GK Practice Test: Question Set - 11
1. Most commonly used bleaching agent is
- (A) Alcohol
- (B) Carbon
dioxide
- (C) Chlorine
- (D) Sodium
chloride
2. The electron was first identified by
- (A) J. J.
Thompson
- (B) J. Kepler
- (C) D.
Rutherford
- (D) James
Chadwick
3. For purifying drinking water alum is used
- (A) For
coagulation of mud particles
- (B) To
kill bacteria
- (C) To remove
salts
- (D) To
remove gases
4. Which is the future fuel?
- (A) Ethanol
- (B) Hydrogen
- (C) Methane
- (D) Natural Gas
5. In the structure of Anti-Matter, the Electron is equivalent to
- (A) Photon
- (B) Positron
- (C) Muon
- (D) Quark
6. The chemical symbol of Sodium is
- (A) S
- (B) So
- (C) Na
- (D) K
7. N2 content is kept constant in the biosphere due to
- (A) N2 fixation
- (B) Industrial
pollution
- (C) Nitrogen
cycle
- (D) Absorption
of N2
8. Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?
- (A) By
cyanobacteria
- (B) By
electrical discharges in the atmosphere
- (C) By
industrially synthesised fertilizer
- (D) By
denitrification
9. Which of the following gases is used for ripening the fruits?
- (A) Methane
- (B) Ethane
- (C) Ethylene
- (D) Acetylene
10. Besides hydrogen, which of the following elements is common in organic compounds?
- (A) Phosphorus
- (B) Sulphur
- (C) Nitrogen
- (D) Carbon
11. The hottest part of the gas flame is known as
- (A) Luminous
zone
- (B) Dark zone
- (C) Blue zone
- (D) Non-luminous
zone
12. The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?
- (A) 1/6
- (B) 1/3
- (C) 1/8
- (D) 1/4
13. The maximum number of covalent formed by nitrogen is
- (A) 1
- (B) 2
- (C) 3
- (D) 4
14. The metal that is usually extracted from sea water is
- (A) Ca
- (B) Na
- (C) K
- (D) Mg
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