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Biospecies concept was propounded by
A. Ernst Mayr
B. Darwin
c. simpson
D. Aristole
| 0 |
Biology
|
Hydrogen bomb is based on the
principle of:
A. nuclear fission
B. natural radioactivity
c. nuclear fusion
D. artificial radioactivity
| 3 |
Physics
|
Median of the odd divisors of 360 is
A. the mean of 3 rd and 4 th item
B. the mean of 4 th and 5 th item
c. the mean of 5 th and 6 th item
D. none of these
| 2 |
Maths
|
Which of the following is the correct
form of Schrodinger wave equation?
A \( \cdot \frac{\partial^{2} \Psi}{\partial^{2} x}+\frac{\partial^{2} \Psi}{\partial^{2} y}+\frac{\partial^{2} \Psi}{\partial^{2} z}+\frac{8 \pi^{2} m}{h^{2}}(E-V) \Psi=0 \)
B \( \cdot \frac{\partial^{2} \Psi}{\partial x^{2}}+\frac{\partial^{2} \Psi}{\partial y^{2}}+\frac{\partial^{2} \Psi}{\partial z^{2}}+\frac{8 \pi^{2} m}{h^{2}}(E-V) \Psi=0 \)
C \( \cdot \frac{\partial \Psi^{2}}{\partial x^{2}}+\frac{\partial \Psi^{2}}{\partial y^{2}}+\frac{\partial \Psi^{2}}{\partial z^{2}}+\frac{8 \pi^{2} m}{h^{2}}(E-V) \Psi=0 \)
D \( \cdot \frac{\partial^{2} \Psi}{\partial x^{2}}+\frac{\partial^{2} \Psi}{\partial y^{2}}+\frac{\partial^{2} \Psi}{\partial z^{2}}+\frac{8 \pi^{2} m^{2}}{h^{2}}(E-V) \Psi=0 \)
| 1 |
Chemistry
|
Two charges each of \( +Q \) units are
placed along a line. A third charge \( -q \) is
placed between them. At what position and for what value of \( q, \) will the system be in equilibrium?
| 3 |
Physics
|
Explain the laboratory method for preparation of hydrogen peroxide.
| 1 |
Chemistry
|
Which of the following statements has
the truth value \( ^{\prime} F^{\prime} ? \)
A. A quadratic equation has always a real root
B. The number of ways of seating 2 persons in two chairs out of \( n \) persons in \( P(n, 2) \)
C. The cube roots of unity are in GP
D. None of the above
| 2 |
Maths
|
The resistance of a heating element is
\( 99 \Omega \) at room temperature. What is the temperature of the element if the
resistance is found to be \( 116 \Omega ? \)
(Temperature coefficient of the material
of the resistor is \( 1.7 \times 10^{-4} o C^{-1} \) ).
A \( \cdot 9999^{\circ} \mathrm{C} \)
B . \( 1005.3^{\circ} \mathrm{C} \)
\( \mathbf{c} \cdot 1020.2^{\circ} \mathrm{C} \)
D. \( 1037.1^{\circ} \mathrm{C} \)
| 3 |
Physics
|
If \( a, b \) are constants then, \( V a r(a+b X) \)
is
A. \( \operatorname{Var}(a)+\operatorname{Var}(X) \)
B. \( \operatorname{Var}(a)-\operatorname{Var}(X) \)
\( \mathbf{c} \cdot b^{2} \operatorname{Var}(X) \)
D. None of these
| 2 |
Maths
|
In a multiple choice question, there are
four alternative answer of which one or
more than one is correct. A candidate
will get marks on the question only if he ticks all the correct answer. The
candidate decides to tick all the correct
answer. The candidate decides to tick
answers at random. If he is allowed up to three chances to answer the
question, the probability that he will get marks on it is
\( A \cdot \frac{1}{2} \)
B.
\( c \cdot \frac{1}{4} \)
D. 5
| 2 |
Maths
|
If \( z_{1}=a+i b \) and \( z_{2}=c+i d \) are
complex numbers such tat \( \left|z_{1}\right|= \)
\( \left|z_{2}\right|=1 \& R e\left(z_{1} \overline{z_{2}}\right)=0, \) then the pair
of complex numbers \( \boldsymbol{w}_{1}=\boldsymbol{a}+\boldsymbol{i} \boldsymbol{c} \) and
\( \boldsymbol{w}_{2}=\boldsymbol{b}+\boldsymbol{i} \boldsymbol{d} \) satisfies -
This question has multiple correct options
\( \mathbf{A} \cdot\left|w_{1}\right|=1 \)
B \( \cdot\left|w_{2}\right|=1 \)
\( \mathbf{c} \cdot \operatorname{Re}\left(w_{1} \overline{w_{2}}\right)=0 \)
D. None of these
| 2 |
Maths
|
lonic hydride reacts with water to give:
A. hydride ions
B. acidic solution
c. protons
D. basic solution
| 1 |
Chemistry
|
The reptile which lacks penis belongs to
A. ophidia
B. crocodilia
c. Gymnophiona
D. Rhynchocephalia
| 0 |
Biology
|
In the Boolean algebra, the following one
is wrong
A . \( 1.0=0 \)
B. \( 0.1=0 \)
c. \( 1.1=0 \)
D. \( 1.1=1 \)
| 3 |
Physics
|
There are 3 balls of same shape and size made of wood, iron and plastic. Which one of them would have highest inertia?
A. wood
B. Iron
c. Plastic
D. None of these
| 3 |
Physics
|
toppr
Q Type your question
volume. I ne cyıınaer nas a cnarge per
unit length of \( \lambda \)
A Gaussian surface is imagined that is
also shown in the diagram. This
Gaussian surface is also a cylinder
having the same axis as the charged
cylinder. The Gaussian cylinder's radius
is \( a, \) where \( a<R, \) and its length is \( L \)
What is the charge enclosed in the
Gaussian cylinder?
\( ^{\mathbf{A}} \cdot Q_{e n c}=\lambda \frac{a}{R} \)
\( ^{\mathrm{B}} \cdot_{e n c}=\lambda L \frac{a}{R} \)
\( \mathrm{C}_{e n c}=\lambda L \frac{a^{3}}{R^{3}} \)
\( \mathrm{D} \cdot \mathrm{Q}_{e n c}=\lambda \frac{a^{3}}{R^{3}} \)
\( \mathrm{E} \cdot Q_{e n c}=\lambda L \frac{a^{2}}{R^{2}} \)
| 3 |
Physics
|
Assimilatory power refers to the
A. Generation of ATP and NADPH \( _{2} \)
B. Reduction of \( \mathrm{CO}_{2} \)
C . Splitting of water
D. Disintegration of plastids
| 0 |
Biology
|
Hypermetropia is due to the
of the eye.
A. low converging power
B. low diverging power
c. high converging power
D. high diverging power
| 3 |
Physics
|
Is sphere, a \( 2 D \) or a \( 3 D \) object?
A . \( 2 D \)
в. \( 3 D \)
c. Does not exist in both planes
D. None of the above
| 2 |
Maths
|
Removal of water molecule from the
substrate is called
A. Enolation
B. Phosphorylation
c. Decarboxylation
D. Oxidation
| 0 |
Biology
|
A ray passing with which part of a lens emerges undeviated ?
A. Focus
B. Centre of curvature
c. optical centre
D. Between focus and centre of curvature
| 3 |
Physics
|
Number of Bonds present in \( N_{2} O_{3} \)
molecule is :
\( A \cdot 2 \)
B. 4
\( c \cdot 6 \)
D. 8
| 1 |
Chemistry
|
Find the derivative of the following
function from first principle:
\( -x \)
| 2 |
Maths
|
Figure shows a composite system of
two uniform rods of lengths as
indicated. If both the rods are of same
density. Then the coordinates of the
centre of mass of the system of rods
are:
A \( \cdot\left(\frac{L}{2}, \frac{2 L}{3}\right) \)
B \( \cdot\left(\frac{L}{4}, \frac{2 L}{3}\right) \)
c. \( \left(\frac{L}{6}, \frac{2 L}{3}\right) \)
D. \( \left(\frac{L}{6}, \frac{L}{3}\right) \)
| 3 |
Physics
|
A particle of charge \( q \) and mass \( m \)
moves in a circular path of radius \( r \) in a
uniform magnetic field \( B \).
The particle is replaced with a particle
of identical charge and mass \( \frac{1}{2} m \) The radius of the new circular path the
particle makes is:
A \( \cdot \frac{1}{4} r \)
в. \( \frac{1}{2} r \)
c. \( r \)
D. \( 2 r \)
E . \( 4 r \)
| 3 |
Physics
|
What is incorrect about the given
structure?
This question has multiple correct options
\( A \). It has six D.U
B. It has ten \( s p^{2} \) hybrid C-atom
C. It has ten \( s p^{2}-s p^{2} \) C-C \( \sigma \) bond
D. All are correct.
| 1 |
Chemistry
|
Comet is an object with a head and a \( _{-}-_{-}-_{-}-_{-}- \) tail.
A. pale, long
B. bright, long
c. pale, short
D. bright, short
| 3 |
Physics
|
The terms order and molecularity are
common in chemical kinetics.
(a) What do you mean by order and molecularity?
(b) (i) Write two factors influencing rate of a reaction.
(ii) Write Arrhenius equation.
| 1 |
Chemistry
|
The voltage across the electrodes of a cathode ray tube is 500 V. Then the speed of the electron is
A \( \cdot 2.6 \times 10^{7} m s^{-1} \)
B. \( 1.33 \times 10^{7} m s^{-1} \)
\( \mathbf{c} \cdot 2.8 \times 10^{7} m s^{-1} \)
D. \( 1.9 \times 10^{7} \mathrm{ms}^{-1} \)
| 3 |
Physics
|
Very short answer type:
State one advantage and one disadvantage of cleistogamy.
| 0 |
Biology
|
When a constant potential difference is maintained between the ends of a
conductor
A. A steady current flows through the conductor
B. A current density is established at every point inside the conductor
c. An electric field is established inside the conductor
D. All are true
| 3 |
Physics
|
\( 7 / 8 \) fraction of a sample disintegrates in 't' time, how much time it will take to disintegrate \( 15 / 16 \) fraction?
\( \mathbf{A} \cdot \mathbf{t} \)
B. \( 4 / 3 t \)
\( c \cdot 5 / 3 t \)
D. 2t
| 3 |
Physics
|
How to divide the equation in algebraic expression
| 2 |
Maths
|
An electric charge of 5 Faraday's is passed through three electrolytes
\( A g N O_{3}, C u S O_{4} \) and \( F e C l_{3} \) solution
The grams of each metal liberated at cathode will be:
A. \( A g=10.8 g, C u=12.7 g, F e=1.11 g \)
в. \( A g=540 g, C u=367.5 g, F e=325 g \)
c. \( A g=108 g, C u=63.5 g, F e=56 g \)
D. \( A g=540 g, C u=158.8 g, F e=93.3 g \)
| 1 |
Chemistry
|
The diagram below shows a positively charged particle moving toward the right and about to enter a magnetic field whose direction is shown by the blue arrows. What is the direction of the
force on the positively charged particle (from our point of view) at the instant it
enters the magnetic field?
A . right
B. left
c. up
D. toward us
E. away from us
| 3 |
Physics
|
What is Quiescent stage in cell division
\( ? \)
| 0 |
Biology
|
\( \lim _{x \rightarrow 0} \frac{\tan ^{4} x-\sin ^{4} x}{x^{4}}= \)
A . 0
B.
\( c \cdot \frac{2}{3} \)
D.
| 2 |
Maths
|
Explain the cleansing action of soap.
| 1 |
Chemistry
|
The rate of the reaction \( \boldsymbol{A}+\boldsymbol{B}_{2} \rightarrow \)
\( A B+B ; \) is directly proportional to the
concentration of \( A \) and independent of
concentration of \( B_{2} \), hence, rate law is:
\( \mathbf{A} \cdot k[A]\left[B_{2}\right] \)
\( \mathbf{B} \cdot k[A]^{2}\left[B_{2}\right] \)
c. \( k[A] \)
D. \( k\left[B_{2}\right] \)
| 1 |
Chemistry
|
A uniform sphere of mass \( m \) and radius
\( r \) rolls without sliding over a horizontal
plane, rotating about a horizontal axle
OA. In the process, the centre of the sphere moves with a velocity \( v \) along a
circle of radius \( R \) Find the kinetic
energy of the sphere.
| 3 |
Physics
|
Which pair of following forces will never give resultant force of \( 2 \mathrm{N} \)
A. \( 2 \mathrm{N} \) and \( 2 \mathrm{N} \)
B. 1 N and 1 N
c. \( 1 \mathrm{N} \) and \( 3 \mathrm{N} \)
D. \( 1 \mathrm{N} \) and \( 4 \mathrm{N} \)
| 3 |
Physics
|
In optical fibre,which of the following principles is used?
A. scattering
B. refraction
c. successive reflections
D. total internal reflection
| 3 |
Physics
|
The ratio in which the line \( 3 x+4 y+ \)
\( 2=0 \) divides the distance between
\( 3 x+4 y+5=0 \) and \( 3 x+4 y-5=0 \)
A .7: 3
B. 3: 7
\( c \cdot 2: 3 \)
D. None of these
| 2 |
Maths
|
Heats of combustion of methane,
carbon and hydrogen are 212,94,68
kcal mol \( ^{-1} \)
The heat of formation of \( C H_{4} \) is:
B. +18 kcal mol \( ^{-1} \)
c. -9 kcal mol \( ^{-1} \)
D. None of these
| 1 |
Chemistry
|
The number of primary amines of
formula \( C_{4} H_{11} N \) is:
\( A \cdot 2 \)
B.
\( c \cdot 4 \)
D. 3
| 1 |
Chemistry
|
Carrot root phloem bioassay is a device for
A . Auxin
B. ABA
c. wound hormone
D. cytokinin
| 0 |
Biology
|
The direction cosines of a vector \( \hat{\boldsymbol{i}}+ \) \( \hat{\boldsymbol{j}}+\sqrt{\mathbf{2}} \hat{\boldsymbol{k}} \) are
A \( \cdot \frac{1}{2}, \frac{1}{2}, 1 \)
B. \( \frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}, \frac{1}{2} \)
c. \( \frac{1}{2}, \frac{1}{2}, \frac{1}{\sqrt{2}} \)
D. \( \frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}} \)
| 2 |
Maths
|
The distance \( x \) covered in time \( t \) by a
body having initial velocity \( v_{0} \) and
having constant acceleration \( a \) is given
by \( \boldsymbol{x}=\boldsymbol{v}_{0} \boldsymbol{t}+\mathbf{1} / \mathbf{2} \boldsymbol{a} \boldsymbol{t}^{2} . \) This result follows
from :
A. newton's Ist law
B. newton's IInd law
c. newton's IIIrd law
D. none of the above
| 3 |
Physics
|
Assertion (A): In the synthesis of ammonia by Haber's process, mixture of potassium and aluminium oxides
can be used as promoter. Reason (R): Promoter enhances the
activity of catalyst.
A. Both (A) and (R) are true and
(R) is the correct explanation of (A)
B. Both (A) and (R) are true and (R) is not the correct explanation of \( (A) \)
c. (A) is true and
(R) is false
D. (A) is false but (R) is true
| 1 |
Chemistry
|
The speed of transverse wave on a
stretched string is:
A. directly proportional to the tension in the string
B. directly proportional to the square root of the tension
C. inversely proportional to tension
D. inversely proportional to square root of tension
| 3 |
Physics
|
Three waves of equal frequency having amplitudes \( 10 m m, 4 m m \) and \( 7 m m \) arrive at a given point with successive phase difference \( \frac{\pi}{2} . \) The amplitude of the resulting wave (in \( \mathrm{mm} \) ) is given by:
A . 7
B. 6
c. 5
D. 4
| 3 |
Physics
|
Draw the graph of the equation \( 2 x+ \)
\( \mathbf{3} \boldsymbol{y}+\boldsymbol{6}=\mathbf{0} \)
| 2 |
Maths
|
When an object is placed between optical centre and focus of lens:
A. Inverted, real and enlarged image is formed
B. Virtual, erect and enlarged image is formed
c. Inverted, erect, diminished image is formed
D. Virtual, real, diminished image is formed
| 3 |
Physics
|
Chemical analysis of phloem shows the presence of
A. More amount of carbohydrates
B. organic nitrogenous compounds
c. Minerals
D. Both A and B
| 0 |
Biology
|
\( x \)
cnanges Its pıtch so that It IS rIyıng
\( 100 m / s \) in an area of the Earth's
magnetic field that is perpendicular to
the plane and equal to \( 5.010^{5} T \)
What is the emf induced between the
wing tips? Assume that the plane was previously flying parallel to the earths magnetic field.
A. \( 0.12 \mathrm{v} \)
B. 0.20
c. \( 1.2 v \)
\( D \)
| 3 |
Physics
|
In domestic sewage, suspended solids, colloidal and dissolved materials
constitute
A . \( 10 \% \)
B. \( 5.6 \% \)
\( c .2 .7 \% \)
D. \( 0.1 \% \)
| 0 |
Biology
|
If the value of \( 103.5 \mathrm{kg} \) is rounded off to three significant figures, then the value
is
A \( \cdot 103 \)
B. 103.0
\( c \cdot 104 \)
D. 10.3
| 3 |
Physics
|
'The specific latent heat of fusion of ice
is
A \( \cdot 136 . J g^{-1} \)
в. \( 236 . J g^{-1} \)
c. \( 336 J g^{-1} \)
D. \( 436 J g^{-1} \)
| 3 |
Physics
|
A species of an element \( A \) has a net charge of -1 and it has 18 electrons and
20 neutrons. Identify the correct
statements.
This question has multiple correct options
A . Its symbol will be \( _{17}^{3 \mathrm{A}} \)
B. Its atomic number is 18
c. The number of protons are 17
D. Its mass number is 38
| 1 |
Chemistry
|
The slope of plate characteristic and mutual characteristic curves of a triode
value is \( 0.02 \mathrm{mA} / \mathrm{V} \) and \( 1 \mathrm{mA} / \mathrm{V} \). The
amplification factor of triode value is:
A \( .2 \times 10^{8} \)
B. 20
c. 50
D. 40
| 3 |
Physics
|
Which of the following is incorrectly matched?
A . alkali metal \( \rightarrow \) cesium
B. alkali earth metal \( \rightarrow \) barium
c. chalcogens \( \rightarrow \) silicon
D. halogon \( \rightarrow \) iodine
| 1 |
Chemistry
|
The apparent molar mass of \( \boldsymbol{P C l}_{5} \) on dissociation shows lower value.
If true enter 1 , if false enter 0 .
| 1 |
Chemistry
|
Which of the following elements forms double or triple bonds involving \( \boldsymbol{p}-\boldsymbol{p} \)
bonding?
A. Carbon
B. Silicon
c. Germanium
D. Tin
| 1 |
Chemistry
|
In half wave rectifier, a p-n diode with internal resistance \( 20 \Omega \) is used. If the
load resistance of \( 2 K \Omega \) is used in the
circuit, then the efficiency of this half wave rectifier is (in percentage)
| 3 |
Physics
|
If the slope of the line passing through the points \( (2, \sin \theta) \) and \( (1, \cos \theta) \) is 0
then the general solution of \( \theta \), is
A \( \cdot n \pi+\frac{\pi}{4}, \forall n \in Z \)
B \( \cdot n \pi-\frac{\pi}{4}, \forall n \in Z \)
c. \( _{n \pi \pm} \frac{\pi}{4}, \forall n \in Z \)
D. \( n \pi, \forall n \in Z \)
| 2 |
Maths
|
If \( A \) is a skew-symmetric matrix, then
trace of \( \boldsymbol{A} \) is
| 2 |
Maths
|
The percentage of metals in a mine of
lead ore is \( 60 \% . \) Now the percentage of silver is \( \frac{3}{4} \% \) of metals and the rest is lead. If the mass of ore extracted from
this mine is \( 8000 k g \), the mass (in kg.) of lead is:
A. 4763
в. 4764
c. 4762
D. 476
| 2 |
Maths
|
A long silver tea spoon is placed in a cup filled with hot tea. After some time, the exposed end (the end which is not dipped in tea) of the spoon becomes hot even without a direct contact with the
tea. This phenomenon can be explained mainly by
A. conduction
B. reflection
c. radiation
D. thermal expansion
| 3 |
Physics
|
To make a p-njunction conducting
A. The value of forward bias should be more than the
barrier potenital
B. The value of forward bias should be less than the barrier potential
C. The value of revers bias should be more than the
barrier potential
D. The value of revers bias should be less than the barrier
potential
| 3 |
Physics
|
Arrange the following elements in increasing order of their size.
\( \mathbf{V}, \mathrm{Nb}, \mathrm{Ta}, \mathrm{Db} \)
A. \( v<\mathrm{Nb}=\mathrm{Ta} \approx \mathrm{Db} \)
B. \( D b<N b= \) Ta \( \approx V \)
c. \( \mathrm{Ta}<\mathrm{Nb}=\mathrm{v} \approx \mathrm{Db} \)
D. None of these
| 1 |
Chemistry
|
mole of \( \boldsymbol{P C l}_{5} \) is heated with 0.2 mole
of chlorine in a one litre vessel till
equilibrium is established.At equilibrium if 0.8 mole of chlorine is
present in the vessel, the equilibrium
constant for the dissociation of \( \boldsymbol{P C l}_{5} \) is:
A. 0.9
B. 1.8
c. 1.2
D. 0.5
| 1 |
Chemistry
|
An ideal gas is allowed to expand both reversibly and irreversibly in an isolated
system. If \( T_{i} \) is the initial temperature
and \( T_{f} \) is the final temperature, which of the following is correct?
\( \mathbf{A} \cdot T_{f}>T_{i} \) for reversible process but \( T_{f}=T_{i} \) for irreversible process
B . \( \left(T_{f}\right) \) rev \( =\left(T_{f}\right) \) irrev
C. \( T_{f}=T_{i} \) for both reversible and irreversible process
D. \( \left(T_{i}\right) \) irrev \( >\left(T_{f}\right) \) rev
| 1 |
Chemistry
|
In the figure given above, \( A B \) is paralle
to \( C D . \) If \( \angle D C E=x \) and \( \angle A B E=y \)
then what is \( \angle C E B \) equal to?
A \( \cdot y-x \)
в. \( \frac{(x+y)}{2} \)
c. \( x+y-(\pi / 2) \)
D. \( x+y-\pi \)
| 2 |
Maths
|
Choose the correct answer from the
alternative given.
Complete the following reactions.
\( (i) M n O_{4}^{-}+2 H_{2} O+3 e^{-} \rightarrow \)
\( +40 H^{-} \)
\( (i i) M n O_{4}^{-}+8 H^{+}+5 e^{-} \rightarrow \)
\( +4 H_{2} O \)
\( (i i i) M n O_{4}^{-}+e^{-} \rightarrow \)
\( \mathbf{A} \cdot M n O_{2}, M n^{2+}, M n O_{4}^{2} \)
B. \( M n^{2+}, M n O_{2}, M n O_{4}^{2} \)
c. \( M n O_{4}^{2-}, M n^{2+}, M n O_{4}^{2} \)
D. \( M n O_{2}, M n O_{4}^{2-}, M n^{2+} \)
| 1 |
Chemistry
|
Prabhani Kranti is
I) Okra variety resistant to shoot and fruit borer
II) Bhindi resistant to yellow mosaic
virus
III) A wild varity of bhindi
IV) Produced by sexual hybridization
A. I, I li and III only correct
B. II and IV only correct
c. III and IV only correct
D. I and II only correct
| 0 |
Biology
|
Q Type your question-
particle is attached to the cylinder by a
horizontal thread \( A B \) as shown in the
figure. The particle initially rest on
horizontal plane. A horizontal velocity \( \boldsymbol{v}_{0} \)
is imparted to the particle, normal to the threading during subsequent
motion. Point out the false statements:
This question has multiple correct options
A. Angular momentum of particle about \( O \) remains
constant
B. Angular momentum about \( B \) remains constant
c. Momentum and kinetic energy both remain constant
D. Kinetic energy remains consta
| 3 |
Physics
|
Formation of alkane by the action of zinc on alkyl halide is called:
A. Wurtz reaction.
B. Kolbe's reaction
c. UImann's reaction.
D. Frankland reaction
| 1 |
Chemistry
|
A chord is \( 8 \mathrm{cm} \) away from the centre of
a circle of radius \( 17 \mathrm{cm} . \) Find the length
of the chord.
| 2 |
Maths
|
The Doppler effect is applicable for
A . Light waves only
B. Sound waves only
c. Both light and sound waves
D. None of the above
| 3 |
Physics
|
In optical instruments, the lenses are
used to form images by :
A. Reflection
B. Refraction
c. Dispersion
D. Scattering
| 3 |
Physics
|
\( \boldsymbol{x}+\boldsymbol{y}+\boldsymbol{z}=\mathbf{1} \)
| 2 |
Maths
|
Q Type your question
made to reaci with anute nul tads r is
evolved in the reaction which is made to
pass through the delivery tube into test
tube 2 having solution \( Z \) and a milky
solution is obtained What are \( X, Y \) and \( Z \)
respectively?
A. \( N a O H, C O_{2}, N a_{2} C O_{3} \)
в. \( \operatorname{Ca}(O H)_{2}, H_{2}, C a\left(H C O_{3}\right)_{2} \)
c \( \cdot \operatorname{ca}(O H)_{2}, C O_{2}, C a C O_{3} \)
D \( \cdot \) \( _{C a} \) a \( C \) O \( _{3}, \) C \( O_{2}, C a(O H)_{2} \)
| 1 |
Chemistry
|
A line with direction cosines
proportional to 2,1,2 meets each of the line \( \boldsymbol{x}=\boldsymbol{y}+\boldsymbol{a}=\boldsymbol{z} \) and \( \boldsymbol{x}+\boldsymbol{a}=\boldsymbol{2} \boldsymbol{y}= \)
2 \( z \). The co-ordinates of each of the
points of intersection are given by:
A. \( (3 a, 3 a, 3 a),(a, a, a) \)
в. \( (3 a, 2 a, 3 a),(a, a, a) \)
c. \( (3 a, 2 a, 3 a),(a, a, 2 a) \)
D. \( (2 a, 3 a, 3 a),(2 a, a, a) \)
| 2 |
Maths
|
The least count of a stop watch is 0.2 second. The time of 20 oscillations of a
pendulum is measured to be 25 seconds. The percentage error in the time period is
A . \( 16 \% \)
B. 0.8 \%
c. \( 1.8 \% \)
D. 8\%
| 3 |
Physics
|
A point charge \( Q \) is located at the center of the hollow spherical conductor of
inner radius \( \boldsymbol{R}_{1} \) and outer radius \( \boldsymbol{R}_{2} \)
the conductor being uncharged initially The potential at the inner surface will
be
A \( \cdot K Q\left[\frac{1}{R_{1}}+\frac{1}{R_{2}}\right] \)
В \( \cdot K Q\left[\frac{1}{R_{1}}-\frac{1}{R_{2}}\right] \)
c. \( K Q\left[\frac{1}{R_{2}}-\frac{1}{R_{1}}\right] \)
D. None of these
| 3 |
Physics
|
One conducting U tube can slide inside another as shown in figure, maintaining electric contacts between the tubes. The
magnetic field B is perpendicular to the plane of the figure. If each tube moves
towards the other at a constant speed \( v \)
then the emf induced in the circuit in
terms of \( \mathrm{B}, l \) and \( \mathrm{v} \) where \( l \) is the width of
each tube, will be
A . -Blv
в. Вlv
c. 2 вlv
D. zero
| 3 |
Physics
|
A ball is dropped from a height \( h \) on a
floor of coefficient of restitution \( e \). The
total distance covered by the ball just before second hit is
A \( \cdot h\left(1-2 e^{2}\right) \)
B \( \cdot h\left(1+2 e^{2}\right) \)
c. \( h\left(1+e^{2}\right) \)
\( D \cdot h e^{2} \)
| 3 |
Physics
|
An electron gun with its collector at a potential of \( 100 \mathrm{V} \) fires out electrons in a spherical bulb containing hydrogen gas at low pressure \( \left(\sim 10^{-2} \mathrm{mm} \text { of } \mathrm{Hg} \text { ). } \mathrm{A}\right. \)
magnetic field of \( 2.83 \times 10^{4} T \)
curves the path of the electrons in a
circular orbit of radius 12.0 cm.
(The path can be viewed because the
gas ions in the path focus the beam by attracting electrons, and emitting light by electron capture; this method is known as the fine beam tube method.) Determine e/m from the data.
| 3 |
Physics
|
Which of the following forms a homologus series?
A. Ethane, ethylene, acetylene
B. Ethane, propane, butanol
c. Methanal, ethanol, propanoic acid
D. Butane, 2 - Methylbutane, 2, 3 - Dimethyl butane
| 1 |
Chemistry
|
In a moving coil galvanometer a radial magnetic field is applied with concave magnetic poles, to have
A) uniform magnetic field
B) the plane of the coil parallel to field Choose the correct option among the following
A. both A and B are true
B. both A and B false
c. A is true, B is false
D. A is false, B is true
| 3 |
Physics
|
The Van't Hoff factor of \( 0.1 \mathrm{M} \mathrm{Ba}\left(\mathrm{NO}_{3}\right)_{2} \)
solutions is \( 2.74 . \) The degree of dissociation will be
A . 91.3\%
B. 87\%
c. \( 100 \% \)
D. 74\%
| 1 |
Chemistry
|
The minimum height required to convert the stored potential energy of water into electric energy is
\( \mathbf{A} \cdot 54 M \)
B. \( 34 M \)
c. \( 100 M \)
D. \( 5 ~ M \)
| 3 |
Physics
|
A generator with a circular coil of 100
turns of area \( 2 \times 10^{-2} m^{2} \) is immersed
in a \( 0.01 T \) magnetic field and rotated at a frequency of \( 50 H z . \) The maximum emf which is produced during a cycle is
\( \mathbf{A} \cdot 6.28 V \)
B . \( 3.44 V \)
\( c \cdot 10 V \)
D. \( 1.32 V \)
| 3 |
Physics
|
Carbon dioxide acceptor in \( C_{3} \) plants is
A. PEP
B. RuBP.
c. PGA
D. NADP.
| 0 |
Biology
|
Two neutral conducting spheres are next to each other and touching each
other, They are also each separated from the table with an insulating stand.
Then, a negatively charged rod is brought near, but not touching, sphere
A. The two spheres are then separated
by touching only their insulating base Finally, the charged rod is removed. What are the charges of sphere \( A \) and
sphere B?
A. Sphere A is positive while sphere B is negative
B. Sphere A is negative while sphere B is positive
c. Both spheres are positively charged.
D. Both spheres are negatively charged
| 3 |
Physics
|
The chemical substances used to bring down body temperature in a high fever
are known as:
| 1 |
Chemistry
|
What happens to the current in the external circuit when a battery ages?
A. Remain the same
B. Polarize
c. Reverse direction
D. Increase
E. Decrease
| 3 |
Physics
|
\( A B C D \) is parallelogram. \( L \) and \( M \) are points on \( A B \) and \( D C \) respectively such that \( A L=C M . \) The diagonal \( B D \)
intersects \( L M \) at point \( O . \) If \( A B= \) \( 14 c m, A D=9 c m \) and \( L O=5 c m, \) find
the length of \( M O \)
| 2 |
Maths
|
Which of the following has the highest
mass?
A. 1 mole of \( C \) atoms
в. \( \frac{1}{2} \) mole of \( C H_{4} \)
c. \( 10 \mathrm{ml} \) of water
D. \( 3.011 \times 10^{23} \) a toms of oxygen
| 1 |
Chemistry
|
If the quotient is terminating decimal, the division is complete only when
A. we get the remainder 1
B. we get the remainder zero
c. we get the remainder as the repeated numbers
D. All of the above
| 2 |
Maths
|
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