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General Knowledge - General Science

Exercise : General Science - Elements and Metals
46.
In fireworks, the green flame is produced because of
sodium
barium
mercury
potassium
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Permanent hardness of water can be removed by adding
chlorine
washing soda
potassium permanganate
bleaching powder
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
Marsh gas is
nitrogen
ethane
methane
hydrogen
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
LPG consists of mainly
methane, ethane and hexane
ethane, hexane and nonane
methane, hexane and nonane
methane, butane and propane
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
Air is a/an
compound
element
electrolyte
mixture
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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