When $NH_3$ is passed over heated $CuO$,what is it oxidized to?

The total number of paramagnetic gaseous products formed in all the following reactions $[A + B + C ]$:
$(A)\ NH_4 NO_3 \xrightarrow{\Delta} \text{Products}$
$(B)\ 3 NaNO_2 + 3 H_2 SO_4 \longrightarrow \text{Products}$
$(C)\ Pb(NO_3)_2 \xrightarrow{673 \ K} \text{Products}$

Which of the following is not correct for $N_2O$?

The number of pentagons in $C_{60}$ and trigons (triangles) in white phosphorus,respectively,are

Which of the following is $NOT$ a property of red phosphorus?

The decreasing values of bond angles from $NH_3$ $(106^o)$ to $SbH_3$ $(101^o)$ down group-$15$ of the periodic table is due to