SSC CGL 2015 : GENERAL SCIENCE QUIZ

1. Which of the following ores does not contain iron?

(A) Haematite

(B) Magnetite

(C) Limonite

(D) Cassiterite

2. Nuclear fission is caused by the impact of —

(A) Proton

(B) Electron

(C) Neutron

(D) (A) & (b)

3. Which is a good nuclear fuel ?

(A) Uranium — 238

(B) Neptunium — 239

(C) Thorium — 236

(D) Plutonium - 236

4. Long distance photography is facilitated by —

(A) Visible light

(B) X-rays

(C) Infra Red rays

(D) Ultra violet rays

5. Which radioactive pollutant has recently drawn the attention of the public due to its occurance in the building materials ?

(A) Radium

(B) Radon

(C) Thorium

(D) Plutonium

6. In an atomic explosion enormous energy is released which is due to the —

(A) Conversions of neutrons into protons

(B) Conversion of chemical energy into nuclear energy

(C) Conversion of mechanical energy into nuclear energy

(D) Conversion of mass into energy

7. Which of the following is used as a coolant in nuclear reactors ?

(A) Heavy water

(B) Cadmium

(C) Liquid sodium

(D) Graphite

8. The isotope of Uranium capable of sustaining chain reaction is —

(A) U 235

(B) U 238

(C) U 239

(D) None of these

9. Radioactive disintegration of Uranium ultimately results in formation of —

(A) Radium

(B) Thorium

(C) Polonium

(D) Lead

10. Atom bomb is made on the basis of —

(A) Nuclear fusion

(B) Nuclear fission

(C) Both (A) & (B)

(D) None of these

ANSWER KEY:
1 - (D)
2 - (C)
3 - (C)
4 - (C)
5 - (C)
6 - (D)
7 - (C)
8 - (A)
9 - (D)
10- (B)