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

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Question 1 of 12

Chemistry

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

6 x 10⁻³mg

6g

6 x 10⁻³g

6 x 10⁻³kg

Question 1 of 12

Question 2 of 12

2. 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

a

a, b

c, d

Question 2 of 12

Question 3 of 12

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

60cm³

0.6dm³

6dm³

0.54 dm³

Question 3 of 12

Question 4 of 12

4. 18g glucose is dissolved in 180g of water. The relative lowering of vapour pressure is:

1.8

0.01

0.001

1

Question 4 of 12

Question 5 of 12

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

100g solution

10g of H₂O

100g of H₂O

110g of H₂O

Question 5 of 12

Question 6 of 12

6. Molarity of pure water is

1

55.5

1.8

18

Question 6 of 12

Question 7 of 12

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

0.2M

0.25M

0.5M

None of these

Question 7 of 12

Question 8 of 12

8. Which of the following is volatile

Sucrose

Urea

Water

Glucose

Question 8 of 12

Question 9 of 12

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

Scatter light

Its particles cannot be seen under ordinary microscope

It is heterogeneous

Can pass through ultra filter paper

Question 9 of 12

Question 10 of 12

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

34.2% sucorose

9% glucose

18% glucose

6% urea

Question 10 of 12

Question 11 of 12

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

Zero

Negative

Cannot be predicted

Positive

Question 11 of 12

Question 12 of 12

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

All of a, b, c

Same boiling point

Same vapour pressure

Same freezing point

Question 12 of 12

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