MolSynapsequestion bank
MolSynapse / Question bank / Qualitative Analysis: Anions / Chromyl chloride, brown ring and ring tests
JEE Advanced levelSingle correct optionDifficulty 3 of 3qa154

Assertion: Chromium keeps its +6 oxidation state in the chromyl chloride test with , whereas with under the same conditions it is reduced to Cr(III). Reason: Iodide is a stronger reducing agent than chloride and is oxidised to by Cr(VI) in concentrated .

  1. ABoth Assertion and Reason are true and the Reason is the correct explanation of the Assertion
  2. BBoth Assertion and Reason are true but the Reason is not the correct explanation of the Assertion
  3. CAssertion is true but Reason is false
  4. DAssertion is false but Reason is true

Answer: A

In the oxidation state of Cr is +6 (two and two ), the same as in dichromate; chloride is not oxidised. Iodide is easily oxidised to , which reduces Cr(VI) to green Cr(III). Both statements are true and the second explains the first.
Practice Qualitative Analysis: Anions More on Chromyl chloride, brown ring and ring tests
Previous questionNext question

More questions on Chromyl chloride, brown ring and ring tests