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5 cards from this section. Quick, good the night before a test.
What is formalin? Give one use.
It is a solution of the simplest aldehyde.
Name the aldehyde used as an almond flavouring and give its formula.
It is the simplest aromatic aldehyde.
Formalin is:
It is a solution of the simplest aldehyde.
Which plastic is made by condensing phenol with methanal?
It was used for old electrical switches.
X is the simplest aldehyde, a pungent gas whose 40% solution in water preserves specimens. X reacts with ammonia to give a crystalline compound Y used as a urinary antiseptic, and with phenol to give a hard plastic Z. Identify X, Y and Z, and write the equation for the formation of Y.
The simplest aldehyde has only one carbon atom.
Benzaldehyde is used as a food flavouring, but methanal is never added to food, although both are aldehydes. Suggest reasons.
Compare their smells, their toxicity and the amounts that would be used.
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