QJEEM03Chbac4: JEE Main 2003 Chemistry - Class 12 JEEM03Chbac4 Solution: A red solid is insolvable in water. However it becomes soluble…

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QJEEM03Chbac4: JEE Main 2003 Chemistry - Class 12 JEEM03Chbac4 Solution: A red solid is insolvable in water. However it becomes soluble…

A red solid is insolvable in water. However it becomes soluble if some

K I

is added to water. Heating the red solid in a test tube results in liberation of some violet colored fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is :

Multiple Choice Options

A HgI2
B HgO
C Pb3O4
D (NH4)2Cr2O7

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Accepted Answer

When

K I

is added to mercuric iodide it dissolve in it and form complex.

\underset{r e d, s o l i d (i n s o lub l e)}{H g I_{2}} + K I \to \underset{(s o l u b l e)}{K_{2} [H g I_{4}]}

On heating

H g I_{2}

decomposes as

H g I_{2} H g ⇌ + \underset{(v i o l e t v a p o u r s)}{I_{2}}

QJEEM03Chbac4: JEE Main 2003 Chemistry - Class 12 JEEM03Chbac4 Solution: A red solid is insolvable in water. However it becomes soluble…

Multiple Choice Options

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