SSC CGL 2015: GENERAL SCIENCE

1. The element required for Solar energy conversion —

(A) Beryllium

(B) Silicon

(C) Tantalum

(D) Ultra pure carbon

2. Monazite is an ore of —

(A) Sodium

(B) Titanium

(C) Thorium

(D) Zirconium

3. Potassium Permanganate is used for purifying drinking water, because —

(A) It dissolves the impurities of water

(B) It is a sterilizing agent

(C) It is an oxidising agent

(D) It is a reducing agent.

4. The presence of which of the following salts in water causes corrosion in steam boilers ?

(A) Sodium Chloride

(B) Magnesium Chloride

(C) Calcium bicarbonate

(D) Potassium bicarbonate

5. Water is a good solvent of ionic salts because —

(A) It has no colour

(B) It has a boiling point

(C) It has a high dipole moment

(D) It has a high specific heat

6. The hardest substance available in earth is —

(A) Platinum

(B) Silicon

(C) Diamond

(D) Gold

7. Which of the following is the best conductor of electricity ?

(A) Zinc

(B) Copper

(C) Gold

(D) Silver

8. The ratio of pure gold in 18 carat gold is —

(A) 60%

(B) 75%

(C) 80%

(D) 100%

9. Cow milk is a rich source of —

(A) Vitamin A

(B) Vitamin B1

(C) Vitamin C

(D) Vitamin D

10. The element found in the surface of the Moon is —

(A) Tin

(B) Tungsten

(C) Tantalum

(D) Titanium

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