NEET 2020 Chemistry : Solutions-03(20.11.2019)

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Question 1

A solution contain a non-volatile electrolyte (P) which is present in a solvent (S). The vapour pressure of P is 90% of the vapour pressure of S at the same temperature. Given that, M_P = 0.25M_S, where M_P and M_S are molar masses of P and S respectively. Then the mass ratio of the solvent and solute is:

• A9.25
• B2.25
• C2.9
• D8.7

Question 2

The value of k_b is given by In this relation X is

• Adensity of solution
• B of solvent
• Clatent heat of vaporization
• D

Question 3

Of the following 0.10m aqueous solutions, which one will exhibit the largest freezing point depression ?

• AKCl
• BC₆H₁₂O₆
• CAl₂(SO₄)₃
• DK₂SO₄

Question 4

What would be the osmotic pressure of 0.05 N sucrose solution at 5◦C?

• A1.14 atm
• B1.56 atm
• C2.45 atm
• D1.37 atm

Question 5

Which of the following has maximum freezing point?

• APure water
• B0.1 M NaCl
• C0.01 M NaCl
• D0.5 M NaCl

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