Formalin is an aqueous solution of:
Correct answer: B. Formaldehyde
- A. Acetic acid
- B. Formaldehyde
- C. Formic acid
- D. Acetone
Explanation
Formalin is the common name for a saturated aqueous solution of formaldehyde, typically containing 37-40% formaldehyde by mass. It is widely used as a preservative and disinfectant.
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About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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