emerging from lens \( B \) is
A. Always diverging
B. Initially parallel and then diverginggg
c. Always paralle!
D. Initially converging and then parallel | 3 | Physics |
n fig sides QP and RQ of \( \Delta \) PQR are produced to the points \( \mathrm{S} \) and \( \mathrm{T} \)
respectively. If \( \angle S P R=105^{\circ} \angle P Q T= \)
\( 110^{\circ} \) then find \( \angle P R Q \)
\( A \cdot 35 \)
B. \( 70^{\circ} \)
\( c .105 \)
0.140 | 2 | Maths |
Complete the equations given below.
\( N a_{2} O+H_{2} O \rightarrow \) | 1 | Chemistry |
A telephone cable at a place has four long straight horizontal wires carrying a current of \( 1.0 \mathrm{A} \) in the same direction
east to west. The earth's magnetic field at the place is \( 0.39 \mathrm{G}, \) and the angle of dip is 35 ?35 ? . The magnetic declination is nearly zero. What are the resultant magnetic fields at points \( 4.0 \mathrm{cm} \) below the cable? | 3 | Physics |
Some medicines are more effective in
the colloidal form because of:
A. the charged colloidal particles present in it
B. the large surface area and easy assimilation
C . precipitation of medicine in the blood
D. the stabilisation of medicine in colloidal form | 1 | Chemistry |
Consider quadratic equation \( a x^{2}+ \) \( (2-a) x-2=0, \) where \( a \in R \)
If exactly one root is negative, then the
range of \( a^{2}+2 a+5 \) is
\( A \cdot[4, \infty) \)
B \( \cdot[-2, \infty) \)
c. \( (-\infty, 4] \)
\( D \cdot(5, \infty) \) | 2 | Maths |
A wave has wavelength \( 50 A^{\circ} . \) State the
speed of wave in vacuum.
A. \( 3 \times 10^{8} \mathrm{ms}^{-1} \)
В \( \ldots 3 \times 10^{8} m s^{-1} \)
\( \mathbf{c} \cdot\left\langle 3 \times 10^{8} m s^{-1}\right. \)
D. Insufficient information | 3 | Physics |
\( (a) C H_{3} C O N H_{2}+K O H \longrightarrow \)
\( (b) C H_{3} C O O H+s o d a l i m e \longrightarrow \)
\( (c) C H_{3} C O O A g+B r_{2} \longrightarrow \)
All the three reactions show similarity
in:
A. Descending of carbon atoms
B. Ascending of carbon atoms
c. Both the above
D. None of above | 1 | Chemistry |
\( 56 g \) of nitrogen and \( 8 g \) of hydrogen gas are heated in a closed vessel. At
equilibrium \( 34 g \) of ammonia is present. The equilibrium number of moles of nitrogen, hydrogen and ammonia are respectively:
\( \mathbf{A} \cdot 1,2,2 \)
в. 2,2,1
c. 1,1,2
D. 2,1,2 | 1 | Chemistry |
In which of the following pair, both the substances are chemically same?
A. Milk of lime and lime water
B. Dead burnt plaster and gypsumm
C. Alumina and gypsum
D. Gypsum and Plaster of Paris | 1 | Chemistry |
The function \( \boldsymbol{f}:[\mathbf{2}, \infty) \rightarrow \boldsymbol{Y} \) defined by
\( f(x)=x^{2}-4 x+5 \) is both one-one \( \& \)
onto if:
A \( . Y=R \)
В. \( Y=[1, \infty) \)
c. \( Y=[4, \infty) \)
D. \( Y=[5, \infty) \) | 2 | Maths |
Which of the following sources gives best monochromic light?
A. A candle
B. A bulb
c. A mercury tube
D. A laser | 3 | Physics |
Fuel formed under the earths surface by the decomposition of organic matter is:
A. organic fuel
B. bio-gas
c. fossil fuel
D. underground fuel | 3 | Physics |
If the points \( (k, 2 k),(3 k, 3 k) \) and (3,1) are collinear then the value of \( k \) is
A \( \cdot \frac{7}{9} \)
B. \( \frac{2}{3} \)
c. \( \frac{-2}{3} \)
D. \( \frac{-1}{3} \) | 2 | Maths |
The concentration of the reactant \( R \) at
different times are given below. Find the average rate during different time intervals.
\( t(\sec ) \quad[R](\operatorname{mol} / L) \) )
0.150
10
\[
0.100
\]
20 0.050
A \( . . .005 \mathrm{mol} \mathrm{L}^{-1} \mathrm{s}^{-1}, .005 \mathrm{mol} \mathrm{L}^{-1} \mathrm{s}^{-1} \)
B . .005molL" \( s^{-1}, .0025 \) molL\( ^{-1} s^{-1} \)
c. \( .0025 \mathrm{molL}^{-1} \mathrm{s}^{-1} . .005 \mathrm{molL}^{-1} \mathrm{s}^{-1} \)
D. None of these | 1 | Chemistry |
Decomposition of \( \boldsymbol{H}_{2} \boldsymbol{O}_{2} \) is retarded
by
A . Acetanilide
в. \( M n O_{2} \)
c. zinc
D. finely divided metal | 1 | Chemistry |
A light and a heavy body have equal kinetic energies. The light body has greater momentum.
A. True
B. False | 3 | Physics |
II
sodium bicarbonate solution?
This question has multiple correct options
\( A \)
B.
\( c \)
\( D \) | 1 | Chemistry |
A particle is thrown upwards with velocity \( 2 \mathrm{m} / \mathrm{s}, \) the velocity of particle after 2 s is :
A. \( 17.6 m / s \)
B. \( -17.6 \mathrm{m} / \mathrm{s} \)
c. \( 19.6 m / s \)
D. \( -19.6 m / s \) | 3 | Physics |
What will be the correct gene expression
pathway?
A. Gene-mRNA- transcription-translation-protein
B. Transcription-Gene-translation-mRNA-protein
C. Gene-transcription-mRNA-translation-protein
D. Gene-translation-mRNA-transcription-protein | 0 | Biology |
A charged body is brought near a positively charged gold leaf electroscope. The divergence of its leaves increases. If the same body is brought near a negatively charged gold leaf electroscope, what will be the effect
on divergence of its leaves? | 3 | Physics |
Fore-brain is centre of intelligence, control of movements, hearing, smell and sight.
A. True
B. False | 0 | Biology |
35
has a non-terminating decimal
\( \overline{\mathbf{5 0}} \)
expansion
A. True
B. False | 2 | Maths |
Explain the formation of root nodules in legumes. | 0 | Biology |
The active mass of \( 7.0 \mathrm{g} \) of nitrogen in a
\( 2.0 L \) container would be:
A . 0.25
B. 0.125
\( c .0 .5 \)
D. 14.0 | 1 | Chemistry |
The Sl unit of radioactivity is :
A . Becquerrel
B. Curie
c. Rutherford
D. None of these | 3 | Physics |
Chief anatomical feature of
Cucurbitaceae family is
A. Bicollateral vascular bundles
B. Conjoint vascular bundle
c. radial vascular bundle
D. None of the above | 0 | Biology |
How is the angle of emergence \( i_{2} \)
related to the angle of incidence \( i_{1} ? \)
в. \( i_{2}<i_{1} \)
\( \mathbf{c} \cdot i_{2}>i_{1} \)
D. can't say | 3 | Physics |
Within a spherical charge distribution of charge density \( \rho(r), \) N equipotential
surfaces of potential \( V_{0}, V_{0}+ \)
\( \boldsymbol{\Delta} \boldsymbol{V}, \boldsymbol{V}_{0}+\boldsymbol{2} \boldsymbol{\Delta} \boldsymbol{V}, \ldots . ., \boldsymbol{V}_{0}+ \)
\( N \Delta V(\Delta V>0), \) are drawn and have
increasing radii \( r_{0}, r_{1}, r_{2}, \dots . . r_{N} \)
respectively. If the difference in the radii of the surfaces is constant for all values
of \( V_{0} \) and \( \Delta V \) then :
A \( \cdot \rho(r)= \) constant
B. \( \rho(r) \propto \frac{1}{r^{2}} \)
c. \( \rho(r) \propto \frac{1}{r} \)
D. \( \rho(r) \propto 1 \) | 3 | Physics |
In steady horizontal flow:
A. the pressure is greatest where the speed is leas
B. the pressure is independent of speed
C. the pressure is least where the speed is least
D. (a) and
(c) are correct | 3 | Physics |
We move our hands while walking for
A. Fast movement
B. Balancing
c. Increasing blood circulation
D. Relieving tension | 0 | Biology |
Which of the following is strongest conjugate base
в. \( \mathrm{HCO}_{3} \)
\( c . P \)
D. HSO | 1 | Chemistry |
Evaluate \( \int_{1}^{3}(2 x+3) d x \) | 2 | Maths |
A flat plate is moving normal to its plane through a gas under the action of a constant force \( \boldsymbol{F} \). The gas is kept at a
very low pressure. The speed of the plate
\( v \) is much less than the average speed
\( u \) of the gas molecules. Which of the
following options is/are true? This question has multiple correct options
A. The resistive force experienced by the plate is proportional to \( v \)
B. At a later time the external force \( F \) balances the resistive force
C. The plate will continue to move with constant non-zero acceleration, at all times
D. The pressure difference between the leading and trailing faces of the plate is proportional to \( u v \) | 3 | Physics |
Name the family to which each of the following belongs
(i) Pisum
(ii) Onion
(iii) Potato. | 0 | Biology |
Which of the following is paramagnetic
in nature?
\( A \cdot N_{2} O_{4} \)
B. \( \mathrm{N}_{2} \)
c. No
D. \( \mathrm{N}_{2} \mathrm{O}_{3} \) | 1 | Chemistry |
Which of the following is the most stable oxidation state of aluminium?
A . -1
B. +1
\( c \cdot+2 \)
D. +3 | 1 | Chemistry |
The volume of air that can be inhaled
following a maximal exhalation includes IRV, TV and ERV is known as
the
A. Functional capacity
B. Lung capacity
c. vital capacity
D. Respiratory capacity | 0 | Biology |
What is the square root of 506.25 using long division method?
A . 22.
B. 21.4
c. 23.4
D. 25.3 | 2 | Maths |
What is the formula of calamine? | 1 | Chemistry |
The angular velocity of the earth with
which it has to rotate so that the
acceleration due to gravity on \( 60^{\circ} \)
latitude becomes zero is
A . \( 2.5 \times 10^{-3} r a d / s \)
В. \( 1.5 \times 10^{-3} r a d / s \)
C \( .4 .5 \times 10^{-3} \mathrm{rad} / \mathrm{s} \)
D. \( 0.5 \times 10^{-3} \mathrm{rad} / \mathrm{s} \) | 3 | Physics |
A shopkeeper buys 15 identical articles
for Rs. 840 and pays sales-tax at the rate of \( 8 \% . \) He sells 6 of these articles at
Rs. 65 each and charges sales-tax at the same rate. Calculate the VAT paid by the
shopkeeper against the sale of these six articles.
A. Rs. 2.5 5
B. Rs.4.32
c. Rs. 7.52
D. Rs. 9.55 | 2 | Maths |
Appliances based on heating effect of current work on
A. only A.c.
B. only D.C.
c. both A.c. and D.c.
D. none of these | 3 | Physics |
An earthquake is caused by
A. shaking of the earth
B. strain building up in the tectonic plates
C . plates slipping along the fault lines
D. all of the above | 3 | Physics |
In Young's double slit experiment, the intensity at the center of screen is:
A. equal to the intensity of each source
B. equal to twice the intensity of each source
c. half the intensity of each source
D. four times the intensity of each source | 3 | Physics |
Which of the following mixtures can act as a buffer?
This question has multiple correct options
\( \mathbf{A} \cdot N a O H+H C O O N a \)
B. Borax + boric acid
c. \( N a H_{2} P O_{4}+N a_{2} P O_{4} \)
D. \( N H_{4} C l+N H_{4} O H \) | 1 | Chemistry |
A 220 volt input is supplied to a transformer. The output circuit of
2.0 ampere at 440 volts. If the efficiency of the transformer is \( 80 \% \), the current drawn by the primary windings of the transformer is | 3 | Physics |
An equilibrium mixture in a vessel of capacity 100 litre contain
1 mol \( N_{2}, 2 \) mol \( O_{2} \) and
3 mol NO.No. of moles of \( 0_{2} \) to be
added so that at new equilibrium the conc. of NO is found to be 0.04 mol/lit :
A \( .(101 / 18) \)
B. (101/9)
c. (202/9)
D. None of these | 1 | Chemistry |
Mass-flow hypothesis is also known as
A. Pressure flow hypothesis
B. Accelerated diffusion theory
c. conventional flow hypothesis
D. None of the above | 0 | Biology |
The dimension of \( 1 / 2 \varepsilon_{o} E^{2}\left(\varepsilon_{o}\right. \)
permittivity of free space; E: electric field) is?
A . \( M L T^{-} \)
В. \( M L^{2} T^{-2} \)
c. \( M L^{-1} T^{-2} \)
D. \( M L^{2} T^{-1} \) | 3 | Physics |
Without expanding, show that the value
of the following determinant is zero:
\( \left|\begin{array}{ccc}a & b & c \\ a+2 x & b+2 y & c+2 z \\ x & y & z\end{array}\right| \) | 2 | Maths |
In which one of the following pairs the radius of the second species is greater than that of the first?
A. \( N a, M g \)
B. \( O^{2-}, N^{3-} \)
c. \( L i^{+}, B e^{2+} \)
D. \( B a^{2+}, S r^{2+} \) | 1 | Chemistry |
Root pressure is measured by
A. Potometer
B. Barometer
c. Manometer
D. Auxanometer | 0 | Biology |
What are the conditions for a chemical
change?
A. Combining particles are in close contact.
B. Energy is suppliedd
c. Both A and B
D. None of these. | 1 | Chemistry |
The volumes of the two spheres are in
the ratio \( 64: 27 . \) Find the ratio of their
surface areas.
\( \mathbf{A} \cdot 16: 9 \)
B. 9: 16
c. 4: 3
D. 3: 4 | 2 | Maths |
As the distance of the planet from the sun increases, the period of revolution decreases.
A. True
B. False | 3 | Physics |
Write the mechanism of hydration of ethene to yield ethanol | 1 | Chemistry |
The most efficient engine is?
A . Petrol
B. Electric
c. Steam
D. Diesel | 3 | Physics |
In which ratio the plane \( Y Z \) divides the
lines joining the points (2,1,2) and (-6,3,4) | 2 | Maths |
Out of (ref. image), which one is more reactive towards nucleophilic substitution reaction and why?
and | 1 | Chemistry |
If \( x^{y}=e^{x-y}, \) show that \( \frac{d y}{d x}= \) \( \frac{\boldsymbol{y} \log \boldsymbol{x}}{\boldsymbol{x}(\log \boldsymbol{x}+\mathbf{1})} \) | 2 | Maths |
Oxygen molecule is paramagnetic in nature. What is the paramagnetic
content in terms of the magnetic
moment in \( O_{2}^{-} ? \)
A . 1.732
B. 3
c. 1.5
D. 2.5 | 1 | Chemistry |
Dimension of temperature coefficient \( \alpha \)
is | 3 | Physics |
Prove that the points \( \boldsymbol{A}(\boldsymbol{a}, \boldsymbol{b}+ \)
\( c), B(b, c+a) \) and \( C(c, a+b) \) are
collinear (By determinant) | 3 | Physics |
The chemical reactions involved in
the extraction of metallic silver from
argentite is -
\( \mathbf{2} N \boldsymbol{a}\left[\boldsymbol{A} \boldsymbol{g}(\boldsymbol{C} \boldsymbol{N})_{2}\right]+\boldsymbol{Z} \boldsymbol{n} \rightarrow \)
\( \boldsymbol{N} \boldsymbol{a}_{2}\left[\boldsymbol{Z} \boldsymbol{n}(\boldsymbol{C} \boldsymbol{N})_{4}\right]+\boldsymbol{2} \boldsymbol{A} \boldsymbol{g} \downarrow \)
If the statement is true enter 1 else 0 . | 1 | Chemistry |
If, in the reaction \( N_{2} O_{4}(g) \rightleftharpoons 2 N O_{2}(g) \)
\( x \) is the part of \( N_{2} O_{4} \) which dissociates,
then the number of molecules at
equilibrium will be:
A
B. 3
\( c \cdot(1+x) \)
D. \( (1+x)^{2} \) | 1 | Chemistry |
The equation of image of the line
\( \frac{x-1}{9}=\frac{y-2}{-1}=\frac{z+3}{-3} \) in the plane
\( 3 x-3 y+10 z=26 \) is
\( ^{\text {A } \cdot} \frac{x-4}{9}=\frac{y+1}{-1}=\frac{z-7}{3} \)
B. \( \frac{x-4}{9}=\frac{y+1}{-1}=\frac{z-7}{-3} \)
c. \( \frac{x+4}{9}=\frac{y+1}{-1}=\frac{z-7}{-3} \)
\( \frac{x-4}{9}=\frac{y-1}{1}=\frac{z-7}{-3} \) | 2 | Maths |
Which of the following contain \( \boldsymbol{P}-\boldsymbol{P} \)
bond?
A \( \cdot P_{2} O_{7}^{4} \)
B. \( P_{2} O_{6}^{2-} \)
\( \mathrm{c} \cdot P_{3} O_{9}^{3-} \)
D. \( P_{2} O_{6}^{4-} \) | 1 | Chemistry |
Which of the following is true regarding how increasing population helps in depletion of water table?
A. Increasing population creates demand for construction of houses, shops, offices, roads and pavements
B. This decreases the open areas like parks, and playgrounds.
c. This, in turn, decreases the seepage of rainwater into the ground
D. All of the above | 0 | Biology |
\( f\left|\begin{array}{lll}\boldsymbol{x}_{1} & \boldsymbol{y}_{1} & \mathbf{1} \\ \boldsymbol{x}_{2} & \boldsymbol{y}_{2} & \mathbf{1} \\ \boldsymbol{x}_{3} & \boldsymbol{y}_{3} & 1\end{array}\right|=\left|\begin{array}{lll}\boldsymbol{a}_{1} & \boldsymbol{b}_{1} & \mathbf{1} \\ \boldsymbol{a}_{2} & \boldsymbol{b}_{2} & \mathbf{1} \\ \boldsymbol{a}_{3} & \boldsymbol{b}_{3} & 1\end{array}\right| \), 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 \( \left(a_{1}, b_{1}\right) \)
\( \left(a_{2}, b_{2}\right),\left(a_{3}, b_{3}\right) \) must be congruent
A. True
B. False | 2 | Maths |
State Ampere's circuital law and arrive
at the expression for the magnetic field
near a straight infinite current carrying wire. | 3 | Physics |
What will be the enthalpy of combustion of carbon to produce carbon monoxide on the basis of data given below?
\( \boldsymbol{C}_{(s)}+\boldsymbol{O}_{2(\boldsymbol{g})} \rightarrow \boldsymbol{C} \boldsymbol{O}_{2(\boldsymbol{g})} \quad \boldsymbol{\Delta} \boldsymbol{H}= \)
\( -393.4 k J \)
\( \boldsymbol{C O}_{(\boldsymbol{g})}+\frac{1}{2} \boldsymbol{O}_{2(\boldsymbol{g})} \rightarrow \boldsymbol{C} \boldsymbol{O}_{2(\boldsymbol{g})} \quad \boldsymbol{\Delta} \boldsymbol{H}= \)
\( -283.0 k J \)
A \( .+676.4 \mathrm{kJ} \)
B . - 676.4 kJ
c. -110.4 k
D. \( +110.4 \mathrm{kJ} \) | 1 | Chemistry |
Two identical particles of mass \( 1 \mathrm{kg} \) experience a gravitational force of 10N between them . The distance between
them is r. If the same setup is put in water (refractive index \( =1.5 \) ), how will
their gravitational force change
A. The gravitational force will reduce to 1 N
B. The gravitational force remains constant
c. The gravitational force becomes \( 20 / 3 \mathrm{N} \)
D. The gravitational force becomes 15 N | 3 | Physics |
A rectangular loop PQRS, is being pulled
with constant speed into a uniform
transverse magnetic fieldby a force (as shown). E.m.f. induced in side PS
and potential difference between points
Pand S respectively are (Resistance of the \( \operatorname{loop}=r) \)
A \( \cdot \) zero, \( \frac{F r}{B \ell} \)
B. Zero, zero
c. zero, \( \frac{F r}{6 B \ell} \)
D. \( \frac{F r}{6 B \ell}, \frac{F r}{6 B \ell} \) | 3 | Physics |
Displacement of a body is given by \( x= \)
\( \mathbf{5}+\mathbf{3} t+\mathbf{2} t^{2} . \) The value instantaneous
acceleration is:
A . 4 units
B. 6 units
c. 5 units
D. 2 units | 3 | Physics |
Unlike phenol, 2,4-dinitrophenol is
soluble in sodium carbonate solution in
water because?
A. presence of two - \( N O_{2} \) groups in the ring makes 2,4 dinitrophenol a stronger acid than phenol.
B. presence of two - \( N O_{2} \) groups in the ring makes 2,4 dinitrophenol a weaker acid than phenol.
C. presence of two \( -N O_{2} \) groups make the hydrogen bonding easier, making 2, 4-dinitrophenol soluble
D. nitro group reacts with \( N a_{2} C O_{3} \) while \( -O H \) group does not | 1 | Chemistry |
Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagents.
(i) PhMgBr and then \( \boldsymbol{H}_{3} \boldsymbol{O}^{+} \)
(ii) Tollens reagent
(iii) Semicarbazide and weak acid
(iv) Excess ethanol and acid
(v) Zinc amalgam and dilute
hydrochloric acid | 1 | Chemistry |
What is represented by the following
sequence?
Cyanobacteria, Crustose lichens, Foliose lichens, Mosses, Shrub, Dicotyledenous plants.
A. Genetic drift
B. Eltonian pyramid
c. Ecological succesion
D. Phylogenetic relationship | 0 | Biology |
If vectors \( (x-2) \vec{a}+\vec{b} \) and
\( (2 x+1) \vec{a}-\vec{b} \) are parallel then \( x \)
A \( \cdot 1 / 3 \)
B. 3
\( c \cdot-3 \)
D. \( -1 / 3 \) | 2 | Maths |
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