01. Alkenes
Hydrocarbons

230327 Consider the following reactions,
\(\begin{aligned} & \mathrm{C}_2 \mathrm{H}_2 \xrightarrow[500^{\circ} \mathrm{C}]{\text { red hot iron tube }} \mathrm{A} \\ & \mathrm{A} \xrightarrow[70^{\circ} \mathrm{C}]{\text { conc. } \mathrm{HNO}_3, \text { conc. } \mathrm{H}_2 \mathrm{SO}_4} \mathrm{~B} \\ & \mathrm{~B} \xrightarrow{\mathrm{LiAAHH}_4} \mathrm{C}_6 \mathrm{H}_5-\mathrm{N}=\mathrm{N}-\mathrm{C}_6 \mathrm{~N}_5\end{aligned}\)
$A$ and $B$ are

1 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_4, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_6$
2 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_6, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
3 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_4, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
4 $\mathrm{A}=\mathrm{C}_6 \mathrm{H}_6, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NO}_2$
Hydrocarbons

230329 The order of stability among the following alkenes is:
original image

1 (i) $>$ (iv) $>$ (ii) $>$ (iii)
2 (ii) $>$ (i) $>$ (iii) $>$ (iv)
3 (i) $>$ (ii) $>$ (iv) $>$ (iii)
4 (iii) $>$ (iv) $>$ (ii) $>$ (i)
Hydrocarbons

230343 What is $\mathrm{A}$ in following reaction?
original image

1 original image
2 original image
3 original image
4 original image
Hydrocarbons

230333 \(\mathrm{CH}_3-\mathbf{C N} \xrightarrow{\text { dil. } \mathrm{HCl}} \mathrm{A} \xrightarrow{\mathrm{LiAlH}_4} \mathrm{~B} \xrightarrow{\mathrm{PCl}_5} \mathrm{C} \xrightarrow{\mathrm{alk KOH}} \mathrm{D}\)
The product ' $D$ ' in the above sequence of reaction is

1 acetaldehyde
2 ethene
3 ethyne
4 acetyl chloride.
Hydrocarbons

230334 Identify the main product in the reaction
\(\mathrm{C}\left(\mathrm{CH}_3\right)_3 \mathrm{OH} \xrightarrow[358 \mathrm{~K}]{20 \% \mathrm{H}_3 \mathrm{PO}_4}\) ?

1 $\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{CH}_2$
2 $\left(\mathrm{CH}_3\right)_2 \mathrm{CHOH}$
3 $\mathrm{CH}_3 \mathrm{CH}=\mathrm{CHCH}_3$
4 $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CH}_2$
Hydrocarbons

230327 Consider the following reactions,
\(\begin{aligned} & \mathrm{C}_2 \mathrm{H}_2 \xrightarrow[500^{\circ} \mathrm{C}]{\text { red hot iron tube }} \mathrm{A} \\ & \mathrm{A} \xrightarrow[70^{\circ} \mathrm{C}]{\text { conc. } \mathrm{HNO}_3, \text { conc. } \mathrm{H}_2 \mathrm{SO}_4} \mathrm{~B} \\ & \mathrm{~B} \xrightarrow{\mathrm{LiAAHH}_4} \mathrm{C}_6 \mathrm{H}_5-\mathrm{N}=\mathrm{N}-\mathrm{C}_6 \mathrm{~N}_5\end{aligned}\)
$A$ and $B$ are

1 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_4, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_6$
2 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_6, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
3 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_4, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
4 $\mathrm{A}=\mathrm{C}_6 \mathrm{H}_6, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NO}_2$
Hydrocarbons

230329 The order of stability among the following alkenes is:
original image

1 (i) $>$ (iv) $>$ (ii) $>$ (iii)
2 (ii) $>$ (i) $>$ (iii) $>$ (iv)
3 (i) $>$ (ii) $>$ (iv) $>$ (iii)
4 (iii) $>$ (iv) $>$ (ii) $>$ (i)
Hydrocarbons

230343 What is $\mathrm{A}$ in following reaction?
original image

1 original image
2 original image
3 original image
4 original image
Hydrocarbons

230333 \(\mathrm{CH}_3-\mathbf{C N} \xrightarrow{\text { dil. } \mathrm{HCl}} \mathrm{A} \xrightarrow{\mathrm{LiAlH}_4} \mathrm{~B} \xrightarrow{\mathrm{PCl}_5} \mathrm{C} \xrightarrow{\mathrm{alk KOH}} \mathrm{D}\)
The product ' $D$ ' in the above sequence of reaction is

1 acetaldehyde
2 ethene
3 ethyne
4 acetyl chloride.
Hydrocarbons

230334 Identify the main product in the reaction
\(\mathrm{C}\left(\mathrm{CH}_3\right)_3 \mathrm{OH} \xrightarrow[358 \mathrm{~K}]{20 \% \mathrm{H}_3 \mathrm{PO}_4}\) ?

1 $\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{CH}_2$
2 $\left(\mathrm{CH}_3\right)_2 \mathrm{CHOH}$
3 $\mathrm{CH}_3 \mathrm{CH}=\mathrm{CHCH}_3$
4 $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CH}_2$
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Hydrocarbons

230327 Consider the following reactions,
\(\begin{aligned} & \mathrm{C}_2 \mathrm{H}_2 \xrightarrow[500^{\circ} \mathrm{C}]{\text { red hot iron tube }} \mathrm{A} \\ & \mathrm{A} \xrightarrow[70^{\circ} \mathrm{C}]{\text { conc. } \mathrm{HNO}_3, \text { conc. } \mathrm{H}_2 \mathrm{SO}_4} \mathrm{~B} \\ & \mathrm{~B} \xrightarrow{\mathrm{LiAAHH}_4} \mathrm{C}_6 \mathrm{H}_5-\mathrm{N}=\mathrm{N}-\mathrm{C}_6 \mathrm{~N}_5\end{aligned}\)
$A$ and $B$ are

1 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_4, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_6$
2 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_6, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
3 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_4, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
4 $\mathrm{A}=\mathrm{C}_6 \mathrm{H}_6, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NO}_2$
Hydrocarbons

230329 The order of stability among the following alkenes is:
original image

1 (i) $>$ (iv) $>$ (ii) $>$ (iii)
2 (ii) $>$ (i) $>$ (iii) $>$ (iv)
3 (i) $>$ (ii) $>$ (iv) $>$ (iii)
4 (iii) $>$ (iv) $>$ (ii) $>$ (i)
Hydrocarbons

230343 What is $\mathrm{A}$ in following reaction?
original image

1 original image
2 original image
3 original image
4 original image
Hydrocarbons

230333 \(\mathrm{CH}_3-\mathbf{C N} \xrightarrow{\text { dil. } \mathrm{HCl}} \mathrm{A} \xrightarrow{\mathrm{LiAlH}_4} \mathrm{~B} \xrightarrow{\mathrm{PCl}_5} \mathrm{C} \xrightarrow{\mathrm{alk KOH}} \mathrm{D}\)
The product ' $D$ ' in the above sequence of reaction is

1 acetaldehyde
2 ethene
3 ethyne
4 acetyl chloride.
Hydrocarbons

230334 Identify the main product in the reaction
\(\mathrm{C}\left(\mathrm{CH}_3\right)_3 \mathrm{OH} \xrightarrow[358 \mathrm{~K}]{20 \% \mathrm{H}_3 \mathrm{PO}_4}\) ?

1 $\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{CH}_2$
2 $\left(\mathrm{CH}_3\right)_2 \mathrm{CHOH}$
3 $\mathrm{CH}_3 \mathrm{CH}=\mathrm{CHCH}_3$
4 $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CH}_2$
Hydrocarbons

230327 Consider the following reactions,
\(\begin{aligned} & \mathrm{C}_2 \mathrm{H}_2 \xrightarrow[500^{\circ} \mathrm{C}]{\text { red hot iron tube }} \mathrm{A} \\ & \mathrm{A} \xrightarrow[70^{\circ} \mathrm{C}]{\text { conc. } \mathrm{HNO}_3, \text { conc. } \mathrm{H}_2 \mathrm{SO}_4} \mathrm{~B} \\ & \mathrm{~B} \xrightarrow{\mathrm{LiAAHH}_4} \mathrm{C}_6 \mathrm{H}_5-\mathrm{N}=\mathrm{N}-\mathrm{C}_6 \mathrm{~N}_5\end{aligned}\)
$A$ and $B$ are

1 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_4, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_6$
2 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_6, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
3 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_4, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
4 $\mathrm{A}=\mathrm{C}_6 \mathrm{H}_6, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NO}_2$
Hydrocarbons

230329 The order of stability among the following alkenes is:
original image

1 (i) $>$ (iv) $>$ (ii) $>$ (iii)
2 (ii) $>$ (i) $>$ (iii) $>$ (iv)
3 (i) $>$ (ii) $>$ (iv) $>$ (iii)
4 (iii) $>$ (iv) $>$ (ii) $>$ (i)
Hydrocarbons

230343 What is $\mathrm{A}$ in following reaction?
original image

1 original image
2 original image
3 original image
4 original image
Hydrocarbons

230333 \(\mathrm{CH}_3-\mathbf{C N} \xrightarrow{\text { dil. } \mathrm{HCl}} \mathrm{A} \xrightarrow{\mathrm{LiAlH}_4} \mathrm{~B} \xrightarrow{\mathrm{PCl}_5} \mathrm{C} \xrightarrow{\mathrm{alk KOH}} \mathrm{D}\)
The product ' $D$ ' in the above sequence of reaction is

1 acetaldehyde
2 ethene
3 ethyne
4 acetyl chloride.
Hydrocarbons

230334 Identify the main product in the reaction
\(\mathrm{C}\left(\mathrm{CH}_3\right)_3 \mathrm{OH} \xrightarrow[358 \mathrm{~K}]{20 \% \mathrm{H}_3 \mathrm{PO}_4}\) ?

1 $\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{CH}_2$
2 $\left(\mathrm{CH}_3\right)_2 \mathrm{CHOH}$
3 $\mathrm{CH}_3 \mathrm{CH}=\mathrm{CHCH}_3$
4 $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CH}_2$
Hydrocarbons

230327 Consider the following reactions,
\(\begin{aligned} & \mathrm{C}_2 \mathrm{H}_2 \xrightarrow[500^{\circ} \mathrm{C}]{\text { red hot iron tube }} \mathrm{A} \\ & \mathrm{A} \xrightarrow[70^{\circ} \mathrm{C}]{\text { conc. } \mathrm{HNO}_3, \text { conc. } \mathrm{H}_2 \mathrm{SO}_4} \mathrm{~B} \\ & \mathrm{~B} \xrightarrow{\mathrm{LiAAHH}_4} \mathrm{C}_6 \mathrm{H}_5-\mathrm{N}=\mathrm{N}-\mathrm{C}_6 \mathrm{~N}_5\end{aligned}\)
$A$ and $B$ are

1 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_4, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_6$
2 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_6, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
3 $\mathrm{A}=\mathrm{C}_2 \mathrm{H}_4, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
4 $\mathrm{A}=\mathrm{C}_6 \mathrm{H}_6, \mathrm{~B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NO}_2$
Hydrocarbons

230329 The order of stability among the following alkenes is:
original image

1 (i) $>$ (iv) $>$ (ii) $>$ (iii)
2 (ii) $>$ (i) $>$ (iii) $>$ (iv)
3 (i) $>$ (ii) $>$ (iv) $>$ (iii)
4 (iii) $>$ (iv) $>$ (ii) $>$ (i)
Hydrocarbons

230343 What is $\mathrm{A}$ in following reaction?
original image

1 original image
2 original image
3 original image
4 original image
Hydrocarbons

230333 \(\mathrm{CH}_3-\mathbf{C N} \xrightarrow{\text { dil. } \mathrm{HCl}} \mathrm{A} \xrightarrow{\mathrm{LiAlH}_4} \mathrm{~B} \xrightarrow{\mathrm{PCl}_5} \mathrm{C} \xrightarrow{\mathrm{alk KOH}} \mathrm{D}\)
The product ' $D$ ' in the above sequence of reaction is

1 acetaldehyde
2 ethene
3 ethyne
4 acetyl chloride.
Hydrocarbons

230334 Identify the main product in the reaction
\(\mathrm{C}\left(\mathrm{CH}_3\right)_3 \mathrm{OH} \xrightarrow[358 \mathrm{~K}]{20 \% \mathrm{H}_3 \mathrm{PO}_4}\) ?

1 $\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{CH}_2$
2 $\left(\mathrm{CH}_3\right)_2 \mathrm{CHOH}$
3 $\mathrm{CH}_3 \mathrm{CH}=\mathrm{CHCH}_3$
4 $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CH}_2$