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Maximum pKb value of...

Maximum `pK_b` value of

A

B

`(CH_3CH_2)_2NH`

C

`(CH_3)_2NH`

D

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Verified by Experts

The correct Answer is:
A

`pK_b` value is log inverse of `K_b` i.e., `pK_b(=-logK_b)` so it is maximum for the weakest base and presence of two electron withdrawing phenyl group, makes the `NH` of (d) Attracting `H^(+)` decreases i.e., `pK_b` value increase.
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A2Z-ORGANIC COMPOUNDS CONTAINING NITROGEN-Section D - Chapter End Test
  1. Maximum pKb value of

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  2. Which of the following nitro compounds will show tautomerism?

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  3. Gabriel synthesis is used for the preparation of

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  4. The major product of the reaction is:

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  5. Which of the following statement is correct?

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  6. Which of the following is the weakest base?

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  7. Only one the following amines will lose its nitrogen atom as trimehyl ...

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  8. Which of the following cannot react with HNO2?

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  9. In order to distinguigh between C2H5NH2 and C6H5NH2 which of the fol...

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  10. Which of the following amines reacts most rapidly with

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  11. Which of the following produces one mononitro and three isomeric dinit...

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  12. The conjugate base of (CH3)2NH2^(Theta) is:

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  13. Identify major product of following sequency of reaction:

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  14. Primary and secondary amines are distinguished by:

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  15. The product of the reaction of alcoholic silver nitrite with ethyl bro...

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  16. Identify the final product of following sequence of reaction:

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  17. Tertiary nitro compounds cannot show tautomerism becauses :

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  18. When C6H5N2Cl is reduced with Na2SnO2, the product is:

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  19. Identify final product of following sequence of reaction:

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  20. Which of the following substances on treatment with P2O5 gives ethanen...

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  21. Which of the following reagents on treatment with benzenamine in basic...

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