Compare nucleophilicity in the following groups of compounds

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Greater nucleophilicity is of
Q1 b
Q2 a

Do let me know if the answers are correct

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Answer of 1 will be c-c-o(-) because nucleophilic strength is reverse of acidic strength.
Similarly order of 2 question will be 1>2.
Reason is same.

But I think in Q2 b>a because in 'a' nucleophilicity will be reduced due to steric hindrance

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Lesser is the stability of -ve charge , more is it’s tendency to attack as a nucleophile

Yes 2 should be B.
Because nucleophilocity is kinetically controlled product and though negative chatge concentration increases but it is sterically hindered way too much comapred to other compound

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Yes
For both 1 and 2 it should be B