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General Knowledge - General Science

Exercise : General Science - Elements and Metals
16.
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
Argon
Xenon
Helium
Krypton
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
The gases used in different types of welding would include
oxygen and hydrogen
oxygen, hydrogen, acetylene and nitrogen
oxygen, acetylene and argon
oxygen and acetylene
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
The property of a substance to absorb moisture from the air on exposure is called
osmosis
deliquescence
efflorescence
desiccation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
In which of the following activities silicon carbide is used?
Making cement and glass
Disinfecting water of ponds
cutting very hard substances
Making casts for statues
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The average salinity of sea water is
3%
3.5%
2.5%
2%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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