Each member of the hydrocarbon family differs from the previous member by a group of . . . . . . . .
A. Methylene
B. Methyl
C. Ethyl
D. Ethylene
Answer: Option A
A. Methylene
B. Methyl
C. Ethyl
D. Ethylene
Answer: Option A
Traditional 'battery' contains which of the following chemicals?
A. Ethylene glycol
B. Sulphuric acid
C. Sodium bicarbonate
D. Ethanol
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