The final acid obtained during the manufacture of $H_2SO_4$ by the contact process is

When sulphur is boiled with $Na_2SO_3$,a compound $(A)$ is produced. $(A)$ on reaction with excess $AgNO_3$ solution gives a compound $(B)$,which after dissolving in water produces a black coloured sulphide $(C)$. Identify the compound $(A)$,$(B)$ and $(C)$.

Which is the most stable crystalline form of sulfur at room temperature?

Which of the following statements regarding sulphur is incorrect?

How does $SO_2$ gas behave when it is moist?

Explain why ozone $(O_3)$ is thermodynamically less stable than oxygen $(O_2)$?