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SN1 Reaction Mechanism

C6H6CI6C6H6CI...

Question

$C_{6} H_{6} C I_{6} C_{6} H_{6} C I_{6}$ on treatment with alcoholic KOHKOH yields .
A : $C_{6} H_{6} C_{6} H_{6}$
B : $C_{6} H_{3} C I_{3} C_{6} H_{3} C I_{3}$
C : ( $C_{6} H_{6}$ ) $O H$ ( $C_{6} H_{6}$ ) $O H$
D : $C_{6} H_{6} C I_{4}$

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Solution

$C_{6} H_{6} C I_{6}$ + $3 K O H$ $\to$ $C_{6} H_{3} C l_{3} C I_{3}$ + $3 K C I$ + $3 H_{2} O$
Thus benzene hexahalides decompose when heated with alc $K O H$ and yield trichloro benzene .

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C_{6} H_{6} C l_{6},

on treatment with alcoholic

K O H,

C_{5} H_{11} O H

on dehydration gives an alkene,
which on oxidative ozonolysis yields a mixture of a ketone and an acid. The alcohol is:

Q. In the given reaction,

C_{6} H_{6} + B r_{2} \to C_{6} H_{5} B r + H B r

39 g m

C_{6} H_{6}

40 g m

B r_{2}

. It was found that

19.625 g m

C_{6} H_{5} B r

was obtained. Calculate the percentage yield of the reaction.

Q. Which one of the following alcohols is most reactive for

S_{N} 1

reaction?

$(a) C H_{3} - O H | C | C H_{3} - C H_{3} (b) C_{6} H_{5} - O H | C | C H_{3} - C_{6} H_{5}$
$(c) C H_{3} - O H | C | C H_{3} - C H_{3} (d) C H_{3} - O H | C - C H_{3}$

Q. Treatment of a

2^{o} O H

C r O_{3} / H_{2} S O_{4}

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