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

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Question 1 of 12

Chemistry

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

0.5M

0.25M

None of these

0.2M

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

a, b

a

c, d

b, c

Question 2 of 12

Question 3 of 12

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

9% glucose

6% urea

34.2% sucorose

18% 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

6 x 10⁻³kg

6 x 10⁻³g

6g

6 x 10⁻³mg

Question 4 of 12

Question 5 of 12

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

Same boiling point

Same freezing point

All of a, b, c

Same vapour pressure

Question 5 of 12

Question 6 of 12

6. 100g of a 10% (W/W) NaOH contains 10g of NaOH in

100g of H₂O

110g of H₂O

100g solution

10g of H₂O

Question 6 of 12

Question 7 of 12

7. Molarity of pure water is

1.8

18

55.5

1

Question 7 of 12

Question 8 of 12

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

Can pass through ultra filter paper

It is heterogeneous

Its particles cannot be seen under ordinary microscope

Scatter light

Question 8 of 12

Question 9 of 12

9. 18g glucose is dissolved in 180g of water. The relative lowering of vapour pressure is:

1.8

0.01

0.001

1

Question 9 of 12

Question 10 of 12

10. Which of the following is volatile

Urea

Sucrose

Glucose

Water

Question 10 of 12

Question 11 of 12

11. 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 11 of 12

Question 12 of 12

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

Negative

Zero

Cannot be predicted

Positive

Question 12 of 12

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