Single Choice

Following compounds are given (i) $$CH_{3}CH_{2}OH$$ (ii) $$CH_{3}COCH_{3}$$ (iii) $$CH_{3} - \underset {\underset {CH_{3}}{|}}{C}HOH$$ (iv) $$CH_{3}OH$$ Which of the above compound(s) on being warmed with iodine solution and $$NaOH$$, will give iodoform?

A$$(i), (iii)$$ and $$(iv)$$
BOnly $$(ii)$$
C$$(i), (ii)$$ and $$(iii)$$
Correct Answer
D$$(i)$$ and $$(ii)$$

Solution

Compounds having either $$CH_{3}\overset {\overset {O}{\parallel}}{C} -$$ group or $$CH_{3}CH(OH)$$ - group, give iodoform when warmed with $$I_{2}$$ and $$NaOH$$.
Thus, compounds
$$CH_{3}\underset {\underset {H}{|}}{C}HOH, CH_{3} - \overset {\overset {O}{\parallel}}{C} - CH_{3}, CH_{3} - \underset {\underset {CH_{3}}{|}}{C}HOH$$
Given iodoform when heated with $$I_{2}$$ and $$NaOH$$. (Note: $$NaOI$$ oxidises $$CH_{3}CH_{2}OH$$ to $$CH_{3}CHO$$, and gives positive iodoform test.)

SIMILAR QUESTIONS

Haloalkanes and Haloarenes

Which of the following compound(s), on being warmed with iodine solution and $$NaOH$$ gives iodoform test?

Haloalkanes and Haloarenes

Which of the following compounds will give a yellow precipitate with iodine and alkali?

Haloalkanes and Haloarenes

The correct statement with respect to product Y is:

Haloalkanes and Haloarenes

Which of the following compounds will give positive iodoform test ?

Haloalkanes and Haloarenes

Which of the following alcohols is expected to give haloform test?

Haloalkanes and Haloarenes

Give a chemical test to distinguish between the following pairs of compounds.

Haloalkanes and Haloarenes

Give a chemical test to distinguish between the following pairs of compounds.

Haloalkanes and Haloarenes

Distinguish between: Propanol and t-butyl alcohol

Haloalkanes and Haloarenes

Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?

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