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Ans. this with the perfect reason.....and plzz koi ye maat ans. mai likhna that mujhe nai aata....teacher se puch lo etc. etc.​

Answer»

HERE IS YOUR ANS.

we know that the basic strength of amines can be explain with the help of inductive effect and resonance.

but here in the given question we can see clearly there is no resonance but we can explain the this question with the help of inductive effect..

so, we know that methyl and ethyl which are electron pushing groups shows plus I effect (+l) ..

but here the case of steric hindrance is ALSO included..

so, steric hindrance is the the effect which is caused by large ALKYL group surround a FUNCTIONAL group which is amine..(-NH2)

so, increasing order of basic strength is:-

B > a > d >C

increasing basic strength .

so it has a mean option B will be the most basic compound here..

hope it helps..



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