Question

Arrange the following:

(i) In decreasing order of the pKb

values:

C2H5NH2

, C6H5NHCH3

, (C2H5

)2NH and C6H5NH2

(ii) In increasing order of basic strength:

C6H5NH2

, C6H5N(CH3

)2

, (C2H5

)2NH and CH3NH2

(iii) In increasing order of basic strength:

(a) Aniline, p-nitroaniline and p-toluidine​

Answer 1

Answer:

There are 3 significant digits in 61.

Hope this helps.