General Knowledge - General Science

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Exercise : General Science - Elements and Metals
1.
Brass gets discoloured in air because of the presence of which of the following gases in air?
Oxygen
Hydrogen sulphide
Carbon dioxide
Nitrogen
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
Which of the following is a non metal that remains liquid at room temperature?
Phosphorous
Bromine
Chlorine
Helium
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
Chlorophyll is a naturally occurring chelate compound in which central metal is
copper
magnesium
iron
calcium
Answer: Option
Explanation:
No answer description is available. Let's discuss.

4.
Which of the following is used in pencils?
Graphite
Silicon
Charcoal
Phosphorous
Answer: Option
Explanation:
No answer description is available. Let's discuss.

5.
Which of the following metals forms an amalgam with other metals?
Tin
Mercury
Lead
Zinc
Answer: Option
Explanation:
No answer description is available. Let's discuss.