322482
The conversion of ethyl bromide using sodium iodide and dry acetone, this reaction is known as
1 Swarts reaction
2 Finkelstein reaction
3 Sandmeyer reaction
4 Stephen reaction
Explanation:
Alkyl iodides and fluorides are prepared by the \(\mathrm{S}_{\mathrm{N}} 2\) mechanism. Alkyl chlorides or bromides reacts with \(\mathrm{Nal}\) in dry acetone to gives alkyl iodine. This reaction is known as Finkelstein reaction. \(\begin{aligned}& \mathrm{R}-\mathrm{X}+\mathrm{Nal} \longrightarrow \mathrm{R} 1+\mathrm{NaX}[\mathrm{X}=\mathrm{Cl}, \mathrm{Br}] \\& \text { e.g. } \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Br}+\mathrm{Nal} \longrightarrow \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{l}+\mathrm{NaBr}\end{aligned}\)
MHTCET - 2017
CHXII10:HALOALKANES AND HALOARENES
322483
Assertion : Alkyl iodide can be prepared by treating alkyl chloride/bromide with \(\mathrm{NaI}\) in acetone. Reason : \(\mathrm{NaCl} / \mathrm{NaBr}\) are soluble in acetone while \(\mathrm{NaI}\) is not.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
This is Finkelstein reaction which involves the conversion of an alkyl chloride/bromide to an alkyl iodide by the addition of sodium iodide in acetone. Because sodium iodide is soluble in acetone and \(\mathrm{NaCl}\) and \(\mathrm{NaBr}\) are not, the equilibrium is shifted by the precipitation of insoluble salt. So option (3) is correct.
CHXII10:HALOALKANES AND HALOARENES
322484
Assertion : Alkyl iodides darken on standing. Reason : Alkyl iodides are prepared by Finkelstein reaction.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Less stable iodides tend to lose two iodine atoms. These liberated iodine atoms (2 I) are then absorbed by other iodides, causing a darkening in their color. Alkyl iodides are indeed prepared by Finkelstein reaction. But it is not the correct explanation for the assertion. So option (2) is correct.
CHXII10:HALOALKANES AND HALOARENES
322485
Which reaction is useful in exchange of halogen in alkyl chloride by iodide?
1 Wurtz reaction
2 Finkelstein reaction
3 Reimer-Tiemann reaction
4 Williamson synthesis
Explanation:
The reaction is useful in exchange of halogen in alkyl chloride by iodide is Finkelstein reaction. This reaction is used in preparation of alkyl iodide by the reaction of alkyl chloride, bromide with \(\mathrm{Nal}\) in dry acetone. e.g. \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{Br + Nal}}\) \(\xrightarrow[\Delta ]{{{\text{Acetone}}}}\) \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{l + NaBr}}\)
322482
The conversion of ethyl bromide using sodium iodide and dry acetone, this reaction is known as
1 Swarts reaction
2 Finkelstein reaction
3 Sandmeyer reaction
4 Stephen reaction
Explanation:
Alkyl iodides and fluorides are prepared by the \(\mathrm{S}_{\mathrm{N}} 2\) mechanism. Alkyl chlorides or bromides reacts with \(\mathrm{Nal}\) in dry acetone to gives alkyl iodine. This reaction is known as Finkelstein reaction. \(\begin{aligned}& \mathrm{R}-\mathrm{X}+\mathrm{Nal} \longrightarrow \mathrm{R} 1+\mathrm{NaX}[\mathrm{X}=\mathrm{Cl}, \mathrm{Br}] \\& \text { e.g. } \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Br}+\mathrm{Nal} \longrightarrow \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{l}+\mathrm{NaBr}\end{aligned}\)
MHTCET - 2017
CHXII10:HALOALKANES AND HALOARENES
322483
Assertion : Alkyl iodide can be prepared by treating alkyl chloride/bromide with \(\mathrm{NaI}\) in acetone. Reason : \(\mathrm{NaCl} / \mathrm{NaBr}\) are soluble in acetone while \(\mathrm{NaI}\) is not.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
This is Finkelstein reaction which involves the conversion of an alkyl chloride/bromide to an alkyl iodide by the addition of sodium iodide in acetone. Because sodium iodide is soluble in acetone and \(\mathrm{NaCl}\) and \(\mathrm{NaBr}\) are not, the equilibrium is shifted by the precipitation of insoluble salt. So option (3) is correct.
CHXII10:HALOALKANES AND HALOARENES
322484
Assertion : Alkyl iodides darken on standing. Reason : Alkyl iodides are prepared by Finkelstein reaction.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Less stable iodides tend to lose two iodine atoms. These liberated iodine atoms (2 I) are then absorbed by other iodides, causing a darkening in their color. Alkyl iodides are indeed prepared by Finkelstein reaction. But it is not the correct explanation for the assertion. So option (2) is correct.
CHXII10:HALOALKANES AND HALOARENES
322485
Which reaction is useful in exchange of halogen in alkyl chloride by iodide?
1 Wurtz reaction
2 Finkelstein reaction
3 Reimer-Tiemann reaction
4 Williamson synthesis
Explanation:
The reaction is useful in exchange of halogen in alkyl chloride by iodide is Finkelstein reaction. This reaction is used in preparation of alkyl iodide by the reaction of alkyl chloride, bromide with \(\mathrm{Nal}\) in dry acetone. e.g. \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{Br + Nal}}\) \(\xrightarrow[\Delta ]{{{\text{Acetone}}}}\) \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{l + NaBr}}\)
322482
The conversion of ethyl bromide using sodium iodide and dry acetone, this reaction is known as
1 Swarts reaction
2 Finkelstein reaction
3 Sandmeyer reaction
4 Stephen reaction
Explanation:
Alkyl iodides and fluorides are prepared by the \(\mathrm{S}_{\mathrm{N}} 2\) mechanism. Alkyl chlorides or bromides reacts with \(\mathrm{Nal}\) in dry acetone to gives alkyl iodine. This reaction is known as Finkelstein reaction. \(\begin{aligned}& \mathrm{R}-\mathrm{X}+\mathrm{Nal} \longrightarrow \mathrm{R} 1+\mathrm{NaX}[\mathrm{X}=\mathrm{Cl}, \mathrm{Br}] \\& \text { e.g. } \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Br}+\mathrm{Nal} \longrightarrow \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{l}+\mathrm{NaBr}\end{aligned}\)
MHTCET - 2017
CHXII10:HALOALKANES AND HALOARENES
322483
Assertion : Alkyl iodide can be prepared by treating alkyl chloride/bromide with \(\mathrm{NaI}\) in acetone. Reason : \(\mathrm{NaCl} / \mathrm{NaBr}\) are soluble in acetone while \(\mathrm{NaI}\) is not.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
This is Finkelstein reaction which involves the conversion of an alkyl chloride/bromide to an alkyl iodide by the addition of sodium iodide in acetone. Because sodium iodide is soluble in acetone and \(\mathrm{NaCl}\) and \(\mathrm{NaBr}\) are not, the equilibrium is shifted by the precipitation of insoluble salt. So option (3) is correct.
CHXII10:HALOALKANES AND HALOARENES
322484
Assertion : Alkyl iodides darken on standing. Reason : Alkyl iodides are prepared by Finkelstein reaction.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Less stable iodides tend to lose two iodine atoms. These liberated iodine atoms (2 I) are then absorbed by other iodides, causing a darkening in their color. Alkyl iodides are indeed prepared by Finkelstein reaction. But it is not the correct explanation for the assertion. So option (2) is correct.
CHXII10:HALOALKANES AND HALOARENES
322485
Which reaction is useful in exchange of halogen in alkyl chloride by iodide?
1 Wurtz reaction
2 Finkelstein reaction
3 Reimer-Tiemann reaction
4 Williamson synthesis
Explanation:
The reaction is useful in exchange of halogen in alkyl chloride by iodide is Finkelstein reaction. This reaction is used in preparation of alkyl iodide by the reaction of alkyl chloride, bromide with \(\mathrm{Nal}\) in dry acetone. e.g. \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{Br + Nal}}\) \(\xrightarrow[\Delta ]{{{\text{Acetone}}}}\) \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{l + NaBr}}\)
322482
The conversion of ethyl bromide using sodium iodide and dry acetone, this reaction is known as
1 Swarts reaction
2 Finkelstein reaction
3 Sandmeyer reaction
4 Stephen reaction
Explanation:
Alkyl iodides and fluorides are prepared by the \(\mathrm{S}_{\mathrm{N}} 2\) mechanism. Alkyl chlorides or bromides reacts with \(\mathrm{Nal}\) in dry acetone to gives alkyl iodine. This reaction is known as Finkelstein reaction. \(\begin{aligned}& \mathrm{R}-\mathrm{X}+\mathrm{Nal} \longrightarrow \mathrm{R} 1+\mathrm{NaX}[\mathrm{X}=\mathrm{Cl}, \mathrm{Br}] \\& \text { e.g. } \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Br}+\mathrm{Nal} \longrightarrow \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{l}+\mathrm{NaBr}\end{aligned}\)
MHTCET - 2017
CHXII10:HALOALKANES AND HALOARENES
322483
Assertion : Alkyl iodide can be prepared by treating alkyl chloride/bromide with \(\mathrm{NaI}\) in acetone. Reason : \(\mathrm{NaCl} / \mathrm{NaBr}\) are soluble in acetone while \(\mathrm{NaI}\) is not.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
This is Finkelstein reaction which involves the conversion of an alkyl chloride/bromide to an alkyl iodide by the addition of sodium iodide in acetone. Because sodium iodide is soluble in acetone and \(\mathrm{NaCl}\) and \(\mathrm{NaBr}\) are not, the equilibrium is shifted by the precipitation of insoluble salt. So option (3) is correct.
CHXII10:HALOALKANES AND HALOARENES
322484
Assertion : Alkyl iodides darken on standing. Reason : Alkyl iodides are prepared by Finkelstein reaction.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Less stable iodides tend to lose two iodine atoms. These liberated iodine atoms (2 I) are then absorbed by other iodides, causing a darkening in their color. Alkyl iodides are indeed prepared by Finkelstein reaction. But it is not the correct explanation for the assertion. So option (2) is correct.
CHXII10:HALOALKANES AND HALOARENES
322485
Which reaction is useful in exchange of halogen in alkyl chloride by iodide?
1 Wurtz reaction
2 Finkelstein reaction
3 Reimer-Tiemann reaction
4 Williamson synthesis
Explanation:
The reaction is useful in exchange of halogen in alkyl chloride by iodide is Finkelstein reaction. This reaction is used in preparation of alkyl iodide by the reaction of alkyl chloride, bromide with \(\mathrm{Nal}\) in dry acetone. e.g. \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{Br + Nal}}\) \(\xrightarrow[\Delta ]{{{\text{Acetone}}}}\) \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{l + NaBr}}\)
