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?
$7 \mathrm{~g} \mathrm{~N}_2$
$2 \mathrm{~g} \mathrm{H}_2$
$8 \mathrm{~g} \mathrm{O}_2$
$20 \mathrm{~g} \mathrm{NO}_2$
If for the cell reaction,
$$ \mathrm{A}_{(\mathrm{s})}+\mathrm{B}_{(\mathrm{aq})}^{+} \longrightarrow \mathrm{A}_{(\mathrm{aq})}^{+}+\mathrm{B}_{(\mathrm{s})} $$
if $\mathrm{E}_{\text {cell }}^{\circ}=0.0592 \mathrm{~V}$. What is equilibrium constant of reaction at 298 K ?
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