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 m

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

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Answer:

A

Solution:

$(insoluble) HgI_{2} + KI \to (soluble) K_{2} HgI_{4}$ On heating $HgI_{2}$ decomposes as $HgI_{2} ⇌ Hg + I_{2}$

TestHub · Accepted Answer

(insoluble) HgI 2 ​ ​ + KI → (soluble) K 2 ​ HgI 4 ​ ​ On heating HgI 2 ​ decomposes as HgI 2 ​ ⇌ Hg + I 2 ​

Chemistry - Complete d-block Question with Solution | TestHub

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