A red solide is insoluble in water. However it becomes soluble if some KI is added to water. On heating the red solid in a test tube, there is liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is :

A red solide is insoluble in water. However it becomes soluble if some

1.	A red solide is insoluble in water. However it becomes soluble if some KI is added to water. On heating the red solid in a test tube, there is liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is :
Answer» `HgO` `Pb_(3)O_(4)` `(NH_(4))_(2) Cr_(2)O_(7)` `Hgl_(2)` Solution :The red solide is `Hgl_(2)` `underset(("Red solide"))(Hgl_(2)) + 2 KL rarr underset(("soluble"))(K_(2) [Hgl_(4)])` `Hgl_(2) overset("HEAT")rarr underset(("Droplets"))(Hg(l)) + underset(("VIOLET fumes"))(I_(2)(g))`