MCQ
Which of the following element has maximum first ionisation potential
- A$V$
- B$Ti$
- C$Cr$
- ✓$Mn$
I.E. increase in a period from $L \to R$
hence, manganese has maximum first ionisation potential.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$2 \mathrm{~K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+8 \mathrm{H}_{2} \mathrm{SO}_{4}+3 \mathrm{C}_{2} \mathrm{H}_{6} \mathrm{O} \rightarrow 2 \mathrm{Cr}_{2}\left(\mathrm{SO}_{4}\right)_{3}+$
$3 \mathrm{C}_{2} \mathrm{H}_{4} \mathrm{O}_{2}+2 \mathrm{~K}_{2} \mathrm{SO}_{4}+11 \mathrm{H}_{2} \mathrm{O}$
If the rate of appearance of $\mathrm{Cr}_{2}\left(\mathrm{SO}_{4}\right)_{3}$ is $2.67 \,\mathrm{~mol}$ $\min ^{-1}$ at a particular time, the rate of disappearance of $\mathrm{C}_{2} \mathrm{H}_{6} \mathrm{O}$ at the same time is ...... $\mathrm{mol}\, \mathrm{min}^{-1}$ (Nearest integer)
$(A)$ 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.