MCQ
The $CORRECT$ ionisation energy order is
- ✓$Zn^+ > Ca^+ > Cr^+$
- B$Co^{2+} > Mn^{2+} > Cr^{2+}$
- C$Mn^{2+} > Ni^{2+} > Ca^{2+}$
- D$Zn^+ > Cu^+ > Ni^+$
$\mathrm{Ca}=[\mathrm{Ar}] 4 \mathrm{s}^{2} \Rightarrow \mathrm{Ca}^{+} \Rightarrow[\mathrm{Ar}] 4 \mathrm{s}^{1}$
$\mathrm{Cr}=[\mathrm{Ar}] 3 \mathrm{d}^{5} 4 \mathrm{s}^{1} \Rightarrow \mathrm{Cr}^{+} \Rightarrow[\mathrm{Ar}] 3 \mathrm{d}^{5}$
$\mathrm{Cu}=[\mathrm{Ar}] 3 \mathrm{d}^{10} 4 \mathrm{s}^{1} \Rightarrow \mathrm{Cu}^{+} \Rightarrow[\mathrm{Ar}] 3 \mathrm{d}^{10}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
${A_{2\left( g \right)}} \longrightarrow {B_{\left( g \right)}} + \frac{1}{2}\,{C_{\left( g \right)}}$ the increase in pressure from $100\, mm$ to $120\, mm$ is noticed in $5\,\min$. The rate of dissappearence of $A_2$ in $mm\, min^{-1}$ is
[Given : mass of electron $=9.1 \times 10^{-31} \mathrm{~kg}$, Plank's constant $(\mathrm{h})=6.626 \times 10^{-34} \mathrm{JS}$ ]
(Value of $\pi=3.14$ )