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(a) Write the reagent used in the follow...

(a) Write the reagent used in the following :
`C_(6)H_(5)COCH_(3)overset(?)rarr C_(6)H_(5)CH_(12)CH_(3)`
(b) Arrange the following compounds in increasing order of reactivity towards nucleophilic addition.
`CH_(3)CHO, C_(6)H_(5)CHO, HCHO`

Text Solution

Verified by Experts

(a) `Zn//Hg` and `HCl`. The reaction is known as Clemmense reduction.
(b) The correct order is : `C_(6)H_(5)CHO lt CH_(3)CHO lt HCHO`
For explanation, consult section 8.
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DINESH PUBLICATION-ALDEHYDES AND KETONES -Question From Board
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  2. Write the structures of A,B C and D in the following reactions : C(6...

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  3. (a) Write the reagent used in the following : C(6)H(5)COCH(3)overset...

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  4. Predict the product of the folllowing reaction : CH(3)-underset(CH(...

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  5. How can aromatic aldehydes and ketones be prepared by the following re...

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  6. Explain the structure of carbonyl group.

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  7. Write the structures of A, B, C and D in the following reactions :

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  8. Write the product of the following reaction. CH(3)CH(2)CH=CHCH(2)CNo...

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  9. A and B are functional isomers of compound C(3)H(6)O. On heating with ...

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  10. Draw the structure of semicarbozide of ethanal.

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  11. Why are alpha-hydrogen atom of aldehydes and ketones acidic in nature?

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  12. Oxidation of aldehydes is easier than that of ketones. Explain.

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  13. Write the products of the following reactions : (i) (ii) CH(3)-C...

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  14. Give simple chemical tests to distinguish between Butanal and butan-2-...

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  15. Write the reactions involved in the following : (i) Etard reaction ,...

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  16. Give the mechanism of cyanohydrin formation when carbonyl compounds re...

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  17. Write the IUPAC name of the following compound CH(3)-underset(OCH(2))u...

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  18. Write the structure of the main products of the following reactions :

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  19. Write the structures of the cross-aldol products between ethanal and p...

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  20. Identify the reactiona nd write the IUPAC name of the product formed.

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