MCQ
The defination of $pH$ is
- ✓$pH = \log \frac{1}{{[{H^ + }]}}$
- B$pH = \log \,[{H^ + }]$
- C$pH = - \log \frac{1}{{[{H^ + }]}}$
- D$pH = - {\log ^{[{H^ + }]}}$
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$I ^{-}+ ClO _3^{-}+ H _2 SO _4 \longrightarrow Cl ^{-}+ HSO _4^{-}+ I _2$
The correct statement(s) in the balanced equation is/are:
$(A)$ Stoichiometric coefficient of $HSO _4^{-}$is 6 .
$(B)$ lodide is oxidized.
$(C)$ Sulphur is reduced.
$(D)$ $H _2 O$ is one of the products.

$(I)\, SF_4$ $(II)\, OSF_4$ $(III)\, H_2CSF_4$

($en=$ ethylenediamine)