What is the chemical symbol of acetylene gas?
A. CH2
B. CH3
C. C3H2
D. C2H2
Answer: Option D
A. CH2
B. CH3
C. C3H2
D. C2H2
Answer: Option D
Traditional 'battery' contains which of the following chemicals?
A. Ethylene glycol
B. Sulphuric acid
C. Sodium bicarbonate
D. Ethanol
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