Chemistry MCQ’s Quiz Questions for Competitive Exams with Answers VOL 8

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. Permanent hardness of water can be removed by adding_______?

(a) Potassium permanganate
(b) Chlorine
(c) Bleaching powder
(d) Washing soda

2. The first synthetic fiber made by man was____?

(a) Rayon
(b) Nylon
(c) Polyester
(d) Terrycott

3. Gypsum is added to cement clinker to______?

(a) Increase the tensile strength of cement
(b) Bind the particles of calcium silicate
(c) Decrease the rate of setting of cement
(d) Facilitate the formation of colloidal gel

4. Production of chlorofluorocarbons (CFC) gas is used in which of the following domestic products?

(a) Television
(b) Tube-light
(c) Cooking gas
(d) Refrigerator

5. In fireworks, the green flame is produced because of __________?

(a) Mercury
(b) Sodium
(c) Potassium
(d) Barium

6. Mixture of two metals is called_______?

(a) Dispersion
(b) Alloy
(c) Mouse
(d) Hard Drive

7. Dynamite was discovered by______?

(a) Daimler
(b) Mosely
(c) Alfred Nobel
(d) Freud

8. What is the chemical combination of laughing gas?

(a) Helium and Nitrogen
(b) Nitrogen and Hydrogen
(c) Nitrogen and Oxygen
(d) Hydrogen and Oxygen

9. Which of the following is the highest element of the periodic table?

(a) Nitrogen
(b) Carbon dioxide
(c) Hydrogen
(d) Oxygen

10. Mixing of which material makes rubber more flexible?

(a) Graphite
(b) Marble powder
(c) Sulphur
(d) Potassium permanganate

11. Which is the smallest unit of protein?

(a) Fatty acid
(b) Glycerol
(c) Amino Acid
(d) Calcium

12. When heavy and unstable elements split into relatively smaller elements with the release of energy the process is called ______?

(a) Fission
(b) Fusion
(c) Diffusion
(d) Infusion

13. Name the acid which is common to all acids?

(a) Oxalic
(b) Hydrogen
(c) Carbolic
(d) Sulphuric

14. What is laughing gas called?

(a) Ferrous chloride
(b) Sulphur dioxide
(c) Ferric hydroxide
(d) Nitrous Oxide