Chemistry Gk Questions and Answers - ObjectiveBooks

Chemistry Gk Questions and Answers

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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