MCQ
A $3p$ orbital has
- ATwo spherical nodes
- BTwo non-spherical nodes
- ✓One spherical and one non-spherical nodes
- DOne spherical and two non-spherical nodes
Number of spherical node $=n-1-1$
Number of non-spherical node $=1$
For $3 p$ subshell, $n=3$ and $l=1$
$\therefore$ The number of spherical node $= n -l-1=3-1-1=1$
and the number of non-spherical node $=l=1$.
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$CH_4(g) +2O_2(g) \rightarrow CO_2(g)+2H_2O(l)\,;$ $\Delta H= -890 \,kJ$
$CO_2(g) \rightarrow C($graphite$) + O_2(g) \,;$ $\Delta H= 393 \,kJ$
$2H_2O(l) \rightarrow 2H_2(g) + O_2(g) \,;$ $\Delta H= 571 \,kJ$
$2H_2(g) \rightarrow 4H(g)\, ;$ $\Delta H= 871\, kJ$
$C($graphite$) \rightarrow C(g)\, ;$ $\Delta H= 716\, kJ$
(Given: Atomic mass of $\mathrm{C}=12, \mathrm{H}=1, \mathrm{O}=16 \mathrm{u}$ )