Class 12

15. Solutions question bank (Chemistry)

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Q1.

A 0.0020 m aqueous solution of an ionic compound \([Co(NH_3)_5(NO_2)]Cl\) freezes at -0.00732°C. Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be (K_f = 1.86°C m\(^{-1}\)) :

(A)
1
(B)
2
(C)
3
(D)
4
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Q2.

An aqueous solution of KI is 1.00 molal. Which change will cause an increase in the vapour pressure of the solution?

(A)
Addition of water
(B)
Addition of NaCl
(C)
Addition of Na₂SO₄
(D)
Addition of 100 molal KI
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