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CHXI13:HYDROCARBONS

318182 \({\mathrm{\mathrm{CH} \equiv \mathrm{CH} \xrightarrow[\mathrm{NaOH}]{\mathrm{O}_{3}}(\mathrm{X}) \xrightarrow[\mathrm{CH}_{3} \mathrm{COOH}]{\mathrm{Zn}}}}\)
In the given reaction ethyne reacts with ozone in the presence of alkali forming X which further reacts with zinc in the presence of acetic acid forming Y . The ratio of molecular mass of X and Y is ____ .

1 5.2

2 0.5

3 2

4 0.96

Explanation:

supporting img
\[\begin{array}{l}
\begin{array}{*{20}{l}}
\begin{array}{l}
{\rm{X}} = {\rm{Glyoxal}}{\mkern 1mu} {\rm{with}}{\mkern 1mu} {\rm{mol}}.\,{\rm{mas}}\\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 24 + 32 + 2
\end{array}\\
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} = {\rm{58}}{\mkern 1mu} \,{\rm{g}}\,{\mkern 1mu} {\rm{mo}}{{\rm{l}}^{ - 1}}}
\end{array}\\
\begin{array}{*{20}{l}}
\begin{array}{l}
{\rm{Y}} = {\rm{Ethanediol}}\,{\mkern 1mu} {\rm{with}}{\mkern 1mu}\, {\rm{mol}}.\,{\rm{mas}}\\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 24 + 32 + 6
\end{array}\\
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} = {\rm{62}}{\mkern 1mu} \,{\rm{g}}\,{\mkern 1mu} {\rm{mo}}{{\rm{l}}^{ - 1}}}
\end{array}\\
{\rm{Ratio}} = \frac{{58}}{{62}} = 0.94
\end{array}\]

CHXI13:HYDROCARBONS

318183 1-butyne on oxidation with hot alkaline \(\mathrm{KMnO}_{4}\) would yield which of the following as end product?

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COOH}\)

2 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}\)

3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}\)

4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}+\mathrm{HCOOH}\)

AIIMS - 2017

CHXI13:HYDROCARBONS

318184 An unsaturated linear hydrocarbon ' A ' has the molecular formula \(\mathrm{C}_{4} \mathrm{H}_{6}\). One mole of 'A ' reacts with 2 moles of \(\mathrm{Br}_{2}\). ' A ' gives white ppt. with ammoniacal silver nitrate solution. Compound 'A ' is

1 1-butyne

2 2-butyne

3 1-butene

4 iso-butylene.

CHXI13:HYDROCARBONS

318185 Oxidation product of acetylene with chromic acid is

1 Acetic acid

2 Oxalic acid

3 Acetone

4 Acetylene dicarboxylic acid

CHXI13:HYDROCARBONS

318186 Propyne on ozonolysis in the presence of \({{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}\) is
(1) Ethanoic acid
(2) Methanoic acid
(3) Propanoic acid
(4) None
The correct answer is -

1 1, 2

2 2, 3

3 3, 4

4 1, 3

CHXI13:HYDROCARBONS

318182 \({\mathrm{\mathrm{CH} \equiv \mathrm{CH} \xrightarrow[\mathrm{NaOH}]{\mathrm{O}_{3}}(\mathrm{X}) \xrightarrow[\mathrm{CH}_{3} \mathrm{COOH}]{\mathrm{Zn}}}}\)
In the given reaction ethyne reacts with ozone in the presence of alkali forming X which further reacts with zinc in the presence of acetic acid forming Y . The ratio of molecular mass of X and Y is ____ .

1 5.2

2 0.5

3 2

4 0.96

Explanation:

supporting img
\[\begin{array}{l}
\begin{array}{*{20}{l}}
\begin{array}{l}
{\rm{X}} = {\rm{Glyoxal}}{\mkern 1mu} {\rm{with}}{\mkern 1mu} {\rm{mol}}.\,{\rm{mas}}\\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 24 + 32 + 2
\end{array}\\
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} = {\rm{58}}{\mkern 1mu} \,{\rm{g}}\,{\mkern 1mu} {\rm{mo}}{{\rm{l}}^{ - 1}}}
\end{array}\\
\begin{array}{*{20}{l}}
\begin{array}{l}
{\rm{Y}} = {\rm{Ethanediol}}\,{\mkern 1mu} {\rm{with}}{\mkern 1mu}\, {\rm{mol}}.\,{\rm{mas}}\\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 24 + 32 + 6
\end{array}\\
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} = {\rm{62}}{\mkern 1mu} \,{\rm{g}}\,{\mkern 1mu} {\rm{mo}}{{\rm{l}}^{ - 1}}}
\end{array}\\
{\rm{Ratio}} = \frac{{58}}{{62}} = 0.94
\end{array}\]

CHXI13:HYDROCARBONS

318183 1-butyne on oxidation with hot alkaline \(\mathrm{KMnO}_{4}\) would yield which of the following as end product?

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COOH}\)

2 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}\)

3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}\)

4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}+\mathrm{HCOOH}\)

AIIMS - 2017

CHXI13:HYDROCARBONS

318184 An unsaturated linear hydrocarbon ' A ' has the molecular formula \(\mathrm{C}_{4} \mathrm{H}_{6}\). One mole of 'A ' reacts with 2 moles of \(\mathrm{Br}_{2}\). ' A ' gives white ppt. with ammoniacal silver nitrate solution. Compound 'A ' is

1 1-butyne

2 2-butyne

3 1-butene

4 iso-butylene.

CHXI13:HYDROCARBONS

318185 Oxidation product of acetylene with chromic acid is

1 Acetic acid

2 Oxalic acid

3 Acetone

4 Acetylene dicarboxylic acid

CHXI13:HYDROCARBONS

318186 Propyne on ozonolysis in the presence of \({{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}\) is
(1) Ethanoic acid
(2) Methanoic acid
(3) Propanoic acid
(4) None
The correct answer is -

1 1, 2

2 2, 3

3 3, 4

4 1, 3

CHXI13:HYDROCARBONS

318182 \({\mathrm{\mathrm{CH} \equiv \mathrm{CH} \xrightarrow[\mathrm{NaOH}]{\mathrm{O}_{3}}(\mathrm{X}) \xrightarrow[\mathrm{CH}_{3} \mathrm{COOH}]{\mathrm{Zn}}}}\)
In the given reaction ethyne reacts with ozone in the presence of alkali forming X which further reacts with zinc in the presence of acetic acid forming Y . The ratio of molecular mass of X and Y is ____ .

1 5.2

2 0.5

3 2

4 0.96

Explanation:

supporting img
\[\begin{array}{l}
\begin{array}{*{20}{l}}
\begin{array}{l}
{\rm{X}} = {\rm{Glyoxal}}{\mkern 1mu} {\rm{with}}{\mkern 1mu} {\rm{mol}}.\,{\rm{mas}}\\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 24 + 32 + 2
\end{array}\\
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} = {\rm{58}}{\mkern 1mu} \,{\rm{g}}\,{\mkern 1mu} {\rm{mo}}{{\rm{l}}^{ - 1}}}
\end{array}\\
\begin{array}{*{20}{l}}
\begin{array}{l}
{\rm{Y}} = {\rm{Ethanediol}}\,{\mkern 1mu} {\rm{with}}{\mkern 1mu}\, {\rm{mol}}.\,{\rm{mas}}\\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 24 + 32 + 6
\end{array}\\
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} = {\rm{62}}{\mkern 1mu} \,{\rm{g}}\,{\mkern 1mu} {\rm{mo}}{{\rm{l}}^{ - 1}}}
\end{array}\\
{\rm{Ratio}} = \frac{{58}}{{62}} = 0.94
\end{array}\]

CHXI13:HYDROCARBONS

318183 1-butyne on oxidation with hot alkaline \(\mathrm{KMnO}_{4}\) would yield which of the following as end product?

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COOH}\)

2 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}\)

3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}\)

4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}+\mathrm{HCOOH}\)

AIIMS - 2017

CHXI13:HYDROCARBONS

318184 An unsaturated linear hydrocarbon ' A ' has the molecular formula \(\mathrm{C}_{4} \mathrm{H}_{6}\). One mole of 'A ' reacts with 2 moles of \(\mathrm{Br}_{2}\). ' A ' gives white ppt. with ammoniacal silver nitrate solution. Compound 'A ' is

1 1-butyne

2 2-butyne

3 1-butene

4 iso-butylene.

CHXI13:HYDROCARBONS

318185 Oxidation product of acetylene with chromic acid is

1 Acetic acid

2 Oxalic acid

3 Acetone

4 Acetylene dicarboxylic acid

CHXI13:HYDROCARBONS

318186 Propyne on ozonolysis in the presence of \({{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}\) is
(1) Ethanoic acid
(2) Methanoic acid
(3) Propanoic acid
(4) None
The correct answer is -

1 1, 2

2 2, 3

3 3, 4

4 1, 3

CHXI13:HYDROCARBONS

318182 \({\mathrm{\mathrm{CH} \equiv \mathrm{CH} \xrightarrow[\mathrm{NaOH}]{\mathrm{O}_{3}}(\mathrm{X}) \xrightarrow[\mathrm{CH}_{3} \mathrm{COOH}]{\mathrm{Zn}}}}\)
In the given reaction ethyne reacts with ozone in the presence of alkali forming X which further reacts with zinc in the presence of acetic acid forming Y . The ratio of molecular mass of X and Y is ____ .

1 5.2

2 0.5

3 2

4 0.96

Explanation:

supporting img
\[\begin{array}{l}
\begin{array}{*{20}{l}}
\begin{array}{l}
{\rm{X}} = {\rm{Glyoxal}}{\mkern 1mu} {\rm{with}}{\mkern 1mu} {\rm{mol}}.\,{\rm{mas}}\\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 24 + 32 + 2
\end{array}\\
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} = {\rm{58}}{\mkern 1mu} \,{\rm{g}}\,{\mkern 1mu} {\rm{mo}}{{\rm{l}}^{ - 1}}}
\end{array}\\
\begin{array}{*{20}{l}}
\begin{array}{l}
{\rm{Y}} = {\rm{Ethanediol}}\,{\mkern 1mu} {\rm{with}}{\mkern 1mu}\, {\rm{mol}}.\,{\rm{mas}}\\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 24 + 32 + 6
\end{array}\\
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} = {\rm{62}}{\mkern 1mu} \,{\rm{g}}\,{\mkern 1mu} {\rm{mo}}{{\rm{l}}^{ - 1}}}
\end{array}\\
{\rm{Ratio}} = \frac{{58}}{{62}} = 0.94
\end{array}\]

CHXI13:HYDROCARBONS

318183 1-butyne on oxidation with hot alkaline \(\mathrm{KMnO}_{4}\) would yield which of the following as end product?

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COOH}\)

2 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}\)

3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}\)

4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}+\mathrm{HCOOH}\)

AIIMS - 2017

CHXI13:HYDROCARBONS

318184 An unsaturated linear hydrocarbon ' A ' has the molecular formula \(\mathrm{C}_{4} \mathrm{H}_{6}\). One mole of 'A ' reacts with 2 moles of \(\mathrm{Br}_{2}\). ' A ' gives white ppt. with ammoniacal silver nitrate solution. Compound 'A ' is

1 1-butyne

2 2-butyne

3 1-butene

4 iso-butylene.

CHXI13:HYDROCARBONS

318185 Oxidation product of acetylene with chromic acid is

1 Acetic acid

2 Oxalic acid

3 Acetone

4 Acetylene dicarboxylic acid

CHXI13:HYDROCARBONS

318186 Propyne on ozonolysis in the presence of \({{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}\) is
(1) Ethanoic acid
(2) Methanoic acid
(3) Propanoic acid
(4) None
The correct answer is -

1 1, 2

2 2, 3

3 3, 4

4 1, 3

CHXI13:HYDROCARBONS

318182 \({\mathrm{\mathrm{CH} \equiv \mathrm{CH} \xrightarrow[\mathrm{NaOH}]{\mathrm{O}_{3}}(\mathrm{X}) \xrightarrow[\mathrm{CH}_{3} \mathrm{COOH}]{\mathrm{Zn}}}}\)
In the given reaction ethyne reacts with ozone in the presence of alkali forming X which further reacts with zinc in the presence of acetic acid forming Y . The ratio of molecular mass of X and Y is ____ .

1 5.2

2 0.5

3 2

4 0.96

Explanation:

supporting img
\[\begin{array}{l}
\begin{array}{*{20}{l}}
\begin{array}{l}
{\rm{X}} = {\rm{Glyoxal}}{\mkern 1mu} {\rm{with}}{\mkern 1mu} {\rm{mol}}.\,{\rm{mas}}\\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 24 + 32 + 2
\end{array}\\
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} = {\rm{58}}{\mkern 1mu} \,{\rm{g}}\,{\mkern 1mu} {\rm{mo}}{{\rm{l}}^{ - 1}}}
\end{array}\\
\begin{array}{*{20}{l}}
\begin{array}{l}
{\rm{Y}} = {\rm{Ethanediol}}\,{\mkern 1mu} {\rm{with}}{\mkern 1mu}\, {\rm{mol}}.\,{\rm{mas}}\\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 24 + 32 + 6
\end{array}\\
{{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} = {\rm{62}}{\mkern 1mu} \,{\rm{g}}\,{\mkern 1mu} {\rm{mo}}{{\rm{l}}^{ - 1}}}
\end{array}\\
{\rm{Ratio}} = \frac{{58}}{{62}} = 0.94
\end{array}\]

CHXI13:HYDROCARBONS

318183 1-butyne on oxidation with hot alkaline \(\mathrm{KMnO}_{4}\) would yield which of the following as end product?

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COOH}\)

2 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}\)

3 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}\)

4 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}+\mathrm{HCOOH}\)

AIIMS - 2017

CHXI13:HYDROCARBONS

318184 An unsaturated linear hydrocarbon ' A ' has the molecular formula \(\mathrm{C}_{4} \mathrm{H}_{6}\). One mole of 'A ' reacts with 2 moles of \(\mathrm{Br}_{2}\). ' A ' gives white ppt. with ammoniacal silver nitrate solution. Compound 'A ' is

1 1-butyne

2 2-butyne

3 1-butene

4 iso-butylene.

CHXI13:HYDROCARBONS

318185 Oxidation product of acetylene with chromic acid is

1 Acetic acid

2 Oxalic acid

3 Acetone

4 Acetylene dicarboxylic acid

CHXI13:HYDROCARBONS

318186 Propyne on ozonolysis in the presence of \({{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}\) is
(1) Ethanoic acid
(2) Methanoic acid
(3) Propanoic acid
(4) None
The correct answer is -

1 1, 2

2 2, 3

3 3, 4

4 1, 3

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