MCQ
Crystals of which pair are isomorphous
- A$ZnS{O_4},$ $SnS{O_4}$
- B$MgS{O_4},$ $CaS{O_4}$
- ✓$ZnS{O_4},$ $MgS{O_4}$
- D$PbS{O_4},$ $NiS{O_4}$
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Assertion $A$ :Magnesium can reduce $Al _{2} O _{3}$ at a temperature below $1350^{\circ} C$, while above $1350^{\circ} C$ aluminium can reduce $MgO$.
Reason $R$ : The melting and boiling points of magnesium are lower than those of aluminium.
In light of the above statements. choose most appropriate answer from the options given below