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Assertion: In strongly acidic solutions,...

Assertion: In strongly acidic solutions, aniline becomes more reactive towards electrophilic reagents.
Reason: the amino group being completely protonate din strongly acidic solution, the lone pair of electrons on the nitrogen is no longer available for resonance.

A

Both assertion and Reason are true and Reason is the correct explanation of Assertion.

B

Both Assertion and Reason are true and Reason are true but Reason is not correct explanation of Assertion.

C

Assertion is true but Reason is false.

D

Assertion is false but Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
D
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Organic compounds containing amine as functional group are present in a vivid variety of compounds, namely amino acids, hormones, neurotransmitters, DNA, alkaloids, dyes, stc. Drugs including nicotine group in one form or another. Amines are basic because of the presence of lone pair of electrons on nitrogen. Addition of nitrogen into an organic framework leads to the formation of two families of molecules, namely amines and amides. As chemistry students, we must appreciate the versatility of nitrogen. Give one point of difference between acidic and basic amino acid.

Organic compounds containing amine as functional group are present in a vivid variety of compounds, namely amino acids, hormones, neurotransmitters, DNA, alkaloids, dyes, stc. Drugs including nicotine group in one form or another. Amines are basic because of the presence of lone pair of electrons on nitrogen. Addition of nitrogen into an organic framework leads to the formation of two families of molecules, namely amines and amides. As chemistry students, we must appreciate the versatility of nitrogen. Why are amino acids amphoteric ?

Knowledge Check

  • Statement I: In strongly acidic solutions , anline becomes more reactive towards electrophilic reagents ltbRgt Statement II: The amino group being completely protonated in strongly acidic solution, the line pair of electrons on nitrogen is no longer avalible for resonace.

    A
    Statement (I) is true : Statement (II) is true : Statement (II) is the correct esplanation of Statement (I)
    B
    Statement (I) is true : Statement (II) is true , Statement (II) is not the correct exphanation fo sTatement (I)
    C
    Statement I is True, Statament II is false
    D
    Statement (I) is false , Statement (II) is true .

  • Statement-1: In strongly acid solutions, aniline becomes less reactive less reactive towards electrophilic reagents. Statement-2: The amino group being completely protonated in strongly acidic solution, the lone pair of electrons on the nitrogen in no longer available for resonance.

    A
    Statement-1 is true, statement-2 is true, statement-2 is a correct explanation for statement-1
    B
    Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-1
    C
    Statement-1 is true, statement-2 is false
    D
    Statement-1 is false, statement-2 is true

  • Assertion: Phenol is more reactive than benzene towards electrophilic reactions. Reason : The +R effect of OH group increases the electron density on benzene nucleus.

    A
    Both A and R are correct and R is correct explanation of A
    B
    Both A and R are correct but R is not the correct explanation of A
    C
    A is correct but R is in correct
    D
    A is incorrect but R is correct

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    Assertion: Acetanilide is more reactive than aniline towards electrophilic substitution reactions. Reason: The activating effect of NHCOCH_3 is less than that of amino group

    Assertion. Propene is more reactive than ethene towards electrophilic addition reactions Reason. Hyperconjugation effect of the CH_3 group increases the electron density in the double bond

    Assertion : Anilinium chloride is more acidic towards electrophilic substitution than ammonium chloride. reaction. Reason : Anilinium chloride is resonance stabilised

    Assertion (A) : Phenol is strongly acidic than ethanol. Reason (R) : Phenoxide ion is more stabilized by resonance than ethoxide ion.

    Assertion : C_(2)H_(5)OH is a weaker acid than phenol but is a stronger nucleophile than phenol. Reason : In phenol, lone pair of electrons on oxygen is directed towards the ring due to resonance.

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