MCQ
Which of the following relation is correct ?
- A$\Delta H_f^o (H_2O, l) = \Delta H_c^o (H_2, g)$
- B$\Delta H_f^o (CO_2, g) = \Delta H_c^o (C, graphite)$
- C$\Delta H_c^o (CO, g) = \Delta H_c^o(C, graphite) -\Delta H_f^o(CO, g)$
- ✓All of the above
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$(a)$ Electron density in the $XY$ plane in $3d_x^2 - 3d_y^2$ orbital is zero
$(b)$ Electron density in the $XY$ plane in $3d_z^2$ orbital is zero
$(c)$ $2s$ orbital has one nodal surface
$(d)$ For $2pz$ orbital $YZ$ is the nodal plane.
Specify True or False.