Chemistry - GOC Question with Solution | TestHub
For the following given compound
Number of correct statement(s):
(1) The correct acidic strength order is: .
(2) Compound (S) has 5 resonating structures.
(3) The correct acidic strength order is: .
(4) Out of 8 compounds, only 2 are insoluble in aqueous NaOH.
(5) The total molecular mass of gas evolved when the given compounds are treated with one by one is 126 gm.
(6) Compound (Q) is more acidic than compound (W) due to H-bonding.
(7) Out of 8 compounds, only 7 will evolve gas with Na metal.
Answer:
Solution:
Statement (1) is CORRECT: Picric acid (U, ) > Carbonic acid (T, ) > Phenol (S, ) > Methanol (V, ).
Statement (2) is CORRECT: Phenol (S) stabilizes its conjugate base and neutral form through exactly 5 resonating structures.
Statements (3) to (7) are INCORRECT: Water is less acidic than methanol (making 3 false); Q (m-cresol) is far less acidic than W (p-nitrophenol) due to the electron-donating methyl group vs. electron-withdrawing nitro group (making 6 false); and all 8 compounds contain active hydrogen to release H₂ gas with Na metal (making 7 false).
