Give the decreasing order of acidic character.
(1) `NO_2CH_2 OH`,
(b) `C1CH_2COOH`,
(c) `HCOOH`,
(d) `CH_3 COOH`,
( e) `CH_3 OH`
(2) (a) `RCOOH`
(b) `ROH`
( c) `H_2 O`
(d) `NH_3`
( e) `CH -= CH`
(f) `RH`
(3) (a) `HCOOH`
(b) `PhOH`
( c) `CH_3OH`
(d) `C_2 H_5OH`
( e)`CH_3 C -= CH`
(f) `CH -= CH`,
(g) `NH_3`
(4) (a) `CH_3COOH`
(b) `H_3O^(oplus)`
( c) `H_2O`
(d) `C_2H_5 COOH`
( e) `NH_3`
(f) `CH -= CH`
(g) `CH_2 = CH_2`
(h) `CH_4`
(i) `C_2 H_6`.
(5) (a) `H_2 O`
(b) `CH_3OH`
( c) `RC -= CH`
(d) `H_2`
( e) `NH_3`
(f) `RH`
(g) `ROH`
(6) Basic character of conjugate base of Problem `5`.

Explanation

(1) `b gt c gt d gt a gt e`
(2) `a gt c gt b gt e gt d gt f`
(3) `a gt b gt c gt d gt f gt e gt g gt h`
(4) `b gt a gt d gt c gt f gt e gt g gt h gt i`
(5) `b gt a gt g gt c gt d gt e gt f`
(6) `b lt a lt g lt c lt d lt e lt f`
(The stronger is the acid, the weaker is its conjugate base).