MCQ
Which of the following has zero dipole moment
- A$C{H_2}C{l_2}$
- ✓$C{H_4}$
- C$N{H_3}$
- D$P{H_3}$
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$(A)$ Hydrated $Al _2 O _3$ precipitates, when $CO _2$ is bubbled through a solution of sodium aluminate.
$(B)$ Addition of $Na _3 AlF _6$ lowers the melting point of alumina.
$(C)$ $CO _2$ is evolved at the anode during electrolysis.
$(D)$ The cathode is a steel vessel with a lining of carbon.
$PC{l_5}(g) \rightleftharpoons PC{l_3}(g) + C{l_2}(g)$ is