\(C{{H}_{3}}C{{H}_{2}}C\equiv CH+\underbrace{AgN{{O}_{3}}+N{{H}_{4}}OH}_{{}}\to \)
\(\underset{white\,ppt.}{\mathop{C{{H}_{3}}C{{H}_{2}}C\equiv CAg}}\,\downarrow +N{{H}_{4}}N{{O}_{3}}+{{H}_{2}}O\)
$(1)$ $CH_3 - C \equiv C - CH_3$ $(2)$ $CH_3CH_2CH_2CH_3$
$(3)$ $CH_3CH_2C \equiv CH$ $(4)$ $CH_3CH = CH_2$