A red solid is insoluble in water. However it becomes soluble if some KI is added to…
Chemistry · NEET · NTA Exams — d- and f- Block Elements
A red solid is insoluble in water. However it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is:
- (NH4)2Cr2O7
- HgI2
- HgO
- Pb3O4
Answer
(B) HgI 2
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