28114
\({{C_6}{H_5}CHO + HCN \to }\) $\begin{matrix} \,\,\,\, H \\ \,\,\,\, |\\ {{C}_{6}}{{H}_{5}}-C-CN \\ \,\,\,\, | \\ \,\,\,\,\,\,OH \\ \end{matrix}$ The product would be
1 A racemate
2 Optically active
3 A meso compound
4 A mixture of diastereomers
Explanation:
\({{C}_{6}}{{H}_{5}}CHO+HCN\to \)$\begin{matrix} \,\,\,\, H \\ \,\,\,\, |\\ {{C}_{6}}{{H}_{5}}-C-CN \\ \,\,\,\, | \\ \,\,\,\,\,\,OH \\ \end{matrix}$ is optically active.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28115
What happens when \(2-\) hydroxy benzoic acid is distilled with zinc dust, it gives
1 Phenol
2 Benzoic acid
3 Benzaldehyde
4 A polymeric compound
Explanation:
zinc causes the reduction of \(2-\)hydroxybenzoic acid to give benzoic acid.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28116
\(C{H_3}C{O_2}{C_2}{H_5}\) on reaction with sodium ethoxide in ethanol gives \(A\), which on heating in the presence of acid gives \(B\) compound \(B\) is
1 \(C{H_3}COC{H_2}COOH\)
2 \(C{H_3}COC{H_3}\)
3
4
Explanation:
(c) Claisen condensatio
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28117
\({C_6}{H_5}CONHC{H_3}\) can be converted into \({C_6}{H_5}C{H_2}NHC{H_3}\) by
1 \(NaB{H_4}\)
2 \({H_2} - Pd/C\)
3 \(LiAl{H_4}\)
4 \(Zn - Hg/HCl\)
Explanation:
\({C_6}{H_5}CONHC{H_3} \,\mathop {\xrightarrow{{Zn - Hg/}}}\limits_{HCl} \,{C_6}{H_5}C{H_2}NHC{H_3}\) This reaction is known as Clemmenson reduction.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28118
Among the following acids which has the lowest \(pKa\) value
1 \(C{H_3}COOH\)
2 \(HCOOH\)
3 \({(C{H_3})_2}CH - COOH\)
4 \(C{H_3}C{H_2}COOH\)
Explanation:
(b)\({K_a} \propto \frac{1}{{p{K_a}}}\); The value of \({K_a}\) is highest for \(HCOOH\).
28114
\({{C_6}{H_5}CHO + HCN \to }\) $\begin{matrix} \,\,\,\, H \\ \,\,\,\, |\\ {{C}_{6}}{{H}_{5}}-C-CN \\ \,\,\,\, | \\ \,\,\,\,\,\,OH \\ \end{matrix}$ The product would be
1 A racemate
2 Optically active
3 A meso compound
4 A mixture of diastereomers
Explanation:
\({{C}_{6}}{{H}_{5}}CHO+HCN\to \)$\begin{matrix} \,\,\,\, H \\ \,\,\,\, |\\ {{C}_{6}}{{H}_{5}}-C-CN \\ \,\,\,\, | \\ \,\,\,\,\,\,OH \\ \end{matrix}$ is optically active.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28115
What happens when \(2-\) hydroxy benzoic acid is distilled with zinc dust, it gives
1 Phenol
2 Benzoic acid
3 Benzaldehyde
4 A polymeric compound
Explanation:
zinc causes the reduction of \(2-\)hydroxybenzoic acid to give benzoic acid.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28116
\(C{H_3}C{O_2}{C_2}{H_5}\) on reaction with sodium ethoxide in ethanol gives \(A\), which on heating in the presence of acid gives \(B\) compound \(B\) is
1 \(C{H_3}COC{H_2}COOH\)
2 \(C{H_3}COC{H_3}\)
3
4
Explanation:
(c) Claisen condensatio
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28117
\({C_6}{H_5}CONHC{H_3}\) can be converted into \({C_6}{H_5}C{H_2}NHC{H_3}\) by
1 \(NaB{H_4}\)
2 \({H_2} - Pd/C\)
3 \(LiAl{H_4}\)
4 \(Zn - Hg/HCl\)
Explanation:
\({C_6}{H_5}CONHC{H_3} \,\mathop {\xrightarrow{{Zn - Hg/}}}\limits_{HCl} \,{C_6}{H_5}C{H_2}NHC{H_3}\) This reaction is known as Clemmenson reduction.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28118
Among the following acids which has the lowest \(pKa\) value
1 \(C{H_3}COOH\)
2 \(HCOOH\)
3 \({(C{H_3})_2}CH - COOH\)
4 \(C{H_3}C{H_2}COOH\)
Explanation:
(b)\({K_a} \propto \frac{1}{{p{K_a}}}\); The value of \({K_a}\) is highest for \(HCOOH\).
28114
\({{C_6}{H_5}CHO + HCN \to }\) $\begin{matrix} \,\,\,\, H \\ \,\,\,\, |\\ {{C}_{6}}{{H}_{5}}-C-CN \\ \,\,\,\, | \\ \,\,\,\,\,\,OH \\ \end{matrix}$ The product would be
1 A racemate
2 Optically active
3 A meso compound
4 A mixture of diastereomers
Explanation:
\({{C}_{6}}{{H}_{5}}CHO+HCN\to \)$\begin{matrix} \,\,\,\, H \\ \,\,\,\, |\\ {{C}_{6}}{{H}_{5}}-C-CN \\ \,\,\,\, | \\ \,\,\,\,\,\,OH \\ \end{matrix}$ is optically active.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28115
What happens when \(2-\) hydroxy benzoic acid is distilled with zinc dust, it gives
1 Phenol
2 Benzoic acid
3 Benzaldehyde
4 A polymeric compound
Explanation:
zinc causes the reduction of \(2-\)hydroxybenzoic acid to give benzoic acid.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28116
\(C{H_3}C{O_2}{C_2}{H_5}\) on reaction with sodium ethoxide in ethanol gives \(A\), which on heating in the presence of acid gives \(B\) compound \(B\) is
1 \(C{H_3}COC{H_2}COOH\)
2 \(C{H_3}COC{H_3}\)
3
4
Explanation:
(c) Claisen condensatio
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28117
\({C_6}{H_5}CONHC{H_3}\) can be converted into \({C_6}{H_5}C{H_2}NHC{H_3}\) by
1 \(NaB{H_4}\)
2 \({H_2} - Pd/C\)
3 \(LiAl{H_4}\)
4 \(Zn - Hg/HCl\)
Explanation:
\({C_6}{H_5}CONHC{H_3} \,\mathop {\xrightarrow{{Zn - Hg/}}}\limits_{HCl} \,{C_6}{H_5}C{H_2}NHC{H_3}\) This reaction is known as Clemmenson reduction.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28118
Among the following acids which has the lowest \(pKa\) value
1 \(C{H_3}COOH\)
2 \(HCOOH\)
3 \({(C{H_3})_2}CH - COOH\)
4 \(C{H_3}C{H_2}COOH\)
Explanation:
(b)\({K_a} \propto \frac{1}{{p{K_a}}}\); The value of \({K_a}\) is highest for \(HCOOH\).
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ALDEHYDES, KETONES AND CARBOXYLIC ACID
28114
\({{C_6}{H_5}CHO + HCN \to }\) $\begin{matrix} \,\,\,\, H \\ \,\,\,\, |\\ {{C}_{6}}{{H}_{5}}-C-CN \\ \,\,\,\, | \\ \,\,\,\,\,\,OH \\ \end{matrix}$ The product would be
1 A racemate
2 Optically active
3 A meso compound
4 A mixture of diastereomers
Explanation:
\({{C}_{6}}{{H}_{5}}CHO+HCN\to \)$\begin{matrix} \,\,\,\, H \\ \,\,\,\, |\\ {{C}_{6}}{{H}_{5}}-C-CN \\ \,\,\,\, | \\ \,\,\,\,\,\,OH \\ \end{matrix}$ is optically active.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28115
What happens when \(2-\) hydroxy benzoic acid is distilled with zinc dust, it gives
1 Phenol
2 Benzoic acid
3 Benzaldehyde
4 A polymeric compound
Explanation:
zinc causes the reduction of \(2-\)hydroxybenzoic acid to give benzoic acid.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28116
\(C{H_3}C{O_2}{C_2}{H_5}\) on reaction with sodium ethoxide in ethanol gives \(A\), which on heating in the presence of acid gives \(B\) compound \(B\) is
1 \(C{H_3}COC{H_2}COOH\)
2 \(C{H_3}COC{H_3}\)
3
4
Explanation:
(c) Claisen condensatio
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28117
\({C_6}{H_5}CONHC{H_3}\) can be converted into \({C_6}{H_5}C{H_2}NHC{H_3}\) by
1 \(NaB{H_4}\)
2 \({H_2} - Pd/C\)
3 \(LiAl{H_4}\)
4 \(Zn - Hg/HCl\)
Explanation:
\({C_6}{H_5}CONHC{H_3} \,\mathop {\xrightarrow{{Zn - Hg/}}}\limits_{HCl} \,{C_6}{H_5}C{H_2}NHC{H_3}\) This reaction is known as Clemmenson reduction.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28118
Among the following acids which has the lowest \(pKa\) value
1 \(C{H_3}COOH\)
2 \(HCOOH\)
3 \({(C{H_3})_2}CH - COOH\)
4 \(C{H_3}C{H_2}COOH\)
Explanation:
(b)\({K_a} \propto \frac{1}{{p{K_a}}}\); The value of \({K_a}\) is highest for \(HCOOH\).
28114
\({{C_6}{H_5}CHO + HCN \to }\) $\begin{matrix} \,\,\,\, H \\ \,\,\,\, |\\ {{C}_{6}}{{H}_{5}}-C-CN \\ \,\,\,\, | \\ \,\,\,\,\,\,OH \\ \end{matrix}$ The product would be
1 A racemate
2 Optically active
3 A meso compound
4 A mixture of diastereomers
Explanation:
\({{C}_{6}}{{H}_{5}}CHO+HCN\to \)$\begin{matrix} \,\,\,\, H \\ \,\,\,\, |\\ {{C}_{6}}{{H}_{5}}-C-CN \\ \,\,\,\, | \\ \,\,\,\,\,\,OH \\ \end{matrix}$ is optically active.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28115
What happens when \(2-\) hydroxy benzoic acid is distilled with zinc dust, it gives
1 Phenol
2 Benzoic acid
3 Benzaldehyde
4 A polymeric compound
Explanation:
zinc causes the reduction of \(2-\)hydroxybenzoic acid to give benzoic acid.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28116
\(C{H_3}C{O_2}{C_2}{H_5}\) on reaction with sodium ethoxide in ethanol gives \(A\), which on heating in the presence of acid gives \(B\) compound \(B\) is
1 \(C{H_3}COC{H_2}COOH\)
2 \(C{H_3}COC{H_3}\)
3
4
Explanation:
(c) Claisen condensatio
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28117
\({C_6}{H_5}CONHC{H_3}\) can be converted into \({C_6}{H_5}C{H_2}NHC{H_3}\) by
1 \(NaB{H_4}\)
2 \({H_2} - Pd/C\)
3 \(LiAl{H_4}\)
4 \(Zn - Hg/HCl\)
Explanation:
\({C_6}{H_5}CONHC{H_3} \,\mathop {\xrightarrow{{Zn - Hg/}}}\limits_{HCl} \,{C_6}{H_5}C{H_2}NHC{H_3}\) This reaction is known as Clemmenson reduction.
ALDEHYDES, KETONES AND CARBOXYLIC ACID
28118
Among the following acids which has the lowest \(pKa\) value
1 \(C{H_3}COOH\)
2 \(HCOOH\)
3 \({(C{H_3})_2}CH - COOH\)
4 \(C{H_3}C{H_2}COOH\)
Explanation:
(b)\({K_a} \propto \frac{1}{{p{K_a}}}\); The value of \({K_a}\) is highest for \(HCOOH\).
