MCQ
Benzene hexachloride is
- ✓$1, 2, 3, 4, 5, 6-$ hexachlorocyclohexane
- B$1, 1, 1, 6, 6, 6$ -hexachlorocyclohexane
- C$1, 6-$ phenyl $-1, 6$ -chlorohexane
- D$1, 1$ -phenyl- $6, 6$ -chlorohexane
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$(I)$ $AgNO_3$ $(II)$ $CaCO_3$
$(III)$ $Pb(NO_3)_2$ $(IV)$ $Na_2CO_3$
$($ given $=$ Atomic number of $\mathrm{Ni}: 28)$
(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 $\left.\mathrm{AB}_2 \rightarrow \mathrm{A}^{2+}+2 \mathrm{~B}^{-}\right]$