Hemiacetal is formed when formaldehyde adds one molecule of ______?

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Hemiacetal is formed when formaldehyde adds one molecule of ______? Answer: Ethyl alcohol

A hemiacetal is produced when an aldehyde (formaldehyde) reacts with an alcohol like ethyl alcohol. The resulting compound has both a hydroxyl (-OH) and an alkoxy (-OCH₂CH₃) group attached to the same carbon. This reaction is important in sugar chemistry and organic synthesis.

Question context

This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.