MCQ
One $\text{a.m.u}$ is defined as mass of :
- A$\frac{1}{16}^{\text{th}}$ mass of one oxygen atom
- B$\frac{1}{14}^{\text{th}}$ mass of one atom of nitrogen
- ✓$\frac{1}{12}^{\text{th}}$ mass of one carbon $-12$ atom
- DNone of above
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$2AB_{2(g)} \rightleftharpoons 2AB_{(g)} + B_{2(g)}$
The degree of dissociation is $x$ and is small compared to $1.$ The expression relating the degree of dissociation $(x)$ with equilibrium constant $K_P$ and total pressure $P$ is
$PCl _{5}, BrF _{5}, \& IF _{7}, BrF _{5} \& IF _{7}$
$(A)$ All are isoelectronic
$(B)$ All have the same nuclear charge
$(C)$ $\mathrm{O}^{2-}$ has the largest ionic radii
$(D)$ $\mathrm{Mg}^{2+}$ has the smallest ionic radii
Choose the most appropriate answer from the options given below :