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Chapter No.6 - Solutions
MCQs And Fill In The Blanks
Text Book Exercise
SECTION- A: MULTIPLE CHOICE QUESTIONSTick 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. |
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