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Aldehydes, Ketones and Carboxylic Acids

Short Answer Type

71. Write the structure of compounds A and B:

bold space bold space bold space bold left parenthesis bold italic C bold italic H subscript bold 3 bold right parenthesis subscript bold 2 bold C bold space bold equals bold space bold O bold space bold rightwards arrow with bold space bold space bold space bold H bold C bold N bold space bold space bold space bold space on top bold space bold A bold space bold space bold space bold rightwards arrow with bold space bold space bold space bold space bold H subscript bold 3 bold O to the power of bold plus bold space bold space bold space on top bold B

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72.

Give the product of the reaction of acetaldehyde with sodium hydrogen sulphite.

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73.

Complete the following:

$bold italic C bold italic H subscript bold italic 3 bold italic C bold italic H bold italic O bold italic space bold italic rightwards arrow with bold italic N bold italic H subscript bold italic 2 bold italic C bold italic O bold italic N bold italic H bold italic N bold italic H subscript bold italic 2 on top$

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74.

Complete the following:

$bold left parenthesis bold italic C bold italic H subscript bold 3 bold right parenthesis subscript bold 2 bold italic C bold italic O bold space bold rightwards arrow with bold N bold H subscript bold 2 bold N bold H subscript bold 2 on top$

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75. What happens when ethanal reacts with excess of methanol in the presence of trace amount of HCl?

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76.
Explain Clemmensen’s reduction.

The Clemmensen Reduction allows the deoxygenation of aldehydes or ketones, to produce the corresponding hydrocarbon. We reduce the carbonyl group to hydrocarbon by using zinc amalgam in concentrated HCl.