How many hydrogen atoms are present in a molecule of ethanol?
A. four
B. five
C. six
D. seven
Answer: Option C
A. four
B. five
C. six
D. seven
Answer: Option C
Traditional 'battery' contains which of the following chemicals?
A. Ethylene glycol
B. Sulphuric acid
C. Sodium bicarbonate
D. Ethanol
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