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Class 12
CHEMISTRY
Assertion: Aryl halides undergo nucleoph...

Assertion: Aryl halides undergo nucleophilic substitution reactions with ease.
Reason: The carbon halogen bond in aryl halides has partial double bonds character.

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Text Solution

Verified by Experts

The correct Answer is:
D

Aryl halides do ot undergo nucleophillic substituion reaction under ordinary conditions. Thus, statement `1` is incorrect. In aryl halides, the carbon-halogen bond has a partical double bond character, so it becomes shorter and stronger and cannot be easily reaplaced by a nuclephile. Statement 2 is true.

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Assertion: Aryl undergoes nucleophilic substitution with ease
Reason The carbon halogen bond in aryl halides has partial double bond character .

In their nucleophilic substitution reactions, aryl halide resembles

Aryl halides do not undergo nucleophilic substitution reactions under ordinary conditions because: (1). Approach of nucleophile is retarded (2). Carbon carrying halogen atom is sp^(3) hybridised. (3). The substrate molecule is destabilised due to resonance (4). of partial double bond character between carbon and halogen.

Assertion: Vinyl halides are reactive towards nucleophilic substitution reactions.
Reason: Reactivity is due to the polarity of the carbon halogen bond.

Assertion: Aryl halides undergo nucleophilic substitution reactions with ease. Reason:The carbon halogen bond in aryl halides has partial double bonds character.

Aryl halides do not undergo uncleophilic substitution reactions under ordinary conditions because
(1) Approach of nucleophile is retarded
(2) Carbon carrying halogen atom is `sp^(3)` hybridised
(3) The substrate molecule is destabilised due to resonance
(4) Partial double bond character between carbon and halogen

वक्तव्य I ऐरिल हैलाइड सुगमता से नाभिकस्नेही प्रतिस्थापन अभिक्रियाएँ देते हैं |
वक्तव्य II ऐरिल हैलाइड में कार्बन - हैलोजन बंध आंशिक द्विबंध लक्षण रखता है |

Assertion (A ) : Aryl halides undergo nucleophilic sunstitution reaction with ease.
The carbon halogen bond in aryl halides has partial double bonds character.

Aryl halides are less reactive than alkyl halides due to the presence partial double character of C - X bond in aryl halides. Arly halides undergo nucleophilic substitution reactions, if electron withdrawing groups are introduced in ortho & para - positions in aryl halides. The reaction mechanism involves two steps. Keeping these points in view answer the following questions.
Which of the following is the correct order of reactivity of the aryl halides with a given nucleophile

Aryl halides are less reactive than alkyl halides due to the presence partial double character of C - X bond in aryl halides. Arly halides undergo nucleophilic substitution reactions, if electron withdrawing groups are introduced in ortho & para - positions in aryl halides. The reaction mechanism involves two steps. Keeping these points in view answer the following questions.
Which compound undergo nucleophilic substitution under mild conditions

Assertion: Aryl halides undergo nucleophilic substitution reactions with ease.
Reason:The carbon halogen bond in aryl halides has partial double bonds character.

Aryl halides are less reactive towards nucleophilic substitution reactions. Write any two reasons for the less reactivity of aryl halides.

Aryl halides are less reactive in nucleophilic substitution reactions.Give one example tor nucleophilic substitution reactions of aryl halides.

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