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Question : 25
Total: 27
SECTION - D
(a) Give equations of the following reactions:
(i) Phenol is treated with conc.
(ii) Propene is treated with
(iii) Sodium t-butoxide is treated with
(b) How will you distinguish between butan-1-ol and butan-2-ol?
(c) Arrange the following in increasing order of acidity: Phenol, Ethanol, Water
OR
(a) How can you obtain Phenol from (i) Cumene, (ii) Benzene sulphonic acid, (iii) Benzene diazonium chloride?
(b) Write the structure of the major product obtained from dinitration of 3-methylphenol.
(c) Write the reaction involved in Kolbe's reaction.
Solution:
(a) (i)
(ii)Na + O − −
− CH 3 + CH 3 Cl → CH 3 O −
− CH 3 + NaCl
Sodium t-butoxide
(b) Iodoform test: Butan− 2 − ol NaOH CHI 3 NaOH
CH 3 CH 2
CH 3 + 4 I 2 + 6 NaOH →
OH − CH 2 − CH 2 − CH 2 − CH 3 + I 2 + NaOH →
OR
(ii)
(iii)
Sodium t-butoxide
(b) Iodoform test: Butan
OR
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