90883
The reagent $X$ used for the following reaction is
1 $\mathrm{Ni}$
2 $\mathrm{Pd} / \mathrm{C}$
3 $\mathrm{LiAlH}_{4}$
4 $\mathrm{Na} /$ Liquid $\mathrm{NH}_{3}$
Explanation:
$\mathrm{As}$, in the given reaction $\mathrm{C} \equiv \mathrm{C}$ triple bond are changing into $\mathrm{C}-\mathrm{C}$ single bond and hydrogen is added. Thus, the given reaction is an example of reduction, which is carried out by $\mathrm{H}_{2}$ in presence of $\mathrm{Pd} / \mathrm{C}$ catalyst.
**[Karnataka CET-2018]**
HALOALKANES AND HALOARENES
90887
The major product of the following reaction is:
1
2
3
4
Explanation:
In williamson's synthesis, due to steric hindrance secondary halides prefer to undergo elimination reaction and as Saytzeff's rule a more stable alkene is formed.
**[AIIMS-27 May
HALOALKANES AND HALOARENES
90899
The major product obtained in the following reaction is :
$\beta$ elimination reaction occurs when an alkyl halide is treated with a bulkier base.
**[JEE Main 2017]**
HALOALKANES AND HALOARENES
90889
Reactivity order for $\mathrm{S}_{\mathrm{N}} 1$
1 I $>$ II $>$ III $>$ IV
2 II $>$ I $>$ III $>$ IV
3 III $>$ II $>$ I $>$ IV
4 IV $>$ III $>$ II $>$ I
Explanation:
Rate of $\mathrm{S}_{\mathrm{N}} 1 \propto$ Stability of carbocation. (i) (ii) (iii) (iv) Hence, correct order is $\text { II }>\text { I }>\text { III }>\text { IV }$
90883
The reagent $X$ used for the following reaction is
1 $\mathrm{Ni}$
2 $\mathrm{Pd} / \mathrm{C}$
3 $\mathrm{LiAlH}_{4}$
4 $\mathrm{Na} /$ Liquid $\mathrm{NH}_{3}$
Explanation:
$\mathrm{As}$, in the given reaction $\mathrm{C} \equiv \mathrm{C}$ triple bond are changing into $\mathrm{C}-\mathrm{C}$ single bond and hydrogen is added. Thus, the given reaction is an example of reduction, which is carried out by $\mathrm{H}_{2}$ in presence of $\mathrm{Pd} / \mathrm{C}$ catalyst.
**[Karnataka CET-2018]**
HALOALKANES AND HALOARENES
90887
The major product of the following reaction is:
1
2
3
4
Explanation:
In williamson's synthesis, due to steric hindrance secondary halides prefer to undergo elimination reaction and as Saytzeff's rule a more stable alkene is formed.
**[AIIMS-27 May
HALOALKANES AND HALOARENES
90899
The major product obtained in the following reaction is :
$\beta$ elimination reaction occurs when an alkyl halide is treated with a bulkier base.
**[JEE Main 2017]**
HALOALKANES AND HALOARENES
90889
Reactivity order for $\mathrm{S}_{\mathrm{N}} 1$
1 I $>$ II $>$ III $>$ IV
2 II $>$ I $>$ III $>$ IV
3 III $>$ II $>$ I $>$ IV
4 IV $>$ III $>$ II $>$ I
Explanation:
Rate of $\mathrm{S}_{\mathrm{N}} 1 \propto$ Stability of carbocation. (i) (ii) (iii) (iv) Hence, correct order is $\text { II }>\text { I }>\text { III }>\text { IV }$
90883
The reagent $X$ used for the following reaction is
1 $\mathrm{Ni}$
2 $\mathrm{Pd} / \mathrm{C}$
3 $\mathrm{LiAlH}_{4}$
4 $\mathrm{Na} /$ Liquid $\mathrm{NH}_{3}$
Explanation:
$\mathrm{As}$, in the given reaction $\mathrm{C} \equiv \mathrm{C}$ triple bond are changing into $\mathrm{C}-\mathrm{C}$ single bond and hydrogen is added. Thus, the given reaction is an example of reduction, which is carried out by $\mathrm{H}_{2}$ in presence of $\mathrm{Pd} / \mathrm{C}$ catalyst.
**[Karnataka CET-2018]**
HALOALKANES AND HALOARENES
90887
The major product of the following reaction is:
1
2
3
4
Explanation:
In williamson's synthesis, due to steric hindrance secondary halides prefer to undergo elimination reaction and as Saytzeff's rule a more stable alkene is formed.
**[AIIMS-27 May
HALOALKANES AND HALOARENES
90899
The major product obtained in the following reaction is :
$\beta$ elimination reaction occurs when an alkyl halide is treated with a bulkier base.
**[JEE Main 2017]**
HALOALKANES AND HALOARENES
90889
Reactivity order for $\mathrm{S}_{\mathrm{N}} 1$
1 I $>$ II $>$ III $>$ IV
2 II $>$ I $>$ III $>$ IV
3 III $>$ II $>$ I $>$ IV
4 IV $>$ III $>$ II $>$ I
Explanation:
Rate of $\mathrm{S}_{\mathrm{N}} 1 \propto$ Stability of carbocation. (i) (ii) (iii) (iv) Hence, correct order is $\text { II }>\text { I }>\text { III }>\text { IV }$
90883
The reagent $X$ used for the following reaction is
1 $\mathrm{Ni}$
2 $\mathrm{Pd} / \mathrm{C}$
3 $\mathrm{LiAlH}_{4}$
4 $\mathrm{Na} /$ Liquid $\mathrm{NH}_{3}$
Explanation:
$\mathrm{As}$, in the given reaction $\mathrm{C} \equiv \mathrm{C}$ triple bond are changing into $\mathrm{C}-\mathrm{C}$ single bond and hydrogen is added. Thus, the given reaction is an example of reduction, which is carried out by $\mathrm{H}_{2}$ in presence of $\mathrm{Pd} / \mathrm{C}$ catalyst.
**[Karnataka CET-2018]**
HALOALKANES AND HALOARENES
90887
The major product of the following reaction is:
1
2
3
4
Explanation:
In williamson's synthesis, due to steric hindrance secondary halides prefer to undergo elimination reaction and as Saytzeff's rule a more stable alkene is formed.
**[AIIMS-27 May
HALOALKANES AND HALOARENES
90899
The major product obtained in the following reaction is :
$\beta$ elimination reaction occurs when an alkyl halide is treated with a bulkier base.
**[JEE Main 2017]**
HALOALKANES AND HALOARENES
90889
Reactivity order for $\mathrm{S}_{\mathrm{N}} 1$
1 I $>$ II $>$ III $>$ IV
2 II $>$ I $>$ III $>$ IV
3 III $>$ II $>$ I $>$ IV
4 IV $>$ III $>$ II $>$ I
Explanation:
Rate of $\mathrm{S}_{\mathrm{N}} 1 \propto$ Stability of carbocation. (i) (ii) (iii) (iv) Hence, correct order is $\text { II }>\text { I }>\text { III }>\text { IV }$
