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A red solid is insoluble in water. Howev...

A red solid is insoluble in water. However, it becomes soluble if some KI is added to water. Heating rod solid in a test tube produces violet coloured fumes and droplets of metal appear on the cooler parts of test tube. The red solid is

A

`Pb_(3)O_(4)`

B

`HgI_(2)`

C

`HgO`

D

`(NH_(4))_(2)Cr_(2)O_(7)`

Text Solution

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The correct Answer is:
B
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