P Block Elements

The correct answer is option (B): H₂SO₅ and H₂S₂O₈
Peroxoacids of sulfur are inorganic acids that have both peroxy and acidic functional groups. They are formed by the combination of hydrogen peroxide with oxoacids of sulfur. The two peroxosulfhuric acids are Peroxomonosulphuric Acid: Which has the chemical formula of H₂SO₅. It is a strong oxidizing acid also called Caro’s Acid. Peroxodisulfuric acid (H₂S₂O₈): It is also known as Marshall’s acid and is a powerful oxidizing and dehydrating acid. They are both highly reactive.

The correct answer is option (A): Ammonium dichromate
Ammonium dichromate can give pure nitrogen on thermal decomposition. The chemical reaction for the same is
(NH₄)₂Cr₂O₇ (s) → Cr₂O₃(s) + N₂(g)+4H₂O
This is an exothermic reaction and it causes rapid evolution of gas and resembles a volcanic eruption.