G.K. Practice Test: Question Set - 02
1. Permanent hardness of water may be removed by the addition of
- (A) Sodium
carbonate
- (B) Alum
- (C) Potassium
permanganate
- (D) Lime
2. Which of the following was to be discovered first in the chromospheres of the sun?
- (A) Krypton
- (B) Xenon
- (C) Neon
- (D) Helium
3. Which of the following are the ingredients of gun metal?
- (A) Iron,
Zinc, Titanium
- (B) Iron, tin
- (C) Iron, Brass,
Tin
- (D) Copper, Tin
4. Actinides are the elements with atomic numbers from
- (A) 97 to 104
- (B) 101 to 115
- (C) 89 to 103
- (D) 36 from 43
5. In fireworks, the green flame is produced because of
- (A) Sodium
- (B) Barium
- (C) Mercury
- (D) Potassium
6. Air is a/an
- (A) Compound
- (B) Element
- (C) Electrolyte
- (D) Mixture
7. Which metal pollute the air of a big city?
- (A) Copper
- (B) Chromium
- (C) Lead
- (D) Cadmium
8. Which of the following is not an isotope of hydrogen?
- (A) Tritium
- (B) Deuterium
- (C) Protium
- (D) Yttrium
9. Potassium Permanganate is used for purifying drinking water, because
- (A) It is a
sterilizing agent
- (B) It
dissolves the impurities of water
- (C) It
is a reducing agent
- (D) It is an
oxidizing agent
10. The property of a substance to absorb moisture from the air on exposure is called
- (A) Osmosis
- (B) Deliquescence
- (C) Efflorescence
- (D) Desiccation
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