SSC CGL 2015: GENERAL SCIENCE

1. The gas usually filled in electric bulb is —

(A) Hydrogen

(B) Oxygen

(C) Nitrogen

(D) Carbon di-oxide

2. Heavy water is —

(A) Tritium oxide

(B) Deuterium oxide

(C) Rain water

(D) Water at 4°C

3. The gases used in different types of welding would include —

(A) Oxygen & Hydrogen

(B) Oxygen, acetylene & argon

(C) Oxygen & acetylene

(D) Oxygen, hydrogen & nitrogen

4. Which of the following alloys is used for making magnets ?

(A) Duralumin

(B) Stainless Steel

(C) Alnico

(D) Magnelium

5. Parmanent hardness of water may be removed by the addition of —

(A) Alum

(B) Sodium Carbonate

(C) Lime

(D) Potassium Permanganate

6. Potassium nitrate is used in —

(A) Salt

(B) Glass

(C) Fertiliser

(D) Medicine

7. In which type of rocks are metals like Gold and Copper mostly found ?

(A) Old igneous

(B) Old sedimentary

(C) Old metamorphic

(D) New metamorphic

8. Which of the following gases is lighter than air ?

(A) Carbon dioxide

(B) Oxygen

(C) Ammonia

(D) Chlorine

9. Which of the following is used as lubricant ?

(A) Graphite

(B) Silica

(C) Diamond

(D) Iron Oxide

10. The purest form of iron is —

(A) Steel

(B) Pig iron

(C) Cast iron

(D) Wrought iron

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