A red solid is insoluble in water but soluble in the presence of KI. Heating the red solid in a test tube result in the formation of yellow sublimate in the part of the test tube. The red solid is:

Question

Prashant Kotian · Accepted Answer

Correct answer: B. HgI2 is a red solid, insoluble in water, but soluble in KI forming K2[HgI4]. On heating, red HgI2 converts to yellow HgI2 (phase transition/sublimation).

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