Hydrocarbons - Result Question 90
####78. Following statements are true, only under some specific conditions. Write the condition for each subquestion in not more than two sentences :
(i) 2-methyl propene can be converted into isobutyl bromide by hydrogen bromide.
(ii) Ethyne and its derivatives will give white precipitate with ammoniacal silver nitrate solution.
$(1984,1 M \times 2=2 M)$
Show Answer
Solution:
- (i)
In the absence of peroxide, $HBr$ would be added giving tertiary butyl bromide.
(ii) Tertiary alkynes are slightly acidic, forms silver salt with ammoniacal solution of silver nitrate :
$$ R-C \equiv C-H+AgNO _3 \xrightarrow{NH _3(a q)} R-C \equiv CAg \downarrow $$
