Which of the following acid is utilised in the photography?
A. Formic acid
B. Oxalic acid
C. Citric acid
D. Acetic acid
Answer: Option B
A. Formic acid
B. Oxalic acid
C. Citric acid
D. Acetic 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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