MCQ
he substance on whose surface adsorption takes place is called an $.......$
- ✓Absorbent.
- BAbsorbate.
- CSolute.
- DSolvent.
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$A$. They exhibit high enthalpy of atomization as the d-subshell is full.
$B$. $\mathrm{Zn}$ and $\mathrm{Cd}$ do not show variable oxidation state while $\mathrm{Hg}$ shows $+\mathrm{I}$ and + $II.$
$C$. Compounds of $\mathrm{Zn}, \mathrm{Cd}$ and $\mathrm{Hg}$ are paramagnetic in nature.
$D$. $\mathrm{Zn}, \mathrm{Cd}$ and $\mathrm{Hg}$ are called soft metals.
Choose the most appropriate from the options given below:


$Zn^{2 + }(aq.) + 2e⇔ Zn(s)$; $→$ $ -0.762$
$Cr^{3 + }(aq) + 3e ⇔ Cr(s)$; $→$ $-0.740$
$2H^ +(aq) + 2e⇔ {H_2}(g)$; $→$ $0.00$
$Fe^{3+}(aq) + e ⇔ Fe^{2+}(aq)$; $→$ $0.770$
Which is the strongest reducing agent