MCQ
The basic structural unit of silicates is
- A$SiO_3^{2-}$
- B$SiO_4^{2-}$
- C$SiO^-$
- ✓$SiO_4^{-4}$

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$HCl_{ ( g )}$ are $-105,-242,-394$ and $-92\,kJ\,mol ^{-1}$
respectively. The magnitude of enthalpy of the reaction given below is $......kJ\,mol ^{-1}$
(nearest integer) $CCl _{4( g )}+2 H _2 O_{( g )} \rightarrow CO _{2( g )}+4 HCl_{( g )}$