General Science - General Knowledge Questions and Answers: "1.
Brass gets discoloured in air because of the presence of which of the following gases in air?
A. Oxygen
B. Hydrogen sulphide
C. Carbon dioxide
D. Nitrogen
Answer: Option B
Answer: Option B
Brass gets discoloured in air because of the presence of which of the following gases in air?
A. Oxygen
B. Hydrogen sulphide
C. Carbon dioxide
D. Nitrogen
Answer: Option B
| 2. | Which of the following is a non metal that remains liquid at room temperature? | |||||||
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