MCQ
Which of the following pair of orbitals, the probability of finding the electron is zero in $XY$ plane?
- A$3{d_{yz}},4{d_{{x^2} - {y^2}}}$
- B$2{p_z},3{d_{{z^2}}}$
- ✓$4{p_{zx}},3{p_z}$
- DNone of these

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