Identify the incorrect statement from the following :
The largest and the smallest species among $\mathrm{Mg}, \mathrm{Mg}^{2+}, \mathrm{Al}$ and $\mathrm{Al}^{3+}$ are Al and $\mathrm{Mg}^{2+}$ respectively.
The IUPAC name of the element with atomic number 107 is Unnilseptium.
The similarity in behaviour of Li with Mg is referred to as 'diagonal relationship'
The oxidation state and covalency of Al in $\left[\mathrm{AlCl}\left(\mathrm{H}_2 \mathrm{O}\right)_5\right]^{2+}$ are 3 and 6, respectively.
Mixture of chloroform and acetone forms a solution with negative deviation from Raoult's law due to :
Increase in escaping tendency of molecules of each component.
Formation of hydrogen bonding between acetone and chloroform
Stronger intermolecular forces between chloroform molecules than those between chloroform and acetone molecules.
Repulsive forces.
The number of chlorine atoms present in the organic products $X$ and $Y$ of the following reactions, respectively, are :

3 and 3
6 and 3
6 and 6
3 and 6
The speed of light in vacuum is taken as unity. If light takes 6 min 40 s to reach the Earth from the Sun, the distance between the Sun and the Earth in new unit is:
$3 \times 10^8$
500
$3 \times 10^{10}$
400
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