MCQ
$C{H_2} = CHCl$ reacts with $HCl$ to form
- A$C{H_2}Cl - C{H_2}Cl$
- ✓$C{H_3} - CHC{l_2}$
- C$C{H_2} = CHCl.HCl$
- DNone of these

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$Si_2H_6(g)\,\,+\,\,H_2(g)\,\,\to \,\, 2SiH_4(g),\,\,\Delta H\,\,=\,\,-\,11.7\,\,kJ/mol$
$SiH_4(g)\,\,\to \,\,SiH_2(g)\,\,+\,\,H_2(g),\,\, \Delta H\,\,=\,\,+239.7\,\,kJ/mol$
$\Delta H_f^o\,\,Si_2H_6(g)\,\,=\,\,80.3\,\,kJ/mol$
......$kJ/mol$