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The solubility of iodine in water increa...

The solubility of iodine in water increases in the presence of

A

alcohol

B

chloroform

C

sodium hydroxide

D

potassium iodide

Text Solution

Verified by Experts

The correct Answer is:
D
Iodine has the least affinity for water and is only slightly soluble in it. However, it dissolves in `10%aq`. Solution of `KI` due to the formation of a complex ion i.e., `I_(3)^(-)`.
`I_(2)+KI hArr KI_(3)` or `I_(2)+I^(-) hArr I_(3)^(-)` (complex ion)
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Knowledge Check

  • The solubility of iodine in water is increased by

    A
    boiling the solution
    B
    adding `NaNO_3`
    C
    adding HI acid
    D
    addition of potassium iodide

  • The solubility of CO_(2) in water increases with

    A
    Increasing in temperature
    B
    Reduction of gas pressure
    C
    Increasing in gas pressure
    D
    Increasing in volume

  • Solubility of alcohol in water increases with

    A
    increase in molecular mass
    B
    increase in size of alkyl group
    C
    increase in number of hydroxyl groups
    D
    decrease in molecular mass