Which reagent from the following is used for the preparation of aliphatic aldehyde from nitriles?

  • A
    $CrO_2Cl_2$ in $CS_2$
  • B
    $CrO_3$ in acetic anhydride
  • C
    $SnCl_2, HCl$
  • D
    $Co, HCl$,anhydrous $AlCl_3$

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Which of the following reactions does not give benzaldehyde as a product?

Difficult
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Match the following:
| List-$I$ | List-$II$ |
| :--- | :--- |
| $(A)$ Acid chloride to aldehyde | $(I)$ $DIBAL-H$ |
| $(B)$ Benzene to benzaldehyde | $(II)$ $CO, HCl, \text{anhyd. } AlCl_3$ |
| $(C)$ Acetylene to aldehyde | $(III)$ $HgSO_4, H_2SO_4$ |
| $(D)$ Ester to aldehyde | $(IV)$ $H_2, Pd-BaSO_4$ |

Which of the following reactions does not give benzaldehyde as a product?

Difficult
View Solution

The conversion,$PhCN \to PhCOCH_3$,can be achieved most conveniently by reaction with

Write a note on the preparation of primary alcohol from aldehyde by reduction reaction.

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