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) 1.37 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. Which of the following statements is true?
(a) A solvent is the homogenous mixture of solute and solution.
(b) A solvent is the heterogenous mixture of solute and solution.
(c) A solution is the homogenous mixture of solute and solvent. ✓
(d) A solution is the heterogenous mixture of solute and solvent.

16. Glass of milk, blood and tap water are the examples of:
(a) solution (Colloid) ✓
(b) solute
(c) solvent
(d) None of them

17. The nutrient absorbed by plants from the soil is the example of the:
(a) solvent
(b) solution ✓
(c) Both 'a' & 'b'
(d) None of these

18. Brass is an example of:
(a) solute
(b) solvent
(c) solution (solid) ✓
(d) None of these

19. Brass is:
(a) zinc dissolved in copper ✓
(b) iron dissolved in copper
(c) iron dissolved in zinc
(d) tin dissolved in iron

20. In aqueous solution, water is present in greater amount and termed as:
(a) solution
(b) solvent ✓
(c) solute
(d) None of these

21. The component of a solution which is always present in smaller amount is called the:
(a) solution
(b) solvent
(c) solute ✓
(d) None of these

22. The component of the solution which is present in larger amount is called:
(a) solution
(b) solvent ✓
(c) solute
(d) None of these

23. It is also called as the universal solvent.
(a) Alcohol
(b) Kerosene oil
(c) Mineral oil
(d) Water ✓

24. A solution that cannot dissolve more solute in it at a particular temperature is called a:
(a) saturated solution ✓
(b) unsaturated solution
(c) supersaturated solution
(d) diluted solution

25. A solution that can dissolve more solute than it contained in the saturated solution after heating is called a:
(a) saturated solution
(b) unsaturated solution
(c) supersaturated solution ✓
(d) diluted solution

26. In carbonated drinks, the state of solute is:
(a) gas ✓
(b) liquid
(c) solid
(d) All of these

27. In fog, the state of solvent is:
(a) gas ✓
(b) liquid
(c) solid
(d) All of these

28. Concentration = ____:
(a) mass of solute in gram x volume of solution in dm³
(b) Mass of solute in gram / volume of solution in dm³ ✓
(c) volume of solution in dm³ / Mass of solute in gram
(d) None of these

29. 1 litre = ___:
(a) 1 cm³
(b) 1 ml
(c) 1000 cm³
(d) 1 dm³ ✓

30. Molarity is defined as the number of moles of solute dissolved in:
(a) 1 ml
(b) 1 cm³
(c) 1 dm³ ✓
(d) 1000 cm³

31. Solubility is increased by:
(a) increasing the temperature ✓
(b) decreasing the temperature
(c) leaving the solution for a period of time
(d) All of these

32. 2 moles of water is equal to:
(a) 18 g
(b) 36 g ✓
(c) 56 g
(d) 46 g

33. A solution that contains large amount of dissolved solute is called:
(a) dilute
(b) saturated
(c) supersaturated
(d) concentrated ✓

34. Homogenous mixture of solute and solvent is called:
(a) solvent
(b) solute
(c) solution ✓
(d) suspension

35. The number of ways of representing percent concentration are:
(a) one
(b) two
(c) three
(d) four ✓

36. Solubility is usually expressed in grams of solute per:
(a) 10 grams of solvent
(b) 100 grams of solvent ✓
(c) 1000 grams of solvent
(d) 10000 grams of solvent

37. In colloids, particles are too big to:
(a) dissolve ✓
(b) absorb
(c) crystallize
(d) disappear

38. Suspensions are:
(a) homogenous
(b) heterogeneous ✓
(c) uniform
(d) solutions

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.