Metals and Elements GK Questions – Part 4
31. In which of the following activities silicon carbide is useD.
A. Making cement and glass
B. Disinfecting water of ponD.
C. cutting very hard substances
D. Making casts for statues
Answer:
C. cutting very hard substances
32. The average salinity of sea water is
A. 3%
B. 3.5%
C. 2.5%
D. 2%
Answer:
B. 3.5%
33. Which of the following was to be discovered first in the chromospheres of the sun?
A. Krypton
B. Xenon
C. Neon
D. Helium
Answer:
D. Helium
34. Which of the following is in liquid form at room temperature?
A. Lithium
B. Sodium
C. Francium
D. Cerium
Answer:
C. Francium
35. The filament of an electric bulb is made of
A. tungsten
B. nichrome
C. graphite
D. iron
Answer:
A. tungsten
36. Diamond is an allotropic form of
A. germanium
B. carbon
C. silicon
D. sulphur
Answer:
B. carbon
37. Bell metal is an alloy of
A. nickel and copper
B. zinc and copper
C. brass and nickel
D. tin and copper
Answer:
D. tin and copper
38. The main constituents of pearls are
A. calcium oxide and ammonium chloriD.
B. calcium carbonate and magnesium carbonate
C. aragonite and conchiolin
D. ammonium sulphate and sodium carbonate
Answer:
B. calcium carbonate and magnesium carbonate
39. Amalgams are
A. highly coloured alloys
B. alloys which contain mercury as one of the contents
C. alloys which have great resistance to abrasion
D. alloys which contain carbon
Answer:
B. alloys which contain mercury as one of the contents
40. Which of the following is the lightest metal?
A. Mercury
B. Lithium
C. Lead
D. Silver
Answer:
B. Lithium
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Metals and Elements
- Metals and Elements GK Questions and Answers
- Metals and Elements GK Questions – Part 2
- Metals and Elements GK Questions – Part 3
- Metals and Elements GK Questions – Part 4
- Metals and Elements GK Questions – Part 5
- Metals and Elements GK Questions – Part 6
- Metals and Elements GK Questions – Part 7
- Metals and Elements GK Questions – Part 8
- Metals and Elements GK Questions – Part 9
- Metals and Elements GK Questions – Part 10
- Metals and Elements GK Questions – Part 11
- Metals and Elements GK Questions – Part 12
- Metals and Elements GK Questions – Part 13
- Metals and Elements GK Questions – Part 14
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