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A ball is thrown at an angle of incidence
\( \boldsymbol{\theta}^{\prime} \) on a horizontal plane such that the incident direction and the reflected
direction are at right angles to each other if the coefficient of restitution is
'e' then' \( \theta \) 'is equal to
A \( \cdot \tan ^{-1}(e) \)
B \( \cdot \tan ^{-1}(2 e) \)
c. \( \tan ^{-1}(\sqrt{2} e) \)
D. \( \tan ^{-1}(\sqrt{e}) \)
| 3 |
Physics
|
Short / Long type answer type questions. Why does the lymph contain much less proteins than the plasma?
| 0 |
Biology
|
In which of the following groups, the majority of plant orders contain the vascular tissue wherein the vessels and
companion cells are absent in the xylem and phloem?
A. Angiosperms
B. Thallophytes
c. Bryophytes
D. Gymnosperms
| 0 |
Biology
|
Which of the following is not a synthetic polymer?
A. Polyisoprene
B. Polybutadiene
c. Polyethylene terephathalate
D. Polyethylene
| 1 |
Chemistry
|
Which of the following functions
represent a wave
A \( \cdot(x-v t)^{2} \)
B. \( \log (x+v t) \)
c. \( e^{-(x-v t)^{2}} \)
D. \( \frac{1}{x+v t} \)
| 3 |
Physics
|
If a \( 5 \mathrm{cm} \) long capillary tube with \( 0.1 \mathrm{mm} \)
internal diameter, open at both ends,
is slightly dipped in water having surface tension 75 dyne \( / \mathrm{cm}, \) state whether:
water will overflow out of the upper end
of capillary. Explain your answer
| 3 |
Physics
|
What is the \( p H \) of a solution containing
the following zwitter ion species?
| 1 |
Chemistry
|
Which of the following is an example of indirect proportion?
A. Number of mangoes in a bag and weight of the bag.
B. Earning and hours worked.
c. More the speed, lesser the time taken
D. None of these.
| 2 |
Maths
|
From figure,which of the curve is
considered as the reversible process?
A. Curve A
B. Curve B
\( c \cdot \) Curve \( C \) and \( D \)
D. None of these
| 3 |
Physics
|
An azeotropic mixture of two liquids
boils at a lower temperature than either of them when :
A . it is saturated
B. it does not deviate from Raoult's law
c. it shows negative deviation from Raoult's law
D. it shows positive deviation from Raoult's law
| 1 |
Chemistry
|
If we place our hand below a lighted electric bulb. We feel warmer because of
A. convection
B. radiation
c. conduction
D. both A and B
| 3 |
Physics
|
What is the function of the evaporator
in a refrigerator?
A. The evaporator supplies the heat to the substance, which is to be cooled
B. The evaporator absorbs the heat from the atmosphere
c. The evaporator absorbs the heat from the substance which is to be cooled.
D. Both a and
| 3 |
Physics
|
A mixture of ordinary hydrogen and its isotope, tritium (whose nucleus is approximately three times massive than ordinary hydrogen) is excited and its spectrum is studied. Calculate the
shift in wavelength for the \( H_{\alpha} \) lines in
Balmer series. \( \boldsymbol{R}_{\infty}=\mathbf{1 0 9 7 3 7 0 0 m}^{-1} \)
mass of the proton \( M_{H}=1.67 \times \)
\( 10^{-27} k g, \) mass of electron, \( m=9.1 \times \)
\( 10^{-31} k g \)
A \( \cdot \frac{6}{36} R_{H} \)
в. \( \frac{5}{36} R_{H} \)
c. \( \frac{7}{36} R_{H} \)
D. \( \frac{8}{36} R_{H} \)
| 3 |
Physics
|
\( A \subset B \) then show that \( A \cap B \) and \( A \backslash \)
\( B \) (use Venn diagram)
| 2 |
Maths
|
Which option is an example of interest on interest?
A. simple interest
B. compound interest
c. complex interest
D. annual interest
| 2 |
Maths
|
A thin uniform rod of length \( L \) is bent at its mid point as shown in figure. The distance of the centre of mass from the
point \( \boldsymbol{L} \) is
A \( \cdot \frac{L}{4} \)
в. \( \frac{L}{4} \sin (\theta / 2) \)
c. \( \frac{L}{4} \cos (\theta / 2) \)
D. \( \frac{L}{2} \cos (\theta / 2) \)
| 3 |
Physics
|
Which of the following statements is
correct for \( \boldsymbol{C} \boldsymbol{s} \boldsymbol{B} \boldsymbol{r}_{3} \)
A. It is covalent compound
B. It contains \( C s^{3+} \) and \( B r \)
c. It contains \( C s^{+} \) and \( B r_{3}^{-} \)
D. It contains \( C s^{+} \) and \( B r^{-} \) and lattice \( B r_{2} \) molecule
| 1 |
Chemistry
|
Protozoans thrive successfully in diverse conditions owing to their
A. Motility
B. Rapid reproduction
c. Ability to manufacture food
D. Specialised organelles
| 0 |
Biology
|
What is qualitative analysis?
A. Identification of unknown substance by direct observation
B. Identification of unknown substance by chemical tests
C. Both A \& B
D. None of the above
| 1 |
Chemistry
|
At a frequency \( \omega_{0} \) the reactance of a certain capacitor equals that of a certain inductor. If frequency is
changed to \( 2 \omega_{0} . \) The ratio of reactance
of the inductor to that of the capacitor is
\( A \cdot 4: 1 \)
B. \( \sqrt{2}: 1 \)
c. \( 1: 2 \sqrt{2} \)
D. 1: 2
| 3 |
Physics
|
If uncertainty in momentum of electron is three times the uncertainty in position, then uncertainty in velocity of electron would be:
A \( \cdot \frac{1}{4 m} \sqrt{\frac{h}{3 \pi}} \)
в. \( \frac{1}{3 m} \sqrt{\frac{h}{\pi}} \)
c. \( \frac{1}{3 m} \sqrt{\frac{4 \pi}{h}} \)
D. \( \frac{1}{2 m} \sqrt{\frac{3 h}{\pi}} \)
| 1 |
Chemistry
|
The probabilities of three events \( A, B \& \) \( C \operatorname{are} P(A)=0.6, P(B)=0.4 \) and \( P(C)=0.5 \)
If \( P(A \cup B)=0.8, P(A \cap C)=0.3, P(A \cap \)
\( B \cap C)=0.2 \& P(A \cup B \cup C) \geq 0.85 \)
Find the range of \( \mathrm{P}(B \cap C) \)
B . [0.25,0.35]
c. [0.2,0.3]
D. [0.2,0.4]
| 2 |
Maths
|
The surroundings become warm when
water in lakes start freezing in cold
countries. Why?
| 3 |
Physics
|
Fill in the blanks so as to make the
statement true:
Two rational numbers are said to be
equal, if they have the same form.
| 2 |
Maths
|
A boy on a cycle pedals a circle of 20
metres radius at a speed of 20 metre/sec. The combined mass of the
boy and the cycle is 90 kg. The angle that the cycle makes with the vertical so that it may not fall is
\( \left(\boldsymbol{g}=\mathbf{9} . \boldsymbol{8 m} / \mathbf{s e c}^{2}\right) \)
\( \mathbf{A} \cdot 60.25 \)
B . 63.90
c. \( 26.12^{\circ} \)
D. \( 30.00^{\circ} \)
| 3 |
Physics
|
Who conducted in vitro synthesis of
DNA ?
| 0 |
Biology
|
A double convex lens of focal \( 30 \mathrm{cm} \) is made of glass of refractive index 1.6 When it is immersed in a liquid, the focal length becomes \( 126 \mathrm{cm} \). The refractive index of the liquid is :
A . 1.4
B. 1.5
\( c \cdot 1.33 \)
D. 1.6
| 3 |
Physics
|
Most of the plants contain a green colouring pigment which is responsible for photosynthesis. This pigment was named chlorophyll by
A. Melvin Calvin
B. Jean Senebier
c. Julius Robert Mayer
D. Pelletier and Caventou
| 0 |
Biology
|
A square-shaped wire loop of mass \( m \)
resistance \( \boldsymbol{R} \) and side a moving with
speed \( v_{0}, \) parallel to the \( x \) -axis, enters a
region of uniform magnetic field \( B \) which is perpendicular to the plane of the loop. The speed of the loop changes with distance \( x(x<a) \) in the field, as
A \( \cdot v_{0}-\frac{B^{2} a^{2}}{R m} x \)
B. \( _{v_{0}-\frac{B^{2} a^{2}}{2 R m} x} \)
c. \( _{v_{0}+} \frac{B^{2} a}{R m} x \)
D. \( v \)
| 3 |
Physics
|
A ray of light is incident on the plane mirror at rest. The mirror starts turning
at a uniform acceleration of \( \pi r a d / s^{2} \) about an axis in plane of mirror. The reflected ray, at the end of \( \frac{1}{4} s \) must have turned through
A \( .90^{\circ} \)
B . \( 45^{\circ} \)
\( c \cdot 22.5^{\circ} \)
D. \( 11.25^{\circ} \)
| 3 |
Physics
|
Which one of the following substance possesses the highest elasticity?
A . rubber
B. glass
c. steel
D. copper
| 3 |
Physics
|
How Lewis dot structure helps in understanding bond formation between
atoms?
| 1 |
Chemistry
|
A cylinder containing an ideal gas is in a vertical position and has a piston of
mass \( M \) that is able to move up or
down without friction. If the
temperature is increased, then :
A. Both \( P \) and \( V \) of the gas will change
B. Only \( P \) will increase according to Charles's law
c. \( V \) will change but not \( P \)
D. \( P \) will change but not \( V \)
| 1 |
Chemistry
|
The equation \( \boldsymbol{y}=\boldsymbol{4}+\boldsymbol{2} \sin (\boldsymbol{6} \boldsymbol{t}-\boldsymbol{3} \boldsymbol{x}) \)
represents a wave motion with
This question has multiple correct options
A. amplitude 6 units
B. amplitude 2 units
c. wave speed 2 units
D. wave speed \( 1 / 2 \) units
| 3 |
Physics
|
One situation where mean would be
appropriate representative value
| 2 |
Maths
|
A point \( P \) is outside a circle at a
distance of \( 13 \mathrm{cm} \) from its centre.
secant from \( P \) cuts the circle in \( Q \) and
\( R \) such that \( Q R=7 \mathrm{cm} \) and the
segment \( P Q \) of the secant, exterior to
the circle is \( 9 \mathrm{cm} . \) Therefore, the radius
of circle is
A. 3 cm
в. 4 ст
\( c .5 \mathrm{cm} \)
D. \( 6 \mathrm{cm} \)
| 2 |
Maths
|
Petroleum, Coal and natural gas are fossil fuels.
A . True
B. False
| 1 |
Chemistry
|
A drug becomes ineffective after \( 30 \% \) decomposition. The original concentration of a sample was \( 5 \mathrm{mg} / \mathrm{ml} \) which becomes \( 4.2 \mathrm{mg} / \mathrm{ml} \) in 20 months. The expiry time of the drug in months assuming the first order decomposition is:
A. 41 months
B. 79 months
c. 20 months
D. 60 months
| 1 |
Chemistry
|
In an LED, the longer lead is always
connected to the terminal
of the battery and the shorter lead is
connected to the
terminal of the cell (or battery)
A. positive, negative
B. negative, positive
c. positive, neutral
D. neutral, positive
| 3 |
Physics
|
A flywheel making 120 r.p.m is acted upon by a retarding torque producing
angular retardation of \( \pi \) rad/ \( s^{2} \). Time taken by it to come to rest is:
A . 1 s
B. 2 s
c. 3 s
D. 4 s
| 3 |
Physics
|
The total number of species in the
order Welwitchiales is
\( A \cdot 3 \)
B. 5
\( c \)
\( D \)
| 0 |
Biology
|
An object has a mass \( m \) kg on earth.
What will be its mass on the moon?
A. \( m \) kg
в. \( 6 m \) кg
c. \( \frac{m}{6} \) kg
D. zero
| 3 |
Physics
|
The magnetic field at the centre of
circular loop in the circuit carrying
current \( I \) shown in the figure is :
A \( \cdot \frac{\mu_{0}}{4 \pi} \frac{2 I}{r}(1+\pi) \)
в. \( \frac{\mu_{0}}{4 \pi} \frac{2 I}{r}(\pi-1) \)
c. \( \frac{\mu_{0}}{4 \pi} \frac{2 I}{r} \)
D. \( \frac{\mu_{0}}{4 \pi} \frac{I}{r}(\pi+1 \)
| 3 |
Physics
|
The point in the \( x y- \) plane which is
equidistant from (2,0,3),(0,3,2) and (0,0,1) is
A \( .(1,2,3) \)
В. (-3,2,0)
c. (3,-2.0)
D. (3,2,0)
E \( .(3,2,1) \)
| 2 |
Maths
|
Find the gain or loss percent if \( \boldsymbol{C P}= \) Rs. \( \mathbf{7 0 0} \) and \( \boldsymbol{S . P}=\boldsymbol{R s . 6 3 0} \)
| 2 |
Maths
|
Inertia means resistance to the change
of state.
A . True
B. False
| 3 |
Physics
|
Urine is always fluid except in
A. Birds
B. Humans
c. Amphibians
D. Mammals
| 0 |
Biology
|
State Lenz's law.
| 3 |
Physics
|
\( \int \frac{1}{\left(x^{2}-1\right)\left(x^{2}+2\right)} d x= \)
A. \( \frac{1}{3}\left[\frac{1}{2} \log \left|\frac{x+1}{x-1}\right|-\frac{1}{\sqrt{2}} \tan ^{-1} \frac{x}{\sqrt{2}}\right]+c \)
B \( \cdot \frac{1}{3}\left[\frac{1}{2} \log \left|\frac{x-1}{x+1}\right|+\frac{1}{\sqrt{2}} \tan ^{-1} \frac{x}{\sqrt{2}}\right]+c \)
c. \( \frac{1}{3}\left[\frac{1}{2} \log \left|\frac{x-1}{x+1}\right|-\frac{1}{\sqrt{2}} \tan ^{-1} \frac{x}{\sqrt{2}}\right]+c \)
D. \( \frac{1}{3}\left[\frac{1}{3} \log \left|\frac{x-1}{x+1}\right|-\frac{1}{2 \sqrt{2}} \tan ^{-1} \frac{x}{\sqrt{2}}\right]+c \)
| 2 |
Maths
|
A close cylindrical tank of diameter
\( 14 m \) and height \( 5 m \) is made from a
sheet of metal. How much sheet of
metal will be required.
| 2 |
Maths
|
At an examination in which maximum
marks are \( 500 . \) P got \( 10 \% \) less than \( Q, Q \)
\( \operatorname{got} 25 \% \) more than \( \mathrm{R} \) and \( \mathrm{R} \) got \( 20 \% \) less
than S. If P got 360 marks what
percentage of marks was obtained by
?
| 2 |
Maths
|
The points at which the tangents to the curve \( y=x^{3}-12 x+18 \) are parallel to
x-axis are?
A \( \cdot(2,-2),(-2,-34) \)
в. (2,34),(-2,0)
c. (0,34),(-2,0)
D. (2,2),(-2,34)
| 2 |
Maths
|
In how many ways can 21 English and 19 Hindi books be placed in a row so that
no two Hindi are together?
A \( \cdot 1540 \)
B. 1450
\( c \cdot 1504 \)
D. 1405
| 2 |
Maths
|
When the number of turns in a coll is
doubled without any change in the length of the coll, its self-inductance
becomes
A. four times
B. Double
c. Halved
D. Not change
| 3 |
Physics
|
Orthophosphoric acid is commonly known as pyro phosphoric acid.
A. True
B. False
| 1 |
Chemistry
|
Boron is diagonally related to:
A. boron
B. aluminium
c. magnesium
D. silicon
| 1 |
Chemistry
|
Hexokinase (Glucose + ATP 一
Glucose \( 6-P+A D P \) ) belongs to the
category
A. Transferases
B. Lysases
c. oxidoreductases
D. Isomerases
| 0 |
Biology
|
Assertion
Number of waves in an orbit of atom is
equal to number of that orbit,
Reason
Number of waves in an orbit is derived by \( \frac{2 \pi r_{n}}{\lambda} \)
Read the above assertion and reason
and choose the correct option regarding
¡t
A. Statement is correct but Explanation is wrong.
B. Statement is wrong but Explanation is correct.
c. Both Statement and Explanation are correct and Explanation is the correct explanation for Statement
D. Both Statement and Explanation are correct but Explanation is not the correct explanation for Statement
| 1 |
Chemistry
|
A parallel plate capacitor of capacitance \( C \) is connected to a battery and is charge to a potential difference
\( V . \) Another capacitor of capacitor \( 2 C \) is similarly charged to a potential
difference \( 2 V . \) The charging battery is now disconnected and the capacitors are connected in parallel to each other in such a way that the positive terminal of one is connected to the negative terminal of the other. The final energy of the configuration is:
A . zero
B \( \cdot(3 / 2) C V^{2} \)
\( \mathbf{c} \cdot 25 / 6 C V^{2} \)
\( \mathbf{D} \cdot(9 / 2) C V^{2} \)
| 3 |
Physics
|
A uniform cylinder of mass \( M \) and
radius \( R \) has a string wrapped around
it. The string is held fixed and the
cylinder falls vertically, as in figure. Show that the acceleration of the
cylinder is downward with magnitude \( \boldsymbol{a}=\frac{\mathbf{2} \boldsymbol{g}}{\mathbf{3}} \)
| 3 |
Physics
|
Light is
A. An electromagnetic radiation
B. A transverse wave
c. Massless
D. All of the above
| 3 |
Physics
|
Two radioactive substances \( X \) and \( Y \)
initially contain equal number of atoms
Their half-lives are 1 hour and 2 hours
respectively. Then the ratio of their rates of disintegration after four hours is:
A . 1: 1
B . 2: 1
c. 1: 2
D. 2: 3
| 3 |
Physics
|
Organisms attached to substratum
generally possess
A. Asymmetrical body
B. Radial symmetry
c. one single opening of digestive canal
D. cilia on the surface to create water current
| 0 |
Biology
|
The diagram given shows a piston fitted
in a cylinder. The most suitable
inference that can be drawn from it is
that
A. the piston is smooth
B. the particles can be compressed or brought closer by applying pressure
c. the handle of piston is long
D. None of the above
| 1 |
Chemistry
|
gravity \( g \) with distance \( d \) trom centre of
the earth is best represented by \( (\boldsymbol{R}= \)
Earths radius):
\( A \)
\( B \)
\( c \)
\( D \)
| 3 |
Physics
|
The function of adding cryolite in the electrolyte reduction of alumina by HallHeroult process is to:
This question has multiple correct options
A. dissolve alumina
B. lower melting point of alumina
c. lower the fuel bill
D. increase the electrical conductivity of alumina
| 1 |
Chemistry
|
Assertion
Assertion : The elastic spring force arises due to the net attraction or
repulsion between the neighbouring atoms of the spring when it is elongated or compressed.
Reason
Reason: The laws of derived forces such
as spring force, friction force are
independent of the laws of fundamental
forces in nature.
A. both assertion and reason are true and reason is the correct explanation of assertion.
B. both assertion and reason are true and reason is not the correct explanation of assertion.
c. assertion is true but reason is false
D. both assertion and reason are false.
| 3 |
Physics
|
The diagram above 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
|
is a list of numbers in which
each term is obtained by adding a fixed number to the preceding term except
the first term.
A . Geometric value
B. Geometric series
c. Arithmetic progression
D. Arithmetic mean
| 2 |
Maths
|
An organic compound \( (A) \) of molecular
formula \( C_{2} H_{5} N O \) reacts with
\( B r_{2} / N a O H \) to give compound \( (B) \) of molecular formula \( \boldsymbol{C} \boldsymbol{H}_{5} \boldsymbol{N} .(\boldsymbol{A}) \) is
reduced by \( L i A l H_{4} \) to give cmpound
\( (C) \) of formula \( C_{2} H_{7} N . \) Identify \( (A),(B) \) and \( (C) \)
| 1 |
Chemistry
|
\( \boldsymbol{X} \boldsymbol{C l}_{2}(\boldsymbol{e} \boldsymbol{x} \boldsymbol{c e s s})+\boldsymbol{Y} \boldsymbol{C l}_{2} \longrightarrow \boldsymbol{X} \boldsymbol{C l}_{4}+ \)
\( \boldsymbol{Y} \downarrow \)
\( \boldsymbol{Y} \boldsymbol{O} \frac{\boldsymbol{\Delta}}{>400} \frac{1}{2} \boldsymbol{O}_{2}+\boldsymbol{Y} \)
Ore of \( Y \) would be:
A. Siderite
B. Malachite
c. Hornsilver
D. cinnabar
| 1 |
Chemistry
|
Say true or false:
The zeros of the polynomial \( x^{2}-14 x+ \)
49 are equal to 7
A. True
B. False
| 2 |
Maths
|
8 drops of equal radius coleasec to form
a bigger drop. The ratio of surface energy of bigger drop to smaller one is?
A . 1: 2
B . 2: 1
c. 1: 4
D. 4: 1
| 3 |
Physics
|
\( \lim _{x \rightarrow 0} \frac{x-\sin x}{x+\cos ^{2} x}= \)
\( \mathbf{A} \cdot \mathbf{0} \)
B.
\( c \cdot-1 \)
D.
| 2 |
Maths
|
The volume of a cube is increasing at
the rate of \( 8 c m^{3} / s . \) How fast is
the surface area increasing when the
length of an edge is \( 12 \mathrm{cm} ? \)
| 2 |
Maths
|
What happens when both of the orbitals in a molecule are in phase, either both
positive or both negative and the electrons in the bonds are at their
lowest energy level?
A. Bonding takes place.
B. The chemicals don't react.
c. The atoms don't bond
D. Bonding doesn't take place.
E. The electrons in the atoms don't share orbitals
| 1 |
Chemistry
|
The clinical thermometer is designed to
measure the temperature of
A. Human body
B. Bodies kept in refrigerators
c. Room temperature
D. boiling water
| 3 |
Physics
|
Lysigenous cavity and 'Y'-shaped xylem
occurs in
A. Dicot stem
B. Monocot root
c. Monocot stem
D. Dicot root
| 0 |
Biology
|
Temperature is considered as the most ecologically relevant environmental factor because it affects of
organisms
A. physiology
B. morphology
c. geographical distribution
D. all of these
| 0 |
Biology
|
Give the IUPAC names of the following compounds:
Oxalic acid
| 1 |
Chemistry
|
In which of the following process, the bond order increases and magnetic behaviour changes?
\( \mathbf{A} \cdot N_{2} \longrightarrow N_{2}^{+} \)
B . \( C_{2} \longrightarrow C_{2}^{+} \)
c. \( N O \rightarrow N O^{+} \)
D. \( O_{2} \rightarrow O_{2}^{+} \)
| 1 |
Chemistry
|
In Albugo, the food reserve is mostly
A. Glycogen
B. Volutin granules
C. Protien granules
D. Fat
| 0 |
Biology
|
Draw a diagram of AC generator and describe it. Derive an expression for instantaneous value of induced emf
| 3 |
Physics
|
Draw the tangents to the circle from the
point \( L \) with radius \( 2.9 \mathrm{cm} . \) Point \( ^{\prime} L^{\prime} \) is
at a distance \( 7.5 \mathrm{cm} \) from the centre
\( \boldsymbol{M}^{\prime} \)
| 2 |
Maths
|
Write the full form of G-6-PD
| 0 |
Biology
|
A particle is travelling in a circular path of radius 4 m. At certain instant the
particle is moving at \( 20 \mathrm{m} / \mathrm{s} \) and its
acceleration is at an angle of \( 37^{\circ} \) from the direction to the centre of the circle
as seen from the particle.
(i) At what rate is the speed of the particle increasing?
(ii) What is the magnitude of the acceleration?
| 3 |
Physics
|
Assertion
A rate of reaction of most of the
reactions doubles, when temperature
increased from \( 298 K \) to \( 308 K \)
Reason
The activation energy of reaction
decreases with increase in
temperature.
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
|
How many obligate categories constitute hierarchy of categories?
| 0 |
Biology
|
What is the oxidation state of coloured
ion in \( \boldsymbol{C r} \boldsymbol{O}_{4}^{2-} \) ?
| 1 |
Chemistry
|
Explain the following:
Concentrated nitric acid appears yellow when it is left standing in a glass bottle.
| 1 |
Chemistry
|
2.5 molar sulphuric acid contains:
This question has multiple correct options
A. \( 29.5 \mathrm{g} \) of sulphuric acid per litre of solution.
B. \( 245.0 \mathrm{g} \) of sulphuric acid per \( 1000 \mathrm{ml} \) of solution.
C. \( 24.5 \mathrm{g} \) of sulphuric acid per \( 100 \mathrm{ml} \) of solution.
D. 59.0 g of sulphuric acid per litre of solution.
| 1 |
Chemistry
|
Can we get hydrogen and oxygen by setting up an arrangement for passing current through distilled water? Why?
| 1 |
Chemistry
|
When the angle of incidence on a
material is \( 60^{\circ} \), the reflected light is
completely polarised. The velocity of the refracted ray inside the material is
A . \( 3 \times 10^{8} \)
B. \( \frac{3}{\sqrt{2}} \times 10^{8} \)
c. \( \sqrt{3} \times 10^{8} \)
D. \( 0.5 \times 10^{8} \)
| 3 |
Physics
|
When the coil and magnet both are stationary
A. voltage increased
B. current is induced
c. voltage is induced
\( D . \) none
| 3 |
Physics
|
The period of a simple pendulum inside a satellite orbiting earth is
A . zero
B. \( \infty \)
c. can be any integer
D. cant say
| 3 |
Physics
|
The common chord of the circles \( x^{2}+ \)
\( \boldsymbol{y}^{2}-\mathbf{4} \boldsymbol{x}-\mathbf{4} \boldsymbol{y}=\mathbf{0} \) and \( \mathbf{2} \boldsymbol{x}^{2}+\mathbf{2} \boldsymbol{y}^{2}=\mathbf{3} \mathbf{2} \)
subtends at the origin an angle equal to
A \( \cdot \frac{\pi}{3} \)
B.
c.
D.
| 2 |
Maths
|
The graph between applied force and change in the length of wire within elastic limit is a
A. Straight line with positive slope
B. Straight line with negative slope
c. curve with positive slope
D. curve with negative slope
| 3 |
Physics
|
A kite is flying with the string inclined
at \( 75^{\circ} \) to the horizon. If the length of the
string is \( 25 m \), then height of the kite is :
A \( \cdot\left(\frac{25}{2}\right)(\sqrt{3}-1)^{2} \)
B. \( \left(\frac{25}{2}\right)\left(\frac{\sqrt{3}+1}{\sqrt{2}}\right) \)
c. \( \left(\frac{25}{2}\right)(\sqrt{3}+1)^{2} \)
D. \( \left(\frac{25}{2}\right)(\sqrt{6}+\sqrt{2}) \)
| 2 |
Maths
|
What do you mean by the following:
i. Sewage
ii. Eutrophication
iii. Recycling
| 1 |
Chemistry
|
If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of:
A \( \cdot C u S O_{4} \)
в. \( C u C O_{3} \)
\( \mathbf{c} \cdot C u\left(N O_{3}\right)_{2} \)
D. \( C u O \)
| 1 |
Chemistry
|
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