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Among isomeric o,m-and p-anisidines,is t...

Among isomeric o,m-and p-anisidines,_____is the weakest base.

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To determine which isomer of anisidine (ortho, meta, or para) is the weakest base, we need to analyze the effects of the methoxy group (-OCH3) on the amino group (-NH2) in each position. ### Step-by-Step Solution: 1. **Understanding Anisidine Structure**: - Anisidine is an aromatic amine where a methoxy group (-OCH3) is attached to the benzene ring. The three isomers are ortho-anisidine, meta-anisidine, and para-anisidine. 2. **Basicity of Amines**: ...
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Which of these is the weakest base?

Assertion: Among hydroxides of alkali metals, LiOH is the weakest base. Reason: Among alkali metals, lithium has the highest ionisation energy .

Which of the following anions is the weakest base ?

Which of fllowing is the weakest base ?

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion of the assertion. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion. (c) If assertion is true but reason is false. (d) If assertion is false but reason is true. Q. Assertion: M-Methoxyaniline (m-anisidine) is a weaker base than p-methoxyaniline (p-anisidine). Reason: At m-position methoxy group can exert only +R- effect but not -I effect.

Knowledge Check

  • Which is the weakest base

    A
    `NaOH`
    B
    KOH
    C
    `Ca(OH)_(2)`
    D
    `Zn(OH)_(2)`

  • Which is the weakest base :

    A
    B
    C
    D
    `CH_(3)NH_(2)`

  • Which is weakest base ?

    A
    `C_(6)H_(5)-CH_(2)-NH_(2)`
    B
    `C_(6)H_(5)-CH_(2)-NH-CH_(3)`
    C
    `O_(2)N-CH_(2)-NH_(2)`
    D
    `CH_(3)-NH-CHO`
    • PRADEEP-ORGANIC COMPOUNDS CONTAINING NITROGEN-TEST YOUR GRIP FILL IN THE BLANKS
    1. The boiling points of amines arethan those of alcohols of comparable m...

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    2. The basic character of amines is due to the .

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    3. Benzylamine isbasic than aniline.

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    4. Among isomeric o,m-and p-anisidines,is the weakest base.

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    5. Benzenamine reacts with benzoyl chloride in presence of aqueous sodium...

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    6. Secondary amines react with aldehydes and ketones containing alpha -hy...

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    7. Primary amines on heating with chloroform and alcoholic potash giveand...

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    8. N-methyl aniline on reaction with nitrous acid gives

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    9. Ethyl amine on heating with CS(2) in presence of HgCl(2) forms

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    10. The reaction of aniline with sodium nitrite and HCl at 293K to form be...

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    11. Libermann nitroso reaction is used for the detection of ........ amine...

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    12. Tetra-alkyl ammonium salts are called salts.

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    13. Phenol on treatment with bromine water gives

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    14. Nitration of acetanilide with conc HNO(3)+conc.H(2)SO(4) mixture follo...

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    15. Ethanamine reacts with benzenesulphonyl chloride to formwhich dissolve...

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    16. Carbylamine test is used to test ............. amines.

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    17. amine does not react with Hinsberg's reagent.

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    18. Deamination of arylamines via diazonium salts is best achieved by

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    19. Preparation of chlorobenzene from benzenediazonium chloride with cupro...

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    20. Coupling of diazotised withgives methyl orange.

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