Chemistry Mcqs for the preparation of NTS, PPSC, SPSC, BPSC, KPSC, FPSC, OTS and other academic entry test and jobs tests.
16. Which of the following Chemicals is used for fruit ripening
(a) Calcium carbide
(b) Sodium chloride
(c) Potassium chloride
(d) None of the above
17. In the entire universe, what is the most abundant element
(a) Hydrogen
(b) Iron
(c) Lead
(d) Oxygen
18. The single acid which dissolves gold is
(a) Nitric acid
(b) Selenic acid
(c) Hydrochloric acid
(d) Aqua regia
19. The chemical name of quartz is
(a) Calcium oxide
(b) Calcium phosphate
(c) Sodium phosphate
(d) Sodium silicate
20. Marsh gas mainly contains
(a) C2H2
(b) CO
(c) CH4
(d) H2S
21. What is the silk
(a) Fat
(b) Carbohydrate
(c) Hydrocarbon
(d) Protein
22. German Silver is an alloy of
(a) copper:55,nickel:25 and zinc: 20
(b) copper:25 nickel:45 and zinc: 30
(c) copper:25,nickel:55 and zinc: 20
(d) copper:15,nicke1:45 and zinc: 40
23. Which of the following is not a compound of calcium
(a) Gypsum
(b) Marble
(c) Chalk
(d) Silicon
24. Which one of the following is used as a moderator in a nuclear reactor
(a) Radium
(b) Ordinary water
(c) Thorium
(d) Heavy water
25. Alloys in which mercury is one of the metals are called
(a) Amalgams
(b) Emulsions
(c) Mixtures
(d) Solders
26. Diamond is the __________ form of carbon
(a) crystalline
(b) amorphous
(c) chemical
(d) alkaline
27. The atomic weight of uranium is
(a) 234
(b) 238
(c) 226
(d) 242
28. Which of the following is used as laughing gas
(a) Nitrogen trioxide
(b) Nitrogen dioxide
(c) Nitrous oxide
(d) Nitrogen tetroxide
29. Carbon occurs in nature in the purest form as
(a) Diamond
(b) Graphite
(c) Carbon black
(d) Coal
30. Which substance was the first organic chemical to be synthesized from an inorganic source
(a) Urea
(b) Hellenic acid
(c) Hydrochloric acid
(d) Aqua regia
