• # question_answer A deliquescent white crystalline hydroxide X reacts with a nitrate Y to form another hydroxide which decomposes to give a insoluble brown layer of its oxide. X is a powerful cautery and breaks down the proteins of skin flesh to a pasty mass. X and Y are A)  $NaOH,AgN{{O}_{3}}$   B)  $NaOH,Zn{{(N{{O}_{3}})}_{2}}$C)  $NaOH,Al{{(N{{O}_{3}})}_{3}}$  D)  $Ca{{(OH)}_{2}},\,HgN{{O}_{3}}$

$\underset{Deliquescent}{\mathop{NaOH}}\,+\underset{(Y)}{\mathop{AgN{{O}_{3}}}}\,\xrightarrow[{}]{}\underset{unstable}{\mathop{AgOH}}\,+NaN{{O}_{3}}$ White crystal $2AgOH\xrightarrow{{}}\underset{brown}{\mathop{A{{g}_{2}}O}}\,+{{H}_{2}}O$ (X) is a powerful cautery and breaks down the proteins of skin flesh to a pasty mass i.e. X is caustic soda.