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Q.

Benzaldehyde can be prepared by oxidation of toluene with

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a

Acidic KMnO4

b

K2Cr2O7/H+

c

CrO2Cl2/CS2/H+

d

All

answer is C.

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Detailed Solution

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The oxidation of toluene (C6​H5​CH3​ with chromyl chloride (CRO2​Cl2​) in CCl4​ or CS2​ to give benzaldehyde is called Etard reaction. In this reaction, the chromyl chloride first forms a brown complex, which is Separated and then decomposed with H2​O to give benzaldehyde (C6​H5​CHO)

Benzaldehyde can be prepared by:
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