The correct order for decreasing stability of the following free radicals is
II>IV>III>I
I>II>III>IV
III>IV>II>I
II>III>IV>I
Order of decreasing acidity of the following is
(I) HCOOH
(II) CH3COOH
(III) Cl2CHCOOH
(IV) CF3COOH
The stability of carbanions in the following
i) RC≡⊖C
ii)
iii) R2C=⊖CH
iv) R3C−⊖CH2
is in the order of