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A planet is revolving in an elliptical orbit around the sun. Its closest
distance from the sun is \( r \) and the
farthest distance is \( R \). If the velocity of
the planet nearest to the sun be \( v \) and
that farthest away from the sun be \( \boldsymbol{V} \)
then \( \boldsymbol{v} / \boldsymbol{V} \) is :
A \( \cdot \frac{R^{2}}{r^{2}} \)
B. \( \frac{r^{2}}{R^{2}} \)
\( \mathbf{c} \cdot \frac{R}{r} \)
D. \( \frac{r}{R} \) | 3 | Physics |
A reversible reaction is carried out at
\( 500 \mathrm{K} \) where its equilibrium constant is unity. If \( \Delta H \) at \( 500 \mathrm{K} \) is \( 4.0 k J, \) the
value of \( \Delta S^{o} \) is | 1 | Chemistry |
Mark the correct option
A. The state of motion of an object is described by its speed only
B. Many a time application of force does not result in a change in the state of motion of an object
C. By sitting on a bicycle seat force is applied to the spring fixed to the seat of a bicycle
D. All of the above | 3 | Physics |
Assertion
Degree of hydrolysis and \( p H \) of a salt
\( \operatorname{say} N H_{4} C N \) is independent of
concentration of \( \boldsymbol{N} \boldsymbol{H}_{4} \boldsymbol{C} \boldsymbol{N} \)
Reason
The solution of \( N H_{4} C N \) in water has
\( \boldsymbol{p} \boldsymbol{H} \) slightly greater than \( \mathbf{7} \)
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 |
\( |\vec{a}+\vec{b}|^{2}-|\vec{a}-\vec{b}|^{2} \) is equal to
\( \mathbf{A} \cdot 4|\vec{a}||\vec{b}| \sin (\theta) \)
B . \( 4|\vec{a}||\vec{a}| \sin (\theta) \)
\( \mathbf{c} \cdot \mathbf{4}|\vec{a}||\vec{b}| \cos (\theta) \)
\( \mathbf{D} \cdot \mathbf{4}|\vec{a}||\vec{b}| \tan (\theta) \) | 2 | Maths |
Which of the following fluorides of xenon is impossible?
A. \( X e F_{2} \)
в. \( X e F_{3} \)
c. \( x e F_{4} \)
D. \( X e F_{6} \) | 1 | Chemistry |
The molecular weights of \( O_{2} \) and \( N_{2} \) are
32 and 28 respectively. At \( 15^{0} \mathrm{C} \), 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. \( -21^{0} \mathrm{C} \)
B. \( -13^{0} \mathrm{C} \)
\( \mathrm{c} \cdot 15^{\circ} \mathrm{C} \)
D. \( 56.4^{0} \mathrm{V} \) | 1 | Chemistry |
The earliest man-like primate was
A. Ramapithecus
B. Australopithecus
c. Homo habitue
D. Homo erectus | 0 | Biology |
The curve satisfying \( \frac{\mathbf{d}^{2} \boldsymbol{y}}{\mathbf{d} \boldsymbol{x}^{2}}-\mathbf{4} \boldsymbol{y}^{\prime}=\mathbf{0} \) and
passing through (1,0) is:
A \( \cdot y=x e^{4 x} \)
B . \( y=a e^{4 x} \)
c. \( y=e^{4 x}-e^{4} \)
D・ \( y=a\left(e^{4 x}-e^{4}\right) \) | 2 | Maths |
Which of the following is true about
Fischer Projection?
A. The vertical lines are oriented away from you and the horizontal lines are oriented toward you.
B. The vertical lines are oriented towards you and the horizontal lines are oriented away from you.
C. Both the horizontal and vertical lines are oriented away from you.
D. Both the horizontal and vertical lines are oriented
towards you. | 1 | Chemistry |
Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?
A \( \cdot \operatorname{CaSO}_{4} \)
в. \( B e S O_{4} \)
c. \( B a S O_{4} \)
D. \( \operatorname{sr} \operatorname{sO} 4 \) | 1 | Chemistry |
If the function \( \boldsymbol{f}(\boldsymbol{x})= \)
\( \left(a^{2}-3 a+2\right) \cos \frac{x}{2}+(a-1) x \)
possesses critical points, then \( a \) belongs to the interval
\( \mathbf{A} \cdot(-\infty, 0) \cup(4, \infty) \)
B . \( (-\infty, 0] \cup[4, \infty) \)
\( \mathbf{c} \cdot(-\infty, 0] \cup\{1\} \cup[4, \infty) \)
D. None of these | 2 | Maths |
If \( P \) is a point on a circle with centre \( C \) then the line drawn through \( P \) and perpendicular to CP is the tangent to the circle at the point \( P \)
A. True
B. False
c. Either
D. Neither | 2 | Maths |
Which of the following is synthetic sweetener?
A. Saccharin
B. Aspartame
c. Dulcin
D. All of the above | 1 | Chemistry |
The breakdown field for air is about \( 2 x \)
\( \mathbf{1 0}^{6} \) volt/m. Therefore, the maximum
charge that can be placed on a sphere of diameter \( 10 \mathrm{cm} \) is
A \( .2 .0 \times 10^{-4} \mathrm{c} \)
В. \( 5.6 \times 10^{-7} \mathrm{c} \)
c. \( 5.6 \times 10^{-2} \mathrm{c} \)
D . \( 2.0 \times 10^{2} \mathrm{c} \) | 3 | Physics |
If the standard internal energy change for the reaction \( O F_{2}(g)+H_{2} O(g) \longrightarrow \)
\( O_{2}(g)+2 H F(g), \) at \( 298 \mathrm{K} \) is \( x k J \)
[Given standard enthalpies of formation
in \( k J m o l^{-1} \) are \( O F_{2}(g)= \)
\( +20 ; H_{2} O(g)=-250 \) and \( H F(g)= \)
\( -270 . \)
Then \( -100 x \) is | 1 | Chemistry |
If \( \vec{a}+\vec{b}+\vec{c}=0,|\vec{a}|=3,|\vec{b}|=5,|\vec{c}|=7 \)
then the angle between \( \vec{a} \& \vec{b} \) is?
A \( \cdot \frac{\pi}{6} \)
в. \( \frac{2 \pi}{3} \)
\( c \cdot \frac{5 \pi}{3} \)
D. | 3 | Physics |
toppr
Q Type your question
\( A \)
B.
\( c \)
\( D \) | 1 | Chemistry |
Lymph does not contain
A. Red blood cells
B. White blood cells
c. Platelets
D. Both A and C | 0 | Biology |
The mobility of hole in a semiconductor depend on
A. Electric field
B. Potential difference
c. current
D. Mass | 3 | Physics |
\( A B C \) is an isosceles triangle such that
\( A B=A C . D \) is the mid point of \( A C . A \)
circle is drawn taking \( B D \) as diameter which intersects \( A B \) at point \( E \).then
\( \boldsymbol{A C}=\mathbf{3 A E} \)
A. True
B. False | 2 | Maths |
A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate
(i) The maximum height to which it rises.
\( (i i) \) The total time it takes to return to
the surface of the earth. | 3 | Physics |
Two identical helium filled balloon \( \boldsymbol{A} \)
and \( B \mathrm{m} \) fastened to a weight of \( 5 g \) by
threads floats in equilibrium as shown
in fig. Calculate the charge on each
balloons, assuming that they carry
equal charges | 3 | Physics |
Any point on the \( x \) -axis is of the form
\( \mathbf{A} \cdot(x, y) \)
в. \( (0, y) \)
c. \( (x, 0) \)
D. \( (x, x) \) | 2 | Maths |
Consider the Newmann projection
formula of most stable conformation of
3-hydroxybutanal. It is stable due to:
This question has multiple correct options
A. minimum torsional strain
B. intramolecular H bonding
C. its being in the anti conformation
D. all of these | 1 | Chemistry |
Give an account on the classes reptilia
and aves. | 0 | Biology |
A woman weighing \( 63 \mathrm{kg} \) eats plum cake whose energy content is 9800 calories. If all this energy could be utilized by her, she can ascend a height of
A. \( 1 m \)
B. \( 66 m \)
\( c \cdot 100 m \)
D. \( 42 m \) | 3 | Physics |
Let \( S \) be the infinite sum given by \( S= \) \( \sum_{n=0}^{\infty} \frac{a_{n}}{10^{2 n}}, \) where \( \left(a_{n}\right)_{n \geq 0} \) is a sequence
defined by \( a_{0}=a_{1}=1 \) and \( a_{j}= \)
\( 20 a_{j-1} \) for \( j \geq 2 . \) If \( S \) is expressed in the form \( \frac{a}{b}, \) where \( a, b \) are coprime positive
integers, than \( a \) equals.
A . 60
B. 75
c. 80
D. 81 | 2 | Maths |
\( \boldsymbol{f}(\boldsymbol{x})=\boldsymbol{x}(\boldsymbol{x}-1) \) in the interval \( [\mathbf{1}, \mathbf{2}] \) if
\( \boldsymbol{f}^{\prime}(\boldsymbol{c})=\boldsymbol{f}(1) . \) Find \( c \) | 2 | Maths |
Focal length of a convex lens is \( 10 \mathrm{cm} \) When the object is moved from \( 15 \mathrm{cm} \) to
\( 25 \mathrm{cm}, \) the magnitude of linear magnification
A. will increase
B. will decrease
c. will first increase then decrease
D. will first decrease then increase | 3 | Physics |
Find \( (-32)-(-50) \) | 2 | Maths |
A proton and ana - particle
accelerated through same voltage.The ratio of their de-broglie wavelength will
be:
A .1: 2
B . \( 2 \sqrt{2}: 1 \)
c. \( \sqrt{2}: 1 \)
D. 2: 1 | 3 | Physics |
Let \( f \) be any continuously differentiable function on \( [a, b] \) and twice
differentiable on \( (a, b) \) such that
\( \boldsymbol{f}(\boldsymbol{a})=\boldsymbol{f}^{\prime}(\boldsymbol{a})=\mathbf{0} \) and \( \boldsymbol{f}(\boldsymbol{b})=\mathbf{0} . \) Then
This question has multiple correct options
A \( \cdot f^{\prime \prime}(a)=0 \)
B. \( f^{\prime}(x)=0 \) for some \( x \in(a, b) \)
C \( . f^{\prime \prime}(x) \neq 0 \) for some \( x \in(a, b) \)
D. \( f^{\prime \prime \prime}(x)=0 \) for some \( x \in(a, b) \) | 2 | Maths |
Current of 10 ampere and 2 ampere are passed through two parallel wires A and
B, respectively in opposite directions. If the wire \( A \) is infinitely long and the length of the wire \( \mathrm{B} \) is \( 2 \mathrm{m} \), the force on the conductor \( B \) which is situated at 10
\( \mathrm{cm} \) distance from A will be
\( \mathbf{A} \cdot 8 \times 10^{-5} N \)
B \( \cdot 4 \times 10^{-5} N \)
c. \( 8 \pi \times 10^{-7} N \)
D. \( 4 \pi \times 10^{-7} N \) | 3 | Physics |
A small object of mass \( m, \) on the end of
a light cord, is held horizontally at a distance \( r \) from a fixed support as
shown. The object is then released. What is the tension in the cord when the
object is at the lowest point of its
swing?
A. \( m g / 2 \)
в. \( m g \)
\( \mathbf{c} \cdot 2 m g \)
D. \( 3 m g \) | 3 | Physics |
Two particles, A and B having equal charges, after being accelerated through the same potential difference enter into a region of uniform magnetic field and the particles describe circular
paths of radii \( \boldsymbol{R}_{1} \) and \( \boldsymbol{R}_{2} \) respectively.
The ratio of the masses of \( A \) and \( B \) is:
\( \mathbf{A} \cdot \sqrt{R_{1} / R_{2}} \)
в. \( R_{1} / R_{2} \)
c. \( \left(R_{1} / R_{2}\right)^{2} \)
\( \mathbf{D} \cdot\left(R_{2} / R_{1}\right)^{2} \) | 3 | Physics |
A system consists of two identical
small balls of mass 2 kg each
connected to the two ends of a 1 m long light rod. The system is rotating about a fixed axis through the centre of the rod and perpendicular to it at angular speed of 9 rad/s. An impulsive force of
average magnitude \( 10 N \) acts on one of the masses in the direction of its
velocity for \( 0.20 s . \) Calculate the new
angular velocity of the system. | 3 | Physics |
A long straight wire in the horizontal
plane carries a current of \( 50 A \) in north
to south direction. Given the magnitude
and direction of \( B \) at a point 2.5 m east
of the wire.
A \( \cdot 2 \times 10^{-6} T, \) south
B . \( 3 \times 10^{-6} T \), down
c. \( 4 \times 10^{-6} T, \) up
D. \( 6 T \), north | 3 | Physics |
What is heavy water?
\( \mathbf{A} \cdot H_{2} O^{18} \)
B. \( D_{2} \),
\( \mathrm{c} \cdot \mathrm{H}_{2} \mathrm{O}^{1} \)
D. \$\$H_\{2] | 1 | Chemistry |
Excretion of wastes produced during photosynthesis in plants takes place through
A. Roots
B. Stomata.
c. stem
D. Both A and B | 0 | Biology |
Simplify:
\( (a+b+c)^{2}+(a-b+c)^{2} \) | 2 | Maths |
Which is used to produce smoke
screen?
A. Calcium phosphide
B. zinc sulphate
c. sodium carbonate
D. zinc phosphide | 1 | Chemistry |
The decomposition of a beam of white light into its constituent colours is known as:
A. Scattering
B. Dissemination
c. Dispersion
D. Angular dispersion | 3 | Physics |
The largest subunit of prokaryotic ribosomes is
A . 30s
B. 40S
\( c .50 s \)
D. 60 s | 0 | Biology |
In the \( X e F_{4} \) molecule, the \( X e \) atom is
in the:
A \( \cdot s p^{2} \) -hybridisation state
B. \( s p^{3} \) -hybridisation state
c. \( s p^{2} d \) -hybridized state
D. \( s p^{3} d^{2} \) -hybridized state | 1 | Chemistry |
Enthalpy of the system is given as:
\( \mathbf{A} \cdot H+P V \)
в. \( U+P V \)
c. \( U-P V \)
\( \mathbf{D} \cdot H-P V \) | 1 | Chemistry |
n the given figure, which of the
following is a line of symmetry?
A. Line A
B. Line B
c. Line A and B
D. Line | 2 | Maths |
What is the range of the data:
\( \mathbf{4 8}, \mathbf{6 5}, \mathbf{2 7}, \mathbf{2 3}, \mathbf{4 4}, \mathbf{4 1}, \mathbf{2 5}, \mathbf{7 0}, \mathbf{4 9} ? \) | 2 | Maths |
The mean of 8 numbers is 25 if each
number is multiplied by 2 the new mean will be
A . 12.5
B. 25
c. 40
D. 50 | 2 | Maths |
is the stored carbohydrates in animals.
A. Cellulose
B. Glycogen
c. starch
D. Glucose
E . Fructose | 0 | Biology |
If \( y=\frac{x^{2}}{2}+\frac{1}{2} \times \sqrt{x^{2}+1}, \) then \( 2 y= \)
\( x y^{\prime}, \) where \( y^{\prime} \) denotes the derivative of \( y \)
w.r.t. \( \boldsymbol{x} \)
A. True
B. False | 2 | Maths |
Factorise \( \$ \$ 5 x^{\wedge} 2 y-15 x y^{\wedge} 2 \$ \)
A \( .2 x y(2 x-15 y) \)
в. \( 5 y(x-15 y) \)
c. \( 5 x y(x-3 y) \)
D. \( x y(5 x-3 y) \) | 2 | Maths |
What is the action of acidified
potassium dichromate on acetaldehyde? | 1 | Chemistry |
A capacitance of \( \left(\frac{10^{-3}}{2 \pi}\right) F \) and an inductance of \( \left[\frac{100}{\pi}\right] m H \) and \( a \) resistance of \( 10 \Omega \) are connected in
series with an AC voltage source of \( 220 V, 50 H z . \) The phase angle of the circuit is
A . \( 60^{\circ} \)
B. \( 30^{\circ} \)
\( \mathbf{c} \cdot 45^{\circ} \)
D. \( 90^{\circ} \) | 3 | Physics |
\( n \) moles of an ideal gas undergoes a
process \( A \rightarrow B \) as shown in the figure.
Maximum temperature of the gas
during the process is:
A \( \cdot \frac{3 P_{o} V_{o}}{2 n R} \)
B. \( \frac{9 P_{o} V_{o}}{4 n R} \)
c. \( \frac{9 P_{o} V_{o}}{2 n R} \)
D. \( \frac{9 P_{o} V_{o}}{n R} \) | 3 | Physics |
An emulsifier is a substance which:
A. stabilises the emulsion
B. homogenises the emulsion
c. coagulates the emulsion
D. accelerates the dispersion of liquid in liquid | 1 | Chemistry |
Rewrite the following rational numbers in the simplest form:
\( \frac{-44}{72} \) | 2 | Maths |
A research satellite of mass \( 200 \mathrm{kg} \) circles the earth in an orbit of average radius \( \frac{3 R}{2}, \) where \( R \) is the radius of the earth. Assuming the gravitational pull on a mass \( 1 \mathrm{kg} \) on earth's surface to be
\( 10 \mathrm{N}, \) the pull on this satellite will be:
A . \( 860 \mathrm{N} \)
B. 889 N
c. \( 827 \mathrm{N} \)
D. 798 N | 3 | Physics |
How do chlorofluorocarbons (CFSs)
enter the atmosphere and how do they affect humans? Explain. | 0 | Biology |
In system called the star system we have 1 star kilogram \( =10^{20} k g .1 \)
starmeter \( =10^{8} m, 1 \) starsecond \( = \)
\( 10^{3} \)second then calculate the value of
1 joule in this system.
A \( \cdot 10^{-30} \) star joule
B . \( 10^{-27} \) star joule
C \( .10^{-32} \) star joule
D. None of these | 3 | Physics |
Which of the following is tertiary alcohol?
A. Ethyl alcohol
B. Isopropyl alcohol
c. Neopentyl alcohol
D. 2-methyl 2-propanol | 1 | Chemistry |
In the following, which is the cube of odd natural number: 8,64,216,343
A . 343
B. 64
\( c \cdot 216 \)
D. 8 | 2 | Maths |
A charge of \( 5 \mu \mathrm{C} \) is placed at the center
of a square \( A B C D \) of side \( 10 \mathrm{cm} . \) Find the work done (in \( \mu \) ) in moving a charge of
\( 1 \mu C \) from \( A \) to \( B \) | 3 | Physics |
Glycolysis cannot occur in absence of
A. \( C a \)
в. \( M n \)
c. \( M g \)
D. \( C o \) | 0 | Biology |
When two waves of almost equal
frequency \( n_{1} \) and \( n_{2} \) are produced simultaneously, then the times interval between successive maxima is
A \( \cdot \frac{1}{n_{1}+n_{2}} \)
в. \( \frac{1}{n_{1}}+\frac{1}{n_{2}} \)
c. \( \frac{1}{n_{1}}-\frac{1}{n_{2}} \)
D. \( \frac{1}{n_{1}-n_{2}} \) | 3 | Physics |
The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of
energy?
A. Yes
B. No
c. Yes, at certain instants
D. None of the above | 3 | Physics |
Expand the following binomial \( \left(1-\frac{1}{x}\right)^{10} \) | 2 | Maths |
Reverberation means
A. persistence of sound when intensity of sound from the source is increased
B. persistence of sound when intensity of sound from the source is decreased
C . persistence of sound even when source is turned off
D. persistence of sound when source is moved away | 3 | Physics |
The common oxidation state shown by Europium in their compounds is:
\( A \cdot+1 \)
\( B \cdot+3 \)
\( c \cdot+5 \)
\( D \cdot+6 \) | 1 | Chemistry |
Two solids \( A \) and \( B \) float in water. It is
observed that \( A \) floats with half of its
volume immersed and B floats with \( 2 / 3 \) of its volume immersed. The ratio of
their densities is
A .4: 3
B. 3:4
\( c \cdot 2: 3 \)
D. 3:2 | 3 | Physics |
Find the value of
\( a \) for which the function \( f \) defined by
\( f(x)=\left\{\begin{array}{ll}a \sin \frac{\pi}{2}(x+1) & , x \leq 0 \\ \frac{\tan x-\sin x}{x^{3}} & , x>0\end{array}\right. \)
continuous at \( x=0 \) | 2 | Maths |
Which of the following oxides dissolves in water to form a strongly acidic
solution?
\( \mathbf{A} \cdot N a_{2} O \)
в. \( C a O \)
c. \( A l_{2} O_{3} \)
D. ZnO
E. \( S O_{3} \) | 1 | Chemistry |
Identify the term or substance based on the descriptions given below:
Hydrocarbon containing a triple bond used for welding purposes. | 1 | Chemistry |
A bullet of mass 125 gm leaves a rifle with a velocity of \( 500 m s^{-1} \). The rifle
recoils with a velocity of \( 5 m s^{-1} \). Find
the mass of the rifle.
\( A \cdot 100 \mathrm{kg} \)
B. 12.5 kgg
\( c \cdot 1.25 \mathrm{kg} \)
D. 125 kg | 3 | Physics |
Which of the following statement is
incorrect about xenon trioxide?
A. It can be prepared by hydrolysis of \( X e F_{4} \)
B. It can be prepared by hydrolysis of \( X e F_{6} \)
C. It is a non volatile solid.
D. It's aqueous is slightly basic. | 1 | Chemistry |
One girl student uses the liquid compound to remove nail paint from her nail. The liquid compound removes the nail paint from her nail. Give the name of this compound.
A . Acetic acid
B. Formalin
c. Ethanol
D. Propanone | 1 | Chemistry |
From a group of 2 men and 3 women two persons are selected. Describe the
sample space of the experiment. If \( \boldsymbol{E} \) is
the event in which one man and one
woman are selected, then which are the
cases favourable to \( \boldsymbol{E} \) ? | 2 | Maths |
The maximum probability of finding
electron in the \( d_{x y} \) orbital is:
A. along with \( x \) - axis
B. along the \( y \) -axis
c. at an angle of 45 from the \( x \) and \( y \) axis
D. at an angle of 90 from the \( x \) and \( y \) axis | 1 | Chemistry |
A stone falls freely from rest from a height \( h \) and it travels a distance \( \frac{9 h}{25} \) in the last second. The value of h is :
A . \( 145 \mathrm{m} \)
B. 100 \( m \)
c. \( 122.5 \mathrm{m} \)
D. 200 m | 3 | Physics |
A particle is moving in a circle of radius \( 4 \mathrm{cm} \) with constant speed of \( 1 \mathrm{cm} / \mathrm{s} \) Find the time period of the particle. | 3 | Physics |
A 0.004 M solution of \( N a_{2} S O_{4} \) is
isotonic with a \( 0.010 \mathrm{M} \) solution of
glucose at same temperature. The apparent degree of dissociation of
\( N a_{2} S O_{4} \) is:
A . \( 25 \% \)
B. \( 50 \% \)
c. \( 75 \% \)
D. \( 85 \% \) | 1 | Chemistry |
In an unbiased \( n \) -p junction electrons diffuse from n-region to p- region because
A. electrons travel across the junction due to potential difference
B. electrons concentration in n region is more as compared to that in p-region
c. holes in p-region attract them.
D. only electrons move from n- to p- region and not the vice-versa. | 3 | Physics |
Two thick plates having same charges (same charge density \( \sigma \) ) are placed side by side. Consider the case of infinite plate. Find the difference between the electric field present
between the plate and remaining space of the plate, \( (\varepsilon=\text { permittivity }) \)
A \( \cdot \frac{\sigma}{\varepsilon} \)
в. \( 2 \frac{\sigma}{\varepsilon} \)
c. \( \frac{\sigma}{2 \varepsilon} \)
D. | 3 | Physics |
What is the maximum capacity of a normal human eye to see small objects?
A. 10,000 micrometer
B. 10 micrometer
c. 100 micrometer
D. 1000 micrometer | 3 | Physics |
The strongest fundamental force in nature is
A. Electromagnetic force
B. Strong nuclear force
c. weak nuclear force
D. gravitational force | 3 | Physics |
Prove that, \( \left(^{2 n} C_{1}\right)^{2}+2 \cdot\left(^{2 n} C_{1}\right)^{2}+ \)
3. \( \left(^{2 n} C_{3}\right)^{2}+\ldots .+2 n .\left(^{2 n} C_{2 n}\right)^{2}= \)
\( \frac{(4 n-1) !}{\{(2 n-1) !\}^{2}} \) | 2 | Maths |
The figure shows a source (a battery) with an emf \( E \) of \( 12 V \) with an internal
resistance \( r \) of \( 2 \Omega \) and an external
resistance of \( 4 \Omega \) is added to complete the circuit. What are the voltmeter and
ammeter readings? | 3 | Physics |
A battery of \( 10 \mathrm{V} \) and internal resistance
\( 0.5 \Omega \) is connected across a variable
resistance R. The value of \( R \) for which
the power delivered in its maximum state, is equal to :-
A \( .0 .5 \Omega \)
в. \( 1 \Omega \)
c. \( 1.5 \Omega \)
D. \( 2.0 \Omega \) | 3 | Physics |
Calcium superphosphate, sodium
nitrate and ammonium sulphate are
used:
A. in refrigerators
B. air conditioners
c. to increase the yield of fruits, vegetables and other crops
D. invertors | 1 | Chemistry |
Can you draw a triangle which has exactly three lines of symmetry? Sketch a rough figure. | 2 | Maths |
Write the function of the following part of human eye.
Cornea. | 3 | Physics |
The two p orbitals are deflected by an angle of:
A \( \cdot 45^{\circ} \)
B . \( 180^{\circ} \)
\( c .90^{\circ} \)
D. \( 120^{\circ} \) | 1 | Chemistry |
Suicide bags of cells are
A. Endoplasmic reticulum
B. Lysosome
c. Golgi bodies
D. Vacuoles | 0 | Biology |
Write the formula of the compound of
iodine which is obtained when
conc. \( \boldsymbol{H} \boldsymbol{N} \boldsymbol{O}_{3} \) oxidises \( \boldsymbol{I}_{2} \) | 1 | Chemistry |
Drying of a shirt in the sun is an
example of changes. | 1 | Chemistry |
Which of the following is a fat soluble vitamin?
\( A \cdot \) Vitamin A
B. Vitamin C
c. Pyridoxine
D. Vitamin B - complex | 1 | Chemistry |
a. Both (A) and (B) are resolvable. | 1 | Chemistry |
A source of constant potential
difference is connected across a
conductor having irregular cross-
section as shown in figure. Then :-
A. Electric field intensity at \( P \) is greater than at \( Q \).
B. Rate of electric current crossing per unit area of cross section at \( P \) is less than that at \( Q \)
C. The rate of generation of heat per unit length at \( P \) is greater than that at \( Q \).
D. Mean kinetic energy of free electron at \( P \) is greater than that at \( Q \) | 3 | Physics |
Dobereiner classified elements into
groups based on their properties. The number of elements in each group is | 1 | Chemistry |
Assertion
STATEMENT 1 (Assertion)- Absolute
value of H cannot be determined
Reason
STATEMENT 2 (Reason)- \( \Delta \boldsymbol{H}_{(g)}= \)
\( \boldsymbol{\Delta} \boldsymbol{E}_{(\boldsymbol{g})}+\boldsymbol{\Delta} \boldsymbol{n}_{(g)} \boldsymbol{R} \boldsymbol{T} \)
A. Statement 1 is True, statement 2 is True; statement 2 is a correct explanation for statement 1
B. Statement 1 is True, statement 2 is True; statement 2 is not a correct explanation for statement 1
c. Statement 1 is True, statement 2 is False.
D. Statement 1 is False, statement 2 is True | 1 | Chemistry |
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