MCQ
Identify the correct option
- A$V_2O_5$ reacts with alkalies as well as acids
- BIn Misch metal $S, C, Ca$ and $Al$ present in traces amount with $Ce$
- C$2C{u^ + }\xrightarrow{{aq.}}C{u^ + }^2 + Cu$
- ✓All of the above are correct
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Reason $R:$ The increasing nuclear charge outweighs the shielding across the period.
In the light of the above statements, choose the most appropriate from the options given below:
(nearest integer)
[Given : Molar mass of $\mathrm{AB}_2=200 \mathrm{~g} \mathrm{~mol}^{-1} \cdot \mathrm{K}_{\mathrm{b}}$
(molal boiling point elevation const. of water)
$=0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$, boiling point of water $=100^{\circ} \mathrm{C}$;
$\mathrm{AB}_2$ ionises as $\left.\mathrm{AB}_2 \rightarrow \mathrm{A}^{2+}+2 \mathrm{~B}^{-}\right]$
The above reaction is classified as