$Al^{3+} +3 e^- = Al$
Aluminium requires 3 times the amount of electricity to deposit one mole
Moles of $K$ deposited $=19.5 / 39=0.5$
Moles of $Al$ deposited $=0.5 / 3=1 / 6$
Mass of $Al$ deposited $=27 \times 1 / 6$
$=4.5 g$
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| List $I$ (Compound) | List $II$ (Shape/geometry) |
| $A$. $\mathrm{NH}_3$ | $I$. Trigonal Pyramidal |
| $B$. $\mathrm{BrF}_5$ | $II$. Square Planar |
| $C$. $\mathrm{XeF}_4$ | $III$. Octahedral |
| $D$. $\mathrm{SF}_6$ | $IV$. Square Pyramidal |
Choose the correct answer from the options given below:
$\mathop {^ \oplus C{H_2} - CH = CH - CH = N{H_3}}\limits_{(III)} $
Which of these structures is not a valid canonical structure ?
$\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-{ }^{\oplus} \mathrm{NH}_3 ;{ }^{\oplus} \mathrm{CH}_2-\mathrm{CH}=$