Answer:
D. period is reciprocal of frequency.
Explanation:
That is true because the warm air goes up and the cold air comes down
In Fisher esterification, sulfuric acid is used as a catalyst and its function is to convert the carboxylic compound in its conjugate acid. This favours the nucleophilic attack of the alcohol. To act as a catalyst you need a strong acid, therefore sulphuric acid is suitable for this kind of reaction.
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