AktiraAktira JEE
ChemistryJEE Main 21 Jan 2026, Shift 2·Q20·MCQ·Easy

Practical / Qualitative Analysis · Chromyl chloride test

On heating a mixture of common salt and KX2CrX2OX7\ce{K2Cr2O7} in equal amount along with concentrated HX2SOX4\ce{H2SO4} in a test tube, a gas is evolved. Formula of the gas evolved and oxidation state of the central metal atom in the gas respectively are :
  1. (1)CrOX2ClX2\ce{CrO2Cl2} and +5+5
  2. (2)CrOX2ClX2\ce{CrO2Cl2} and +6+6
  3. (3)CrX2OX2ClX2\ce{Cr2O2Cl2} and +6+6
  4. (4)CrX2OX2ClX2\ce{Cr2O2Cl2} and +3+3

Video solution coming soon

We're animating every PYQ step by step. Subscribe to get them first.

Subscribe

See the full 21 Jan 2026, Shift 2 paper