The correct option is(D): - 2 and - 1.
The reaction involved is \(BaO_2 + H_2SO_4 \rightarrow BaSO_4 + H_2O_2\) The most electronegative atom, oxygen, in \(BaSO_4\) and
\(H_2O_2\) has - 2 and - 1 oxidation state respectively.
Ion having highest hydration enthalpy among the given alkaline earth metal ions is:
Let $ S $ denote the locus of the point of intersection of the pair of lines $$ 4x - 3y = 12\alpha,\quad 4\alpha x + 3\alpha y = 12, $$ where $ \alpha $ varies over the set of non-zero real numbers. Let $ T $ be the tangent to $ S $ passing through the points $ (p, 0) $ and $ (0, q) $, $ q > 0 $, and parallel to the line $ 4x - \frac{3}{\sqrt{2}} y = 0 $.
Then the value of $ pq $ is