What is the number of unpaired electrons in $\mathrm{C}_0$ in +2 state?
1
3
4
5
Which from following is essential amino acid?
Valine
Proline
Tyrosine
Alanine
For the reaction
$$ \mathrm{N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{NH}_{3(\mathrm{~g})} $$
$\mathrm{N}_{2(\mathrm{~g})}$ disappears at the rate of $2 \times 10^{-4} \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}$. Find the rate of $\mathrm{NH}_3$ formation.
$4 \times 10^{-4} \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}$
$1.5 \times 10^{-4} \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}$
$2.0 \times 10^{-4} \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}$
$2.5 \times 10^{-4} \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}$
Which from following quantity of different gases contains maximum number of molecules?
$7 \mathrm{~g} \mathrm{~N}_2$
$2 \mathrm{~g} \mathrm{H}_2$
$8 \mathrm{~g} \mathrm{O}_2$
$20 \mathrm{~g} \mathrm{NO}_2$
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