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# $Cu+H_2\quad\underrightarrow {heat}\quad Cu+x$,$ZnO+y\quad\underrightarrow{heat} \quad Zn+H_2O$,$2AgCl+H_2\rightarrow z+w$.The $x$ is

$\begin{array}{1 1}(a)\;H_2\\(b)\;H_2O\\(c)\;2H_2O\\(d)\;2H_2\end{array}$

Can you answer this question?

$Cu+H_2\quad\underrightarrow {heat}\quad Cu+H_2O$
Hence $x$ is $H_2O$
Hence (b) is the correct answer.
answered Jan 24, 2014