question_answer

What will be the heat of formation of methane, if the heat of combustion of carbon is \[CoC{{l}_{2}}\] kJ, heat of formation of water is \[C{{o}^{2+}}=[Ar]3{{d}^{7}}\] kJ and heat of combustion of methane is z kJ?

A)  \[C{{H}_{3}}C{{H}_{2}}C\equiv N\xrightarrow{HCl}{{[C{{H}_{3}}C{{H}_{2}}C\equiv NH]}^{+}}C{{l}^{-}}\]

B)  \[\xrightarrow{SnC{{l}_{2}}/HCl}{{[C{{H}_{3}}-C{{H}_{2}}CH=N{{H}_{2}}]}^{+}}SnCl_{6}^{2-}\]

C)  \[\xrightarrow{{{H}_{2}}O/boil}C{{H}_{3}}C{{H}_{2}}CHO+N{{H}_{4}}Cl\]

D)  \[C{{H}_{3}}Br+NaO-\underset{C{{H}_{3}}}{\mathop{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-C{{H}_{3}}\xrightarrow[-NaBr]{}\underset{t-butyl\,methyl\,ether}{\mathop{C{{H}_{3}}-O-\underset{C{{H}_{3}}}{\mathop{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-C{{H}_{3}}}}\,\]