Chemistry Chapter 9 Solutions and Colloids Mcqs Test Online Class 11th Punjab

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Question 1 of 12

Chemistry

1. All solutions containing 1g of non-volatile solutes will have

Same vapour pressure

All of a, b, c

Same freezing point

Same boiling point

Question 1 of 12

Question 2 of 12

2. Molarity of glucose solution when 9g of it is dissolved in 250 cm³ of solution is

None of these

0.5M

0.2M

0.25M

Question 2 of 12

Question 3 of 12

3. Which of the following W/W solutions has the lowest freezing point?

18% glucose

6% urea

34.2% sucorose

9% glucose

Question 3 of 12

Question 4 of 12

4. Sea water has about 6 ppm dissolved oxygen. What mass of dissolved oxygen is present in one kg of sea water

6g

6 x 10⁻³mg

6 x 10⁻³g

6 x 10⁻³kg

Question 4 of 12

Question 5 of 12

5. 100g of a 10% (W/W) NaOH contains 10g of NaOH in

100g solution

110g of H₂O

100g of H₂O

10g of H₂O

Question 5 of 12

Question 6 of 12

6. Which of the following is volatile

Sucrose

Urea

Water

Glucose

Question 6 of 12

Question 7 of 12

7. 18g glucose is dissolved in 180g of water. The relative lowering of vapour pressure is:

1.8

1

0.001

0.01

Question 7 of 12

Question 8 of 12

8. The solubility of a substance decreases with increase in temperature if heat of solution is:

Cannot be predicted

Positive

Negative

Zero

Question 8 of 12

Question 9 of 12

9. Molarity of pure water is

1.8

55.5

18

1

Question 9 of 12

Question 10 of 12

10. A solution of urea (Mol.Wt=60) is 10% (W/V). the volume in which 1 mole of it is dissolved will be

6dm³

0.6dm³

60cm³

0.54 dm³

Question 10 of 12

Question 11 of 12

11. Which of the following is not true of a colloid.

Can pass through ultra filter paper

Its particles cannot be seen under ordinary microscope

It is heterogeneous

Scatter light

Question 11 of 12

Question 12 of 12

12. Aerosol are colloids which contain
(a) A Solid dispersed in a liquid
(b) A solid dispersed in a gas
(c) A liquid dispersed in a gas
(d) A liquid in another liquid

b, c

c, d

a, b

a

Question 12 of 12

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