GENERAL SCIENCE NOTES FOR SSC CHSL

GENERAL SCIENCE NOTES FOR SSC CHSL

FREE EXAM:- Important Indian Polity Questions for SSC CHSL 2017-18

1. The colours in thin films of soap bubbles are seen due to scattering
of light.

2. Light radiation is both of wave and particle nature.

3. When a light ray enters from air into glass, it’s wavelength decreases.

4. An air bubble in water acts as a concave lens.

5. Steel is used for making permanent magnets.

6. Lenz’s law is based on energy conservation.

7. Transformer is used for stepping up or stepping down the a.c

voltage.

8. Thorium is used as a fuel in the fest breeder reactor of kalpakkam.

9. Polonium was discovered by Madam Marie Curie. She named
the newly discovered element Polonium in honour of her native
land Poland.

10.Discovery/Invention

(i) Transistor W. Shockley (1958

(ii) Typewriter Sholz (1868)

(iii) Air Conditioner Wills Heavyland Carrier

(iv) Dynamo Hypolite Pixie (1832)

(v) Microphone Berline (1877)

11.Cadmium being a good absorber of neutrons is used as a controller
in nuclear reactor.

12.The ‘Apsara’ reactor in India is called the swimming pool reactor’
because in it heavy water is used as a moderator.

13.Cobalt 60 is generally used in radiation therapy
because it emits y-rays.

14.Infinite images of an object are formed that is placed between
two parallel mirrors.

15.Velocity of light, amplitude and wavelength changes in
refraction of light but frequency remains unchanged.

16.Pitch of sound is determined by its frequency.

17.Longitudinal waves can’t be polarized.

18.Refractive index of red light is lesser than the refractive index for
violet light.

19.Thermal energy is more largely produced in India in
comparison to other forms of energy.

20.Atomic bomb is based on nuclear fission and
hydrogen bomb is based on nuclear fusion.