Chemistry MCQ’s Quiz Questions for NTS, PPSC, CSS, FPSC, PMS, OTS, PTS Tests and Interviews. MCQs are taken from Caravan Comprehensive book. These Multiple Choice Questions of Chemistry are posted here for preparation of Job tests and Entry tests like MCAT and ECAT etc.
1. Which of the following gases is used in me extinguishers?
(a) Oxygen
(b) Hydrogen
(c) Water vapor
(d) Carbon dioxide
2. Stains of rust from iron on cloth can be removed by ______?
(a) Hydrogen peroxide
(b) Alcohol
(c) Oxalic acid
(d) Petrol
3. Cooking gas is a mixture of which of the following two gases?
(a) Methane and Carbon dioxide
(b) Oxygen and Nitrogen
(c) Bautane and Propane
(d) Oxygen and Methane
4. Nameplates made of brass get discolored in air because of the presence of which of the following gases in the air?
(a) Oxygen
(b) Nitrogen
(c) Carbon dioxide
(d) Hydrogen sulphide
5. On addition of salt to water, its______?
(a) Boiling point increases
(b) Boiling point decreases
(c) Boiling point is not affected
(d) Freezing point increases
6. Which of the following gases does not pollute air?
(a) Carbon dioxide
(b) Carbon monoxide
(c) Nitrogen dioxide
(d) Sulphur dioxide
7. The inorganic natural resource of the earth is_______?
(a) Mineral fuels
(b) Wood
(c) Coal
(d) Microbes
8. Which one of the following has the highest fuel value?
(a) Hydrogen
(b) Charcoal
(c) Naturaigas
(d) Gasoline
9. The characteristic odour of garlic is due to _______?
(a) A chloro compound
(b) A sulphur compound
(c) A fluorine compound
(d) Acetic acid
10. Which of the following group of compounds constitute carbohydrates?
(a) Fats and sugar
(b) Fats, sugar and proteins
(c) Starch, sugar and proteins
(d) Starch and sugar
11. What is the chemical name of Baking Soda?
(a) Sodium bicarbonate
(b) Sodium Nitrate
(c) Sodium Carbonate
(d) Potassium
12. Milk lacks in one important nutrient, which?
(a) Calcium
(b) Iron
(c) Potassium
(d) Protein
13. Ripening of fruits is hastened by which of the following gases?
(a) Hydrogen
(b) Carbon dioxide
(c) Methane
(d) Ethylene
14. Iron articles rust because of the formation of _______?
(a) ferrous chloride
(b) a mixture of ferrous and ferric hydroxide
(c) sodium carbonate
(d) ferric chloride
15. Gunpowder consists of _______?
(a) 75% potassium nitrite + 15% charcoal + 10% Sulphur
(b) 75% potassium nitrite + 10% charcoal + 15% Sulphur
(c) 75% potassium nitrate + 10% charcoal + 15% Sulphur
(d) 75% potassium nitrate + 15% charcoal + 10% Sulphur
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