Exams › JEE Main › Chemistry

Acidified chromic acid reacts with H2O2 in the presence of an organic solvent to give a blue-coloured product X together with Y. Identify X and Y.

1. CrO5 and H2O
2. Cr2O3 and H2O
3. CrO2 and H2O
4. CrO and H2O

Correct answer: CrO5 and H2O

Solution

Acidified dichromate/chromic acid with hydrogen peroxide gives the deep-blue chromium peroxide CrO5 (CrO(O2)2) plus water; the organic solvent stabilizes the blue colour.

Related JEE Main Chemistry questions

• A transition metal M gives a volatile chloride whose vapour density is 94.8. If this chloride contains 74.75% chlorine by mass, what is the formula of the metal chloride?
• What is the ratio of the magnetic moments of Fe(III) and Co(II)?
• Which of the following species contains the greatest number of unpaired electrons?
• Which of the following species contains an atom in the +6 oxidation state?
• Which of the following pairs contains compounds in which the metal in each case is present in its maximum possible oxidation state?
• Among the following metal oxides, which one exhibits antiferromagnetic behavior?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →