I- Ph - CH 3 i- CrO 2 Cl 2- ii- H - - H 2 OII- P h - CCl 3 KOH excessIII- Ph - CH 2 OH PCC -IV - Ph - C O - Cl H 2- Pd - BaSO 4V - Ph - C - N i- SnCl 2 - HCl - ii- H - - H 2 OV I - Ph - H CO - HCl - anhyd- AlCl 3V II - Ph - H CH 3 Cl - anhyd- AlCl 3 H - KMnO 4-Consider following reactions and give the number of reactions which prooduce benzaldehyde as final major product-

I. Etard's Reaction Ph CH_3 Ph CHO II. Ph CCl_3 Ph COOK III. Ph CH_2OH Ph CHO IV. Rosenmund reaction Ph O||C Cl Ph CHO V. Stephen's reaction Ph C ≡ N Ph CH ...

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Byju's Answer

Standard XII

Chemistry

Hell-Volhard-Zelinski Reaction

I. Ph - CH 3 ...

Question

$I . P h - C H_{3} i . C r O_{2} C l_{2} - ------ \to i i . H^{+} / H_{2} O$

$I I . P h - C C l_{3} K O H - -- \to excess$

$I I I . P h - C H_{2} O H P C C - -- \to$

$I V . P h - O | | C - C l H_{2} - ------ \to P d - B a S O_{4}$

$V . P h - C \equiv N i . S n C l_{2} / H C l - ------- \to i i . H^{+} / H_{2} O$

$V I . P h - H C O / H C l - ------- \to anhyd. A l C l_{3}$

$V I I . P h - H C H_{3} C l - ------- \to anhyd. A l C l_{3} H^{+}, K M n O_{4} - ------ \to Δ$

Consider following reactions and give the number of reactions which prooduce benzaldehyde as final major product.

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Solution

$I .$ Etard's Reaction
$P h - C H_{3} i . C r O_{2} C l_{2} - ------ \to i i . H^{+} / H_{2} O P h - C H O$

$I I . P h - C C l_{3} K O H - -- \to excess P h - C O O K$

$I I I . P h - C H_{2} O H P C C - -- \to P h - C H O$

$I V .$ Rosenmund reaction
$P h - O | | C - C l H_{2} - ------ \to P d - B a S O_{4} P h - C H O$

$V .$ Stephen's reaction
$P h - C \equiv N i . S n C l_{2} / H C l - ------- \to i i . H^{+} / H_{2} O P h - C H O$

$V I .$ Gattermann Koch reaction
$P h - H C O / H C l - ------- \to anhyd. A l C l_{3} P h - C H O$

$V I I .$ Friedel-Crafts alkylation followed by oxidation
$P h - H C H_{3} C l - ------- \to anhyd. A l C l_{3} P h - C H_{3} H^{+}, K M n O_{4} - ------ \to Δ P h - C O O H$

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Similar questions

P h - O | | C - C H_{3} N a N O_{2} \to H C l (A) A C_{2} O \to h e a t (B) H_{3} O^{+} \to (C)

. Product (C) of the given reaction is:

Q. Consider following reactions and write total number of reactions which can produce

1^{\circ}

alcohol as one of the product.

1) E t - C O O H i . B H_{3} - ------ \to i i . H^{+} / H_{2} O

2) (C H_{3})_{2} C H - C O O H N a B H_{4} - --- \to

3) E t - C O O C H_{3} H^{+} / H_{2} O - ---- \to

4) (C H_{3})_{2} C = C H_{2} i . B H_{3}, T H F - -------- \to i i . H_{2} O_{2}, O H^{-}

5) E t - C O C l H_{2} - ------ \to P d - B a S O_{4}

6) (C H_{3})_{2} C H - O - E t H^{+} / H_{2} O - ---- \to

N a_{2} C_{2} H C l - - \to (excess) N a N H_{2} - --------- \to (excess) C H_{3} I H_{2} - ------ \to P d - B a S O_{4} i . O_{3} - ------ \to i i . Z n - H_{2} O

Final product can be obtained by:

P h - C \equiv C - C H_{3} H g^{2 +} / H^{+} - ----- \to ?

The major product of the above reaction is :

A mixture of benzaldehyde and aniline gives different reaction under different pH conditions. Identify the incorrect statement:

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