When a small amount of $$KMn{O_4}$$ is added to concentrated $${H_2}S{O_4},$$ a green oily compound is obtained which is highly explosive in nature. Compound may be :
A.
$$MnS{O_4}$$
B.
$$M{n_2}{O_7}$$
C.
$$Mn{O_2}$$
D.
$$M{n_2}{O_3}$$
Answer :
$$M{n_2}{O_7}$$
Solution :
$$KMn{O_4}$$ reacts with $${H_2}S{O_4}$$ to form $$M{n_2}{O_7}$$ which is highly explosive substance.
$$2KMn{O_4} + {H_2}S{O_4} \to {K_2}S{O_4} + M{n_2}{O_7} + {H_2}O$$
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