1.

When mercuric iodide is added to the aqueous solution of potassium iodide, then:

Answer»

FREEZING POINT is raised
freezing point is lowered
freezing point does not change
boiling point does not change

Solution :KI REACTS with `HgI_(2)` to form a complex as
`2KI+HgI_(2)rarrK_(2)[HgI_(4)]overset("ionizes")rarr`
`underset("4 ions")ubrace(2K^(+)+2I^(-))""underset("3 ions")ubrace(2K^(+)+HgI_(4)^(2-))`
Thus, NUMBER of ions decreases in the solution. Hence depression in freezing point is LESS, i.e., actual freezing point is raised.


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