CDS Questions

GC Matter

Which one of the following is an example of chemical change?

  1. Burning of paper
  2. Magnetization of soft iron
  3. dissolution of cane sugar in water
  4. Preparation of ice cubes from water

GB Living Organisms

Plants contain a variety of sterols like stigmasterol, ergosterol, sitosterol etc., Which very closely resemble cholesterol. These plant sterols are referred as:

  1. Phytosterols
  2. Calciferols
  3. Ergocalciferols
  4. Lumisterols

GB Life Processes

In artificial insemination (AI) process, which of the following is/are introduced into the uterus of the female?

  1. Egg only
  2. Fertilized egg
  3. Sperm only
  4. Egg and sperm

GB Food Nutrition GB Health

Which one of the following vitamins has a role in blood clotting?

  1. Vitamin A
  2. Vitamin B
  3. Vitamin D
  4. Vitamin K

GB Food Nutrition

Glucose is a source of energy. Which one of the following types of molecule is Glucose?

  1. Carbohydrate
  2. Protein
  3. Fat
  4. Nucleic acid

GB Cells Tissues

The living content of cell is called protoplasm. It is composed of:

  1. Cytoplasm only
  2. Cytoplasm and nucleoplasm
  3. Nucleoplasm only
  4. Cytoplasm, nucleoplasm and other organelles

GB Food Nutrition GB Health

Which one of the following pairs of vitamin and diseases is/are correctly matched?

  1. Vitamin A : Rickets
  2. Vitamin B1 : Beriberi
  3. Vitamin C : Scurvy

Select the correct answer using the code given below:

  1. 2 only
  2. 2 and 3 only
  3. 1 and 3 only
  4. 1, 2 and 3

GP Light

A myopic person has a power of -1.25 Dioptre. What is the focal length and nature of his lens?

  1. 50 cm and convex lens
  2. 80 cm and convex lens
  3. 50 cm and concave lens
  4. 80 cm and concave lens

GP Heat

A piece of ice, 100 g in mass is kept at 0°C. The amount of heat it requires to melt at 0°C is (take latent heat of melting of ice to be 333.6 J/g):

  1. 750.6 J
  2. 83.4 J
  3. 33360 J
  4. 3.336 J

GP Sound Waves

A person rings a metallic bell near a strong concrete wall. He hears the echo after 0.3 s. If the sound moves with a speed of 340 m/s, how far is the wall from him?

  1. 102 m
  2. 11 m
  3. 51 m
  4. 30 m

GP Measurement

The SI unit of mechanical power is:

  1. Joule
  2. Watt
  3. Newton-second
  4. Joule-second

GP Heat

Two system are said to be in thermal equilibrium if and only if:

  1. there can be a heat flow between them even are at different temperatures
  2. there cannot be a heat flow between them even if they are at different temperatures
  3. there is no heat flow between them
  4. their temperature are slightly different

GC Atomic Structure

The mass number of an atom is determined by

  1. the number of protons only
  2. adding the number of neutrons and number of electrons
  3. adding the number of protons and number of electrons
  4. adding the number of neutrons and number of protons

GC Atomic Structure

Which of the following pairs represents isoelectronic ions

  1. Mg2+, Ca2+
  2. Na+, K+
  3. K+, Mg2+
  4. Ca2+, S2-

GC Atomic Structure

Which one among the following contains the most neutrons?

  1. 6129Cu
  2. 5926Fe
  3. 6030Zn2+
  4. 6130Zn

GC Atomic Structure

Two atoms are said to be isotopes if

  1. they have the same atomic number but different mass numbers
  2. the sum of the number of protons and neutrons is the same, but the number of protons is different
  3. they have the same number of neutrons but different modes of radioactive decay
  4. they have the same number of neutrons but different mass numbers

GC Atomic Structure

The number of aluminium ions present in 54 g of aluminium (atomic weight 27) is

  1. 2
  2. 18
  3. 1.2 x 1024
  4. 1.1 x 1024

GC Atomic Structure

Which one of the following is the correct electronic configuration of chlorine

  1. 2, 8, 8
  2. 2, 7, 8
  3. 7, 8, 2
  4. 2, 8, 7

GC Atomic Structure

The most of the mass of the atom can be found in

  1. nucleus
  2. electron cloud
  3. charges
  4. electrons

GC Atomic Structure

How many grams of MgCO3 contain 24.00 g of oxygen? (The molar mass of MgCO3 is 84.30 g mol–1)

  1. 42.15 g
  2. 84.30 g
  3. 126.00 g
  4. 154.00 g

GP Light

Which one of the following processes explains the splitting of a beam of white light into its constituent colours?

  1. Polarization
  2. Dispersion
  3. Diffraction
  4. Reflection

GP Light

Consider the following statements:

A real image

  1. can be formed on a screen
  2. is always magnified and inverted

Which of the statements given above is/are correct

  1. 1 only
  2. 2 only
  3. Both 1 and 2
  4. Neither 1 nor 2

GP Light

An optician prescribes a power = - 0.5 dioptre. The corresponding lens must be a

  1. convex lens of focal length 2 m
  2. concave lens of focal length 50 cm
  3. concave lens of focal length 2 m
  4. convex lens of focal length 50 cm

GP Light

If the speed of light in air is 3 x 108 m/s, the speed of light in glass (with refractive index 1.5) would be

  1. 4.5 x 108 m/s
  2. 1.5 x 108 m/s
  3. 2 x 108 m/s
  4. 3 x 108 m/s

GP Light

While looking at the image formed by a convex lens (one half of the lens is covered with black paper), which one of the following will happen to the image?

  1. Half of the image will be visible
  2. One can see an image of smaller size
  3. Intensity of the image will be diminished
  4. Image will be inverted

GP Sound Waves

A sound wave has frequency of 2 kHz and wavelength of 35 cm. If an observer is 1.4 km away from the source, after what time interval could the observer hear the sound?

  1. 0.5 s
  2. 2 s
  3. 4 s
  4. 20 s

GP Sound Waves

Ultrasonic waves of frequency 3 × 105 Hz are passed through a medium where speed of sound is 10 times that in air (Speed of sound in air is 300 m/s). The wavelength of this wave in that medium will be of the order of

  1. 0.1 cm
  2. 1 cm
  3. 10 cm
  4. 100 cm

GP Magnetism

A current-carrying wire is known to produce magnetic lines of force around the conducting straight wire. The direction of the lines of force may be described by

  1. left-hand thumb rule for up-current and right-hand thumb rule for down current
  2. right-hand thumb rule for both up and down currents
  3. right-hand thumb rule for up-current and left-hand thumb rule for down current
  4. left-hand thumb rule for both up and down currents

GP Electricity

During Short circuiting, the current flowing in the electrical circuit

  1. increases instantaneously
  2. reduces substantially
  3. varies continuously
  4. does not change

GP Magnetism

A cyclotron accelerates particles of mass m and change q. The energy of particles emerging is proportional to

  1. q/m2
  2. q2/m
  3. q2/m2
  4. q

GP Electricity

The electric field inside a perfectly conducting hollow object is

  1. infinite
  2. dependent upon the shape of the object
  3. zero

GP Electricity

Van de graaff generator is used for

  1. generating large currents
  2. accelerating charged particles
  3. generating electric field
  4. generating high-frequency voltage

GP Electricity

Two conducting wires A and B are made of same material. If the length of B is twice that of A and the radius of circular cross-section of A is twice that of B, then their resistances RA and RB are in the ratio

  1. 1 : 2
  2. 2 : 1
  3. 1 : 4
  4. 1 : 8

GP Magnetism

A force F, acting on an electric charge q, in presence of an electromagnetic field, moves the charge parallel to the magnetic field with velocity v. Then F is equal to (where E and B are electric field and magnetic field respectively)

  1. q(v x B)
  2. q(v x E)
  3. qB
  4. qE

GP Electricity

Which one of the following circuit elements is an active component?

  1. Transistor
  2. Capacitor
  3. Resistor
  4. Inductor

GP Electricity

A fuse is used in the electric circuit to

  1. break the circuit when power gets off
  2. complete the circuit for flow of current
  3. break the circuit when excessive current flows through the circuit
  4. indicate if the current is flowing uninterrupted

GP Heat

The Celsius temperature is a/an

  1. approximate temperature
  2. absolute temperature
  3. specific temperature
  4. relative temperature

GP Heat

A close bottle containing water at room temperature was taken to the Moon and then the lid is opened. The water will

  1. boil
  2. freeze
  3. not change at all
  4. decompose into oxygen and hydrogen

GP Heat

Heat given to a body which raises its temperature by 1°C is known as

  1. water equivalent
  2. specific heat
  3. temperature gradient
  4. thermal capacity

GP Sound Waves

Bats can fly in dark because they

  1. have strong wings
  2. have sharp eyes
  3. produce ultrasonic waves
  4. are nocturnal

GP Heat

If the door of a running refrigerator in a closed room is kept open, what will be the net effect on the room?

  1. It will make the temperature go up and down
  2. It will make no difference on the average
  3. It will heat the room
  4. It will cool the room

GP Solids Fluids

Bernoulli's principle is based on which one among the following laws

  1. Conservation of momentum
  2. Conservation of angular momentum
  3. Conservation of energy
  4. Conservation of mass

GP Solids Fluids

Which of the following is not a result of surface tension?

  1. Flow of a liquid
  2. Capillary rise
  3. Nearly spherical drop of rain
  4. Removal of dirt by soap or detergent

GP Motion Force

If the motion of an object is represented by a straight line parallel to the time axis in a distance-time graph, then the object undergoes

  1. decelerated motion
  2. uniform non-zero velocity motion
  3. accelerated motion
  4. zero velocity motion

GP Motion Force

A force applied on a body is represented as

F = 6i - 8j + 10k

and accelerates is at 1 m/s2. The mass of the body is

  1. 10√2 kg
  2. 2√10 kg
  3. 8 kg
  4. 10 kg

GP Motion Force

A passenger in a moving train tosses a coin upward which falls behind him. It implies that the motion of the train is

  1. uniform
  2. retarded
  3. accelerated
  4. along the circular tracks

GP Work Energy

Two bodies A and B having masses m and 4m respectively are moving with equal linear momentum. The ratio of kinetic energies between A and B is

  1. 1 : 2
  2. 1 : 1
  3. 4 : 1
  4. 1 : 4

GP Measurement

The dimension of impulse is the same as that of

  1. pressure
  2. angular momentum
  3. linear momentum
  4. work

GP Motion Force

A motor vehicle is moving on a circle with uniform speed. The net acceleration of the vehicle is

  1. perpendicular to the radius and along the velocity
  2. towards the centre of circle
  3. away from the centre along the radius of the circle
  4. zero