1)both true
2)reason false
3)both true(electron withdrawing effect of two oxygen stabilises the conjugate base)
5)reason false
1. Statement-I : Benzoic acid is a weaker acid than formic acid
Statement-II : Phenyl group when attached to carbonyl group becomes electron donating.
2. Statement-I : Pb4+ can be reduced rasily to Pb2+
Statement-II : Pb2+ is paramagnetic
3. Statement-I : HNO3 is stronger acid than HNO2.
Statement-II : In HNO3 there are two N – O bonds whereas in HNO2, there is only one N – O bond
4. Statement-I : Zn2+ is diamagnetic.
Statement-II : The electrons are lost from 4s – orbital to form Zn2+.
5. Statement-I : Nitration of anilline can be done by protecting – NH2 group through acetylation.
Statement-II : Acetylation of aniline results in the increase of electron density in the benzene ring.
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10 Answers
1: reason is false
3. reason is false
4. both are true but reason dosent explain the assertion
2. same as 4
5: same as 4
So acetylation of aniline electron density decreases on benzene ring ..
Pb belongs to grp 14 carbon grp..config ns2np2 if 2 electrons are lost from p the cation becomes dimagnetic...