Number of cross-condensation products in the | vedclass

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Question

(C) In the Claisen condensation of two different esters,both having $\alpha$-hydrogens,a total of $4$ products are formed: $2$ self-condensation produ

Vedclass · Accepted Answer

$2$

Vedclass · Answer

(C) In the Claisen condensation of two different esters,both having $\alpha$-hydrogens,a total of $4$ products are formed: $2$ self-condensation products and $2$ cross-condensation products.The cross-condensation products are formed as follows:$1.$ The enolate of $CH_3COOC_2H_5$ attacks the carbonyl carbon of $C_6H_5CH_2COOC_2H_5$.$2.$ The enolate of $C_6H_5CH_2COOC_2H_5$ attacks the carbonyl carbon of $CH_3COOC_2H_5$.Therefore,the total number of cross-condensation products is $2$.

Column-$1$ (Acid)	Column-$2$ ($pK_a$ value)
$A. CH_3COOH$	$I. 0.23$
$B. F_3CCOOH$	$II. 3.41$
$C. \text{Benzoic acid}$	$III. 4.19$
$D. p\text{-Nitrobenzoic acid}$	$IV. 4.76$

Number of cross-condensation products in the given reaction: $CH_3COOC_2H_5 + C_6H_5CH_2COOC_2H_5 \xrightarrow[C_2H_5OH]{C_2H_5ONa}$

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The $pK_a$ values of four carboxylic acids are given below. Identify the weakest carboxylic acid.

Arrange the following in decreasing order of their acidic strength and give reason for your answer: $CH_{3}CH_{2}OH$,$CH_{3}COOH$,$ClCH_{2}COOH$,$FCH_{2}COOH$,$C_{6}H_{5}CH_{2}COOH$.

What is the correct order of acidity for the given compounds?

Match the following:
Column-$1$ (Acid) Column-$2$ ($pK_a$ value)
$A. CH_3COOH$ $I. 0.23$
$B. F_3CCOOH$ $II. 3.41$
$C. \text{Benzoic acid}$ $III. 4.19$
$D. p\text{-Nitrobenzoic acid}$ $IV. 4.76$

The correct match is:

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