d and f-Block ElementsEasy
Question
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
Options
A.HgI2
B.HgO
C.Pb3O4
D.(NH4)2Cr2O7
Solution
HgI2 + KI → K2HgI4
(insoluble) (soluble)
On heating HgI2 decomposes as HgI2 ⇋ Hg + I2
(insoluble) (soluble)
On heating HgI2 decomposes as HgI2 ⇋ Hg + I2
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