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Properties such as boiling point, freezi...

Properties such as boiling point, freezing point, and vapour pressure of a pure solvent change when solute molecules are added to get homogenous solution. These are called colligative properties.
Anwer the following questions:
i.`0.001 m NaCl`
ii.0.001 m urea
iii.`0.001 m MgCl_(2)`
iv.`0.001 m CH_(3)COOH`
Increasing order of boiling points

A

`(ii) lt (iv) lt (i) lt (iii)`

B

`(iv) lt (i) lt (ii) lt (iii)`

C

`(iii) lt (ii) lt (i) lt (iiv)`

D

`(i) lt (ii) lt (iii) lt (iv)`

Text Solution

Verified by Experts

The correct Answer is:
A
Boiling point is higher if `DeltaT_(b)` is higher which in turn depends on `m_("effective") (=im_("effective")`.
`:.` 0.001 m urea `lt` 0.001 m `CH_(3)COOH lt 0.001 m NaCl lt 0.001 m MgCl_(2)`
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