In neutral or faintly alkaline medium, thiosulphate is quantitatively oxidized by $$KMn{O_4}$$ to
A.
$$SO_3^{2 - }$$
B.
$$SO_4^{2 - }$$
C.
$$S{O_2}$$
D.
$$SO_5^{2 - }$$
Answer :
$$SO_4^{2 - }$$
Solution :
In neutral or weakly alkaline medium thiosulphate is quantitatively oxidized by $$KMn{O_4}$$ to sulphate. According to this equation, $$8MnO_4^ - + 3{S_2}O_3^{2 - } + {H_2}O \to $$ $$8Mn{O_2} + 6SO_4^{2 - } + 2O{H^ - }$$
Releted MCQ Question on Inorganic Chemistry >> D and F Block Elements
Releted Question 1
When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volume of hydrogen evolved is