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To from a supersaturated solution of sal...

To from a supersaturated solution of salt one must:

A

Cool slowly

B

Cool rapidly

C

(c ) Add some salt to cold solution

D

(d) Use a clear vessel

Text Solution

Verified by Experts

The correct Answer is:
B
On rapid cooling, temperature falls rapidaly, crystallisation occurs but slowly. Thus metastable state or supersaturated solution state exist for a short while.
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Knowledge Check

  • When a crystal of a solute is introduced into a supersaturated solution of the solute :

    A
    the solute dissolves
    B
    the solution becomes unsaturated
    C
    the solution remains supersaturated
    D
    the excess of solute crystallises out

  • There are some of the characteristics of the supersaturated solution (P) Equilibrium exists between solution and solid solute. (Q) If a crystal of solute is added to supersaturated solution, crystallisation occurs rapidly ®Supersaturated solutions contain more solute than they should have at a particular temperature. Correct characteristics of supersaturated solutions are:

    A
    P,Q,R
    B
    Q,R
    C
    P,R
    D
    P,Q

  • A supersaturated solution is a metastable state of solution in which solute concentration

    A
    is equal to the solubility of that substance in water
    B
    exceeds its solubility
    C
    less than its solubility
    D
    continuously changes.

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