MCQ
Identify the incorrect pair from the following :
- ✓Fluorspar- $BF _3$
- BCryolite- $Na _3 AlF _6$
- CFluoroapatite- $3 Ca _3\left( PO _4\right)_2 \cdot CaF _2$
- DCarnallite- $KCl \cdot MgCl _2 \cdot 6 H _2 O$
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Reason : Oxidation takes place at anode and reduction at cathode.
The correct statement for the ionic radius of $\mathrm{N}^{3-}$ from the following is :
(Molar Mass : Bromine $=80\; g / mol$ )