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A 0.0020 m aqueous solution of an ionic ...

A 0.0020 m aqueous solution of an ionic compound `Co(NH_(3))_(5) (NO_(2))Cl` freezes at `-0.00744^(@)C`. The number of moles of ions which 1 mole of ionic compound produces on being dissolve in water is `(K_(f)=-1.86^(@)C//m)`

A

2

B

3

C

4

D

1

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaT_(f)=ixxk_(f)xxm`
`i=(DeltaT_(f))/(k_(f)xxm)=(0.00732)/(1.86xx0.002)=2`.
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