Important Science Quiz for NDA/AFCAT/CDSE/OTA

1 / 10

When hydrogen chloride gas is prepared on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to

absorb the evolved gas

moisten the gas

absorb moisture from the gas

absorb Cl–ions from the evolved gas

2 / 10

An atom of an element has the electronic configuration 2,8,2. To which group does it belong?

4th group

6th group

3rd group

2nd group

3 / 10

Give the ratio in which hydrogen and oxygen are present in water by volume.

1:2

1:1

2:1

1:8

4 / 10

Reproduction is essential for living organisms in order to

Keep the individual organism alive

Fulfill their energy requirement

Maintain growth

Continue the species generation after generation

5 / 10

In which group of animals, coelom is filled with blood?

Arthropoda

Annelida

Nematoda

Echinodermata

6 / 10

Which one is a true fish?

Jellyfish

Starfish

Dogfish

Silverfish

7 / 10

Friction always

opposes the motion

helps the motion

both (a) and (b)

none of these

8 / 10

For a current in a long straight solenoid, N- and S-poles are created at the two ends. Among the following statements, the incorrect statement is

the field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid

the strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil

the pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet.

the N- and S-poles exchange position when the direction of current through the solenoid is reversed.

9 / 10

Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object?

15 cm in front of the mirror

30 cm in front of the mirror

between 15 cm and and 30 cm in front of the mirror

more than 30 cm in front of the mirror

10 / 10

Which of the following statements is true?

A convex lens has 4 dioptre power having a focal length 0.25 m

A convex lens has -4 dioptre power having a focal length 0.25 m

A concave lens has 4 dioptre power having a focal length 0.25 m

A concave lens has -4 dioptre power having a focal length 0.25 m.

Your score is

The average score is 35%

Important Science Quiz for NDA/AFCAT/CDSE/OTA

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