Chemistry For Class IX (New Book ) - Chapter No. 6 - Solutions - Multiple Choice Questions And Fill In The Blanks

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Chapter No.6 - Solutions
MCQs And Fill In The Blanks
Text Book Exercise

SECTION- A: MULTIPLE CHOICE QUESTIONS
Tick Mark (✓) the correct answer

1. An alloy is the homogeneous mixture of:
(a) two solid ✓
(b) two liquid
(c) two gases
(d) solid and liquid

2. A saturated solution of KCl on heating becomes:
(a) unsaturated
(b) supersaturated ✓
(c) diluted
(d) all of these

3. If we dissolve sand into the water, then the mixture is said to be:
(a) solution
(b) suspension ✓
(c) colloids
(d) concentrated solution

4. Solubility is usually expressed in grams of the solute dissolved in ________gram of a solvent.
(a) 10 grams
(b) 100 grams ✓
(b) 500 grams
(d) 1000 grams

5. Example of heterogeneous mixture is:
(a) sugar and water
(b) sand and water ✓
(c ) salt and water
(d) ink and water

6. 2 moles of sodium chloride (NaCl) is equal to:
(a) 123 grams
(b) 135 grams
(c) 158 grams
(d) 117 grams ✓

7. Molarity of a solution which is prepared by dissolving 40 g sodium chloride in 500 cm³ of solution is:
(a) 1.4 M ✓
(b) 1.5 M
(c) 1.33 M
(d) 1.33 M

8. 10% (w/w) sugar solution mean that 10 grams of solute dissolved in:
(a) 90g of water ✓
(b) 95g of water
(c) 100g of water
(d) 105g of water

9. An example of true solution is:
(a) solution of starch
(b) solution of soap
(c) ink in water ✓
(d) tooth paste

10. Which solution contain more water:
(a) 1.0 M
(b) 0.75 M
(c) 0.5 M
(d) 0.25 M ✓

11. When a saturated solution is diluted, it change into:
(a) saturated solution
(b) unsaturated solution ✓
(c) concentrated solution
(d) supersaturated solution

12. Butter is example of solution:
(a) gas-liquid
(b) solid-liquid
(c) liquid-solid ✓
(d) gas-solid

13. A solution that contain solid solute into liquid solvent is called:
(a) solids in gas
(b) liquids in solids
(c) solids in solids
(d) solids in liquid ✓

14. What is the particle size in suspension?
(a) 10³ nm
(b) 10² nm
(c) less than 10³nm
(d) greater than 10³ nm ✓

15. Write the example of each type of solution.

Solute	Solvent	Example
Solid	Liquid	Salt in water, Sugar in water
Gas	Gas	Air, mixture of hydrogen and helium in water balloon, oxygen in air
Solid	Solid	Brass an alloy (Zinc dissolved in copper), Bronze (tin dissolved in copper )
Liquid	Solid	Amalgam, butter, cheese
Liquid	Gas	Fog( water vapour in air,) liquid air pollutants
Liquid	Liquid	Alcohol dissolve sin water, oil in ether.