MCQ
When copper is heated with conc. $HNO_3$ it produces
- A$Cu(NO_3)_2, NO$ and $NO_2$
- B$Cu(NO_3)_2$ and $N_2O$
- ✓$Cu(NO_3)_2$ and $NO_2$
- D$Cu(NO_3)_2$ and $NO$
$\mathrm{Cu}+4 \mathrm{HNO}_{3} \longrightarrow \mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{NO}_{2}$
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$(A)$ the concentration of the reactant decreases exponentially with time.
$(B)$ the half-life of the reaction decreases with increasing temperature.
$(C)$ the half-life of the reaction depends on the initial concentration of the reactant
$(D)$ the reaction proceeds to $99.6 \%$ completion in eight half-life duration.
