MCQ
Formulae for Nessler's reagent is:
- A$KHg _2 I _2$
- B$KHgI _3$
- ✓$K _2 Hg _4$
- D$HgI _2$
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$(a)$ Benzene
$(b)$ Toluene
$(c)$ Chlorobenzene and
$(d)$ Phenol
${H_2}(g) + {I_2}(g) \rightleftharpoons 2HI(g)$
is $32$ at a given temperature. The equilibrium concentrations of $I_2$ and $HI$ are $0.5 \times 10^{-3}\, M$ and $8 \times 10^{-3}\, M$ respectively. the equilibrium concentration of $H_2$ is

$3p_x, 2s, 4d_{xy}, 3s, 4p_z, 3p_y, 4s$