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  3. Chemistry
  4. Which is correct statement?

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Q. Which is correct statement?

Delhi UMET/DPMTDelhi UMET/DPMT 2011Aldehydes Ketones and Carboxylic Acids

Solution:

[a] $o$-nitrobenzoic acid is the strongest acid among all the nitrobenzoic acids due to ortho effect and stabilization of carboxylate ion by nitro group.
[b] Branched carboxylic acids are less acidic than unbranched acids due to + $ I $ -effect of alkyl groups.
[c] $o$-hydroxybenzoic acid is stronger acid than $o$-methoxybenzoic acid due to stabilization of carboxylate ion by $H$-bonding.
[d] Succinic acid is stronger acid than butanoic acid.
This is due to -$I$-effect of one carboxyl group on the other end.

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