Question

83. A non-volatile solute is dissolved in water to
prepare 1 molal solution. Relative lowering of
vapour pressure of the solvent would be
(1) 0.0115
(2) 0.0176
(3) 0.023
(4) 0.0158​

Answer 1

Answer:

(2)

Explanation:

∆p/p=X of solute

where, x is mole fraction

1 molal means 1 mole solute in 1 kg solvent

∆p/p=(1)/1+(1000/18)

=1/56.5

=0.01769

Answer 2

Answer:

• obation b correct sister and broters