Which of the following exists as a cyclic trimer in its solid state?

Which of the following reactions is $NOT$ given by $SO_2$?

Oxygen is not evolved on reaction of ozone with

What is the product formed when $PCl_5$ reacts with concentrated $H_2SO_4$?

The bond dissociation energy of the $E-H$ bond in the $H_2E$ hydrides of group $16$ elements (where $E = O, S, Se, Te$) follows which order?

Ozone,when reacts with potassium iodide solution,liberates a certain product which turns starch paper blue. The liberated substance is......