90841
Identify the products $A$ and $B$ in the reactions: $\mathrm{R}-\mathrm{X}+\mathrm{AgCN} \rightarrow \mathrm{A}+\mathrm{AgX}$ $\mathrm{R}-\mathrm{X}+\mathrm{KCN} \rightarrow \mathrm{B}+\mathrm{KX}$
$\mathrm{R}-\mathrm{X}+\mathrm{AgCN} \longrightarrow \mathrm{RNC}+\mathrm{AgX}$ This reaction proceed through nucleophilic substitution mechanism. $\mathrm{CN}^{-}$nucleophile is ambidentate nucleophile because it has more than one attacking site. In $\mathrm{AgCN}$ covalent bonding is present. So, here nitrogen electron pair is available for bonding. So, it attacks from nitrogen side. $\mathrm{R}-\mathrm{X}+\mathrm{KCN} \longrightarrow \mathrm{RCN}+\mathrm{KX}$ This reaction is also proceed through nucleophilic substitution. $\mathrm{CN}^{-}$nucleophile is ambidentate nucleophile because it has more than one attacking site. But in $\mathrm{KCN}$ ionic bonding is present. Due to ionic bonding, $\mathrm{C}-\mathrm{C}$ bond is more stable than $\mathrm{C}-\mathrm{N}$ bond. So, it attacks from carbon side.
Shift-I]**
HALOALKANES AND HALOARENES
90856
The correct order of reactivity of the given chlorides with acetate in acetic acid is:
1
2
3
4
Explanation:
The correct order- Acetate ion in acetic acid is a weak nucleophile cause $\mathrm{S}_{\mathrm{N}} 1$. Also the substrate allylic halides prefer $\mathrm{S}_{\mathrm{N}} 1$ reaction over $\mathrm{S}_{\mathrm{N}} 2$. Thus, more stable the carbocation forms, more faster will be the reaction.
31 Aug Shift-I]**
HALOALKANES AND HALOARENES
90833
On the surface of polar stratospheric clouds, hydrolysis of chlorine nitrate gives $A$ and $B$ while its reaction with $\mathrm{HCl}$ produces $B$ and $C$. $A, B$ and $C$ are, respectively
For the same alkyl group the boiling point of alkyl halides follow the order- $\mathrm{RI}>\mathrm{RBr}>\mathrm{RCl}>\mathrm{RF}$ This is because the magnitude of van der waals forces increases with increase in size and mass of halogen atom.
90841
Identify the products $A$ and $B$ in the reactions: $\mathrm{R}-\mathrm{X}+\mathrm{AgCN} \rightarrow \mathrm{A}+\mathrm{AgX}$ $\mathrm{R}-\mathrm{X}+\mathrm{KCN} \rightarrow \mathrm{B}+\mathrm{KX}$
$\mathrm{R}-\mathrm{X}+\mathrm{AgCN} \longrightarrow \mathrm{RNC}+\mathrm{AgX}$ This reaction proceed through nucleophilic substitution mechanism. $\mathrm{CN}^{-}$nucleophile is ambidentate nucleophile because it has more than one attacking site. In $\mathrm{AgCN}$ covalent bonding is present. So, here nitrogen electron pair is available for bonding. So, it attacks from nitrogen side. $\mathrm{R}-\mathrm{X}+\mathrm{KCN} \longrightarrow \mathrm{RCN}+\mathrm{KX}$ This reaction is also proceed through nucleophilic substitution. $\mathrm{CN}^{-}$nucleophile is ambidentate nucleophile because it has more than one attacking site. But in $\mathrm{KCN}$ ionic bonding is present. Due to ionic bonding, $\mathrm{C}-\mathrm{C}$ bond is more stable than $\mathrm{C}-\mathrm{N}$ bond. So, it attacks from carbon side.
Shift-I]**
HALOALKANES AND HALOARENES
90856
The correct order of reactivity of the given chlorides with acetate in acetic acid is:
1
2
3
4
Explanation:
The correct order- Acetate ion in acetic acid is a weak nucleophile cause $\mathrm{S}_{\mathrm{N}} 1$. Also the substrate allylic halides prefer $\mathrm{S}_{\mathrm{N}} 1$ reaction over $\mathrm{S}_{\mathrm{N}} 2$. Thus, more stable the carbocation forms, more faster will be the reaction.
31 Aug Shift-I]**
HALOALKANES AND HALOARENES
90833
On the surface of polar stratospheric clouds, hydrolysis of chlorine nitrate gives $A$ and $B$ while its reaction with $\mathrm{HCl}$ produces $B$ and $C$. $A, B$ and $C$ are, respectively
For the same alkyl group the boiling point of alkyl halides follow the order- $\mathrm{RI}>\mathrm{RBr}>\mathrm{RCl}>\mathrm{RF}$ This is because the magnitude of van der waals forces increases with increase in size and mass of halogen atom.
90841
Identify the products $A$ and $B$ in the reactions: $\mathrm{R}-\mathrm{X}+\mathrm{AgCN} \rightarrow \mathrm{A}+\mathrm{AgX}$ $\mathrm{R}-\mathrm{X}+\mathrm{KCN} \rightarrow \mathrm{B}+\mathrm{KX}$
$\mathrm{R}-\mathrm{X}+\mathrm{AgCN} \longrightarrow \mathrm{RNC}+\mathrm{AgX}$ This reaction proceed through nucleophilic substitution mechanism. $\mathrm{CN}^{-}$nucleophile is ambidentate nucleophile because it has more than one attacking site. In $\mathrm{AgCN}$ covalent bonding is present. So, here nitrogen electron pair is available for bonding. So, it attacks from nitrogen side. $\mathrm{R}-\mathrm{X}+\mathrm{KCN} \longrightarrow \mathrm{RCN}+\mathrm{KX}$ This reaction is also proceed through nucleophilic substitution. $\mathrm{CN}^{-}$nucleophile is ambidentate nucleophile because it has more than one attacking site. But in $\mathrm{KCN}$ ionic bonding is present. Due to ionic bonding, $\mathrm{C}-\mathrm{C}$ bond is more stable than $\mathrm{C}-\mathrm{N}$ bond. So, it attacks from carbon side.
Shift-I]**
HALOALKANES AND HALOARENES
90856
The correct order of reactivity of the given chlorides with acetate in acetic acid is:
1
2
3
4
Explanation:
The correct order- Acetate ion in acetic acid is a weak nucleophile cause $\mathrm{S}_{\mathrm{N}} 1$. Also the substrate allylic halides prefer $\mathrm{S}_{\mathrm{N}} 1$ reaction over $\mathrm{S}_{\mathrm{N}} 2$. Thus, more stable the carbocation forms, more faster will be the reaction.
31 Aug Shift-I]**
HALOALKANES AND HALOARENES
90833
On the surface of polar stratospheric clouds, hydrolysis of chlorine nitrate gives $A$ and $B$ while its reaction with $\mathrm{HCl}$ produces $B$ and $C$. $A, B$ and $C$ are, respectively
For the same alkyl group the boiling point of alkyl halides follow the order- $\mathrm{RI}>\mathrm{RBr}>\mathrm{RCl}>\mathrm{RF}$ This is because the magnitude of van der waals forces increases with increase in size and mass of halogen atom.
NEET Test Series from KOTA - 10 Papers In MS WORD
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HALOALKANES AND HALOARENES
90841
Identify the products $A$ and $B$ in the reactions: $\mathrm{R}-\mathrm{X}+\mathrm{AgCN} \rightarrow \mathrm{A}+\mathrm{AgX}$ $\mathrm{R}-\mathrm{X}+\mathrm{KCN} \rightarrow \mathrm{B}+\mathrm{KX}$
$\mathrm{R}-\mathrm{X}+\mathrm{AgCN} \longrightarrow \mathrm{RNC}+\mathrm{AgX}$ This reaction proceed through nucleophilic substitution mechanism. $\mathrm{CN}^{-}$nucleophile is ambidentate nucleophile because it has more than one attacking site. In $\mathrm{AgCN}$ covalent bonding is present. So, here nitrogen electron pair is available for bonding. So, it attacks from nitrogen side. $\mathrm{R}-\mathrm{X}+\mathrm{KCN} \longrightarrow \mathrm{RCN}+\mathrm{KX}$ This reaction is also proceed through nucleophilic substitution. $\mathrm{CN}^{-}$nucleophile is ambidentate nucleophile because it has more than one attacking site. But in $\mathrm{KCN}$ ionic bonding is present. Due to ionic bonding, $\mathrm{C}-\mathrm{C}$ bond is more stable than $\mathrm{C}-\mathrm{N}$ bond. So, it attacks from carbon side.
Shift-I]**
HALOALKANES AND HALOARENES
90856
The correct order of reactivity of the given chlorides with acetate in acetic acid is:
1
2
3
4
Explanation:
The correct order- Acetate ion in acetic acid is a weak nucleophile cause $\mathrm{S}_{\mathrm{N}} 1$. Also the substrate allylic halides prefer $\mathrm{S}_{\mathrm{N}} 1$ reaction over $\mathrm{S}_{\mathrm{N}} 2$. Thus, more stable the carbocation forms, more faster will be the reaction.
31 Aug Shift-I]**
HALOALKANES AND HALOARENES
90833
On the surface of polar stratospheric clouds, hydrolysis of chlorine nitrate gives $A$ and $B$ while its reaction with $\mathrm{HCl}$ produces $B$ and $C$. $A, B$ and $C$ are, respectively
For the same alkyl group the boiling point of alkyl halides follow the order- $\mathrm{RI}>\mathrm{RBr}>\mathrm{RCl}>\mathrm{RF}$ This is because the magnitude of van der waals forces increases with increase in size and mass of halogen atom.
