Which is the most suitable reagent among the following to distinguish compound (3) from rest of the compounds? ${\rm{i)}}\,\,\,\,C{H_3} - C \equiv C - C{H_3}$ ${\rm{ii)}}\,\,\,\,C{H_3} - C{H_2} - C{H_2} - C{H_3}$ ${\rm{iii)}}\,\,\,\,C{H_3} - C{H_2}C \equiv CH$ ${\rm{iv)}}\,\,\,\,C{H_3} - CH = C{H_2}.$

Bromine in carbon tetrachloride

NEET UG CHEMISTRY MCQ: HYDROCARBONS

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Which is the most suitable reagent among the following to distinguish compound (3) from rest of the compounds?

\mathrm{i)}\,\,\,\,C{H_3} - C \equiv C - C{H_3}

\mathrm{ii)}\,\,\,\,C{H_3} - C{H_2} - C{H_2} - C{H_3}

\mathrm{iii)}\,\,\,\,C{H_3} - C{H_2}C \equiv CH

\mathrm{iv)}\,\,\,\,C{H_3} - CH = C{H_2}.

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Correct option: D

Ammonical silver nitrate

Option D is correct because ammoniacal silver nitrate reacts specifically with terminal alkynes (like compound iii) to form a precipitate, while it does not react with internal alkynes, alkanes, or alkenes.

NEET UG CHEMISTRY MCQ: HYDROCARBONS

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