What reagents are required for making the following changes in functional groups? (a) ` -CHOto -CH_(2)`OH (b) `-CN to-COOH` (c) `-COOHto H` (d) `-CONH_(2) to -NH_(2)`

What reagents are required for making the following changes in functio

1.	What reagents are required for making the following changes in functional groups? (a) ` -CHOto -CH_(2)`OH (b) `-CN to-COOH` (c) `-COOHto H` (d) `-CONH_(2) to -NH_(2)`
Answer» (a) `LiAIH_(4)`, (b) dil. HCI, (c) Soda lime, (d) `Br_(2)` and KOH

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An organic compound [A] is `C_(5)H_(8)O_(3).`On heating with soda lime, it gives [B]. The compound [B] reacts with HCN to give another compound [C] which reacts with thionyl chloride to produce [D]. When the compound [A] is heated with potassium dichromate the product is acetic acid and malonic acid. The structure of compound [A] is :A. `CH_(3)-CH_(2)-overset(O)overset(||)C-CH_(2)COOH`B. `CH_(3)CH_(2)underset(OH)underset(|)CHCH_(2)COOH`C. `CH_(3)overset(O)overset(||)C"C"H_(2)CH_(2)COOH`D. `CH_(3)CH_(2)underset(OH)underset(|)CHCOOH`
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What reagents are required for making the following changes in functional groups? (a) ` -CHOto -CH_(2)`OH (b) `-CN to-COOH` (c) `-COOHto H` (d) `-CONH_(2) to -NH_(2)`

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