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Electrophilic Substitution Reaction

CH3-CH2-X+KOH...

Question

$C H_{3} - C H_{2} - X + K O H_{(} a l c) \to C H_{2} = C H_{2} + K X + H_{2} O$

These type of reactions are called_______________.

A

addition reactions

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B

substitution reactions

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C

elimination reactions

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D

molecular rearrangement

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Solution

The correct option is C elimination reactions
In the above reaction, a strong base eliminates a hydrogen and a halide reaction from an alkyl halide to give an alkene.

Such reactions are termed as beta-elimination reactions (or E2 elimination reactions)

So, C is the correct answer.

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Similar questions

Q. Complete the following chemical reactions and write the products.
(i)

C H_{3} - C H_{2} - C l + K O H (a l c .) \to

R - C H = C H_{2} + H B r P e r o x i d e - ---- \to

Q. Identify the type of the following reaction of carbon compounds.
a. CH₃ -CH₂ -CH₂-OH → CH₃ -CH₂ -COOH
b. CH₃ -CH₂ -CH₃ → 3CO₂ + 4H₂O
c. CH₃ -CH = CH -CH₃ + Br₂ → CH₃ -CHBr - CHBr -CH₃
d. CH₃ -CH₃ + Cl₂→ CH₃ -CH₂ -Cl + HCl
e. CH₃-CH₂ -CH₂ -CH₂ -OH → CH₃ -CH₂ -CH=CH₂ + H₂O
f. CH₃-CH₂ -COOH + NaOH → CH₃ -CH₂ -COO - Na⁺ + H₂O
g. CH₃ -COOH + CH₃ -OH → CH₃ -COO- CH₃ + H₂O

Q. Match the column

A, B

C

Reactabts $(A)$	Products $(B)$	Name of the reaction $(C)$
$C H_{3} - C H_{3} + C l_{2}$	$C O_{2} + H_{2} O$	Addition reaction
$C_{2} H_{6} + O_{2}$	$C H_{2} = C H_{2}$	Thermal cracking
$_{n} C H_{2} = C H_{2}$	$C H_{2} = C H_{2} + C H_{4}$	Substitution reactions
$C H_{3} - C H_{2} - C H_{3}$	$C H_{3} - C H_{2} C l + H C l$	Polymerisation
$C H \equiv C H + H_{2}$	$[- C H_{2} - C H_{2} -]_{n}$	Combustion

Q. The reaction of propene with

H O C l (C l_{2} + H_{2} O)

proceeds through the intermediate:

Q. Explain the mechanism of the following reaction.

2 C H_{3} - C H_{2} - O H H^{+} - -- \to 413 K C H_{3} - C H_{2} - O - C H_{2} - C H_{3} + H_{2} O

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