Which of the following acids is in sour milk?
A. glycolic acid
B. lactic acid
C. citric acid
D. tartaric acid
Answer: Option B
A. glycolic acid
B. lactic acid
C. citric acid
D. tartaric acid
Answer: Option B
Traditional 'battery' contains which of the following chemicals?
A. Ethylene glycol
B. Sulphuric acid
C. Sodium bicarbonate
D. Ethanol
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