\(C{{H}_{3}}C{{H}_{2}}C\equiv CH+\underbrace{AgN{{O}_{3}}+N{{H}_{4}}OH}_{{}}\to \)
\(\underset{white\,ppt.}{\mathop{C{{H}_{3}}C{{H}_{2}}C\equiv CAg}}\,\downarrow +N{{H}_{4}}N{{O}_{3}}+{{H}_{2}}O\)


ઇથાઇન $\xrightarrow[\begin{smallmatrix}
(2)\,\,excess\,I-\,C{{H}_{2}}\,-\,{{(C{{H}_{2}})}_{2}}-\,C{{H}_{3}} \\
(3)\,\,{{H}^{\oplus }}
\end{smallmatrix}]{(1)\,\,excess\,NaN{{H}_{2}}}$
