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Chemistry Class 9 Chapter 6


Updated: 01 Oct 2023

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Chemistry Class 9 Chapter 6 is about “Solutions”. This article includes topics such as Aqueous Solution, Solute and Solvent, Saturated, Unsaturated and Super Saturated, Types of Solutions such as Gaseous Solutions (Gas in Gas, Gas in Liquid, Gas in Solid), Liquid Solutions (Liquid in Gas, Liquid in Liquid, Liquid in Solid), Solid Solutions (Solid in Gas, Solid in Liquid, Solid in Solid) and also includes other topics like Concentration of Solution, Percentage Composition (Percentage Mass by Mass, Percentage Mass by Volume, Percentage Volume by Mass, Percentage Volume by Volume), Molarity, Solubility (Nature of the Solvent, Nature of the Solute, Pressure, Temperature), Solutions, Colloids and Suspension.

Chemistry Class 9 Chapter 6 Notes

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Chemistry Class 9 Chapter 6 Notes

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Chemistry Class 9 Chapter 6-MCQs

Solution

1. A homogeneous mixture of two or more than two components is called _________________.
(a) solution
(b) Electrolyte
(c) Suspension
(d) None of these
Show Answer

solution


2. The _______of solution can be changed with in certain limits.
(a) Shape
(b) composition
(c) Properties
(d) All of these
Show Answer

composition


3. Solutions are not limited to _______state only.
(a) Solid
(b) liquid
(c) Gas
(d) Plasma
Show Answer

liquid


4. Alloy is the example of ____________solution.
(a) Solid
(b) Liquid
(c) Gas
(d) Plasma
Show Answer

Solid


5. A solution is made up of ___________components i.e solvent and solute.
(a) 5
(b) 3
(c) 2
(d) 6
Show Answer

2


6. A solution which is made of two components is called _____________solution.
(a) Aqueous
(b) Binary
(c) Saturated
(d) Unsaturated
Show Answer

Binary


Aqueous Solution

7. The solution which is formed by dissolving a substance in water is called on __________solution.
(a) aqueous
(b) Binary
(c) Unsaturated
(d) Saturated
Show Answer

aqueous


8. Salt dissolved in water is an example of ____________solution.
(a) Aqueous
(b) Binary
(c) Saturated
(d) Both a and b
Show Answer

Both a and b


9. In aqueous solution, ___________is present in large amount and is termed as solvent.
(a) Alcohol
(b) water
(c) Acetic acid
(d) None of these
Show Answer

water


Solute and Solvent

10. Water has the ability to dissolve all the substances that is why water is called ____________solvent.
(a) Universal
(b) Concentrated
(c) Dilute
(d) Both a and b
Show Answer

Universal


11. The component of solution which is present in amount is called solute.
(a) Larger
(b) Intermediate
(c) smaller
(d) None of these
Show Answer

smaller


12. The component of solution which is present in ____________amount is called solvent.
(a) Larger
(b) Smaller
(c) Intermediate
(d) All of these
Show Answer

Larger


13. A solute is dissolved in solvent to make ______________.
(a) Mixture
(b) Solution
(c) Compound
(d) Suspension
Show Answer

Solution


14. _____________solution is made by dissolving sugar and water.
(a) Vinegar
(b) Alkaline
(c) Sugar
(d) Salt
Show Answer

Sugar


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Saturated Solution

Unsaturated Solution

Super Saturated Solution

15. The solution which cannot dissolve further amount of solute at a particular _____ is called saturated solution at that temperature.
(a) Temperature
(b) Pressure
(c) Volume
(d) None of these
Show Answer

Temperature


16. When we add more __________in a saturated solution, it will not dissolve and settle down at the bottom.
(a) Solvent
(b) solute
(c) Both
(d) All of these
Show Answer

solute


17. A solution which can dissolve further amount of solute at a particular temperature is called _______solution.
(a) Super saturated
(b) Saturated
(c) unsaturated
(d) None of these
Show Answer

unsaturated


18. Unsaturated solution has _________amount of solute than is required to saturate it at a particular temperature.
(a) less
(b) Same
(c) More
(d) None of these
Show Answer

less


19. A solution which contains more amount of solute than it required to saturate it at a particular temperature is called __________solution.
(a) Saturated
(b) Super saturated
(c) Unsaturated
(d) All of these
Show Answer

Super saturated


Types of Solution

Gaseous Solutions

20. Which one is the example of gas in gas solution?
(a) Air
(b) Cold drink
(c) Fog
(d) Smoke
Show Answer

Air


21. The example of gas in liquid solution is __________________.
(a) Air
(b) Cold drink
(c) Mercury
(d) None of these
Show Answer

Cold drink


22. Cold drinks are made from ______________ and water.
(a) CO_2
(b) NO_2
(c) H_2
(d) Cl_2
Show Answer

CO_2


23. Hydrogen gas adsorbed at palladium is the example of ___________________solution.
(a) Gas in gas
(b) Gas in liquid
(c) Gas in solid
(d) None of these
Show Answer

Gas in solid


Liquid Solutions

24. The example of liquid in gas solution is _______________.
(a) Amalgam
(b) Fog
(c) Alcohol in water
(d) All of these
Show Answer

Fog


25. Alcohol in water is the example of ______________solution.
(a) Liquid in gas
(b) Liquid in liquid
(c) Liquid in solid
(d) None of these
Show Answer

Liquid in liquid


26. The example of liquid in solid solution is _______________.
(a) Mercury amalgams
(b) Smoke
(c) Humidity in air
(d) All of these
Show Answer

Mercury amalgams


27. Mercury is the only metal that is present in __________form.
(a) Solid
(b) liquid
(c) Gaseous
(d) Plasma
Show Answer

liquid


Solid Solutions

28. ______________is the example of solid in gas solution.
(a) Fog
(b) Air
(c) smoke
(d) Mixture
Show Answer

smoke


29. Smoke is formed when _______________particles is mixed with air.
(a) Carbon
(b) Nitrogen
(c) Sulphur
(d) Hydrogen
Show Answer

Carbon


30. Sea water and other solution like sugar in water are the examples of __________ solution.
(a) Solid in gas
(b) Solid in liquid
(c) Solid in solid
(d) All of these
Show Answer

Solid in liquid


31. The Brass and bronze are the examples of ___________solution.
(a) Solid in gas
(b) Solid in liquid
(c) Solid in solid
(d) None of these
Show Answer

Solid in solid


32. Brass is an _____________.
(a) Alloy
(b) Solution
(c) Both a and b
(d) Suspension
Show Answer

Both a and b


33. Brass is a mixture of _________.
(a) Cu and Zn
(b) Cu and S
(c) Zn and Cl
(d) None of these
Show Answer

Cu and Zn


34. Bronze is an alloy of copper and _________________
(a) Potassium
(b) Barium
(c) Radon
(d) tin
Show Answer

tin


Concentration of Solution

35. The concentration of a solution is a ______________of the amount of solute in a given amount of solvent or solution.
(a) Ratio
(b) Product
(c) Equilibrium
(d) None of these
Show Answer

Ratio


36. A solution which contains small amount of solute dissolved in the solvent is called ______solution.
(a) Concentrated
(b) dilute
(c) Super-saturated
(d) Saturated
Show Answer

dilute


37. A solution which contains ______ amount of solute dissolved in the solvent is called concentrated solution.
(a) Large
(b) Medium
(c) Small
(d) All of these
Show Answer

Large


Percentage Composition

38. The number of parts of solute present in _________parts of solvent is called percentage composition.
(a) 10
(b) 50
(c) 70
(d) 100
Show Answer

100


39. The fraction of _________in a solution is called percentage composition.
(a) Solvent
(b) Solute
(c) Solution
(d) Suspension
Show Answer

Solute


40 The number of grams by mass of solute present in 100 grams by mass of solution is called percentage_____.
(a) Mass by mass
(b) Mass by volume
(c) Volume by mass
(d) Volume by volume
Show Answer

Mass by mass


41. 10% solution of sugar by mass means, 10 grams of sugar in _________ grams of solvent to make 100g solution.
(a) 100
(b) 90
(c) 80
(d) 70
Show Answer

90


42. The number of grams by mass of solute present in 100 cm^3 of solution is called _______relationship.
(a) m/m
(b) v/m
(c) m/v
(d) v/v
Show Answer

m/v


43. \frac {mass \ of \ solute}{volume \ of \ solution} \times 100 it is the formula of :
(a) % m/v
(b) %v/m
(c) %m/m
(d) %v/v
Show Answer

% m/v


44. The volume in cm^3 of solute dissolved in 100 grams of solution is called ___________relationship.
(a) m/m
(b) v/v
(c) v/m
(d) m/v
Show Answer

v/m


45. The volume in cm^3 of a solute dissolved per 100 cm^3 of solution is called ______relationship.
(a) m/m
(b) v/v
(c) v/m
(d) m/v
Show Answer

v/v


46. 10% solution of alcohol by volume means, 10 cm^3 of alcohol in sufficient volume of solvent to make _____ of solution.
(a) 100cm^3
(b) 100g
(c) 100ml
(d) 10ml
Show Answer

100cm^3


47. Molarity is a concentration ________________.
(a) Number
(b) Ratio
(c) unit
(d) All of these
Show Answer

unit


Molarity

48. The number of moles of solute per dm^3 of solution is called ________.
(a) Percentage composition
(b) Molarity
(c) Avogadro’s number
(d) None of these
Show Answer

Molarity


49. \frac{amount \ of \ solute in gram}{melecular \ mass \ of \ solute} it is the formula of :
(a) Mole
(b) N_A
(c) Solubility
(d) None
Show Answer

Mole


50. Calculate molarity of a solution containing 7.50 \ mol \ of \ CaCO_3 in enough water to make 1.50 dm^3 of solution?
(a) 5.50 M
(b) 5.0 M
(c) 0.5 M
(d) 0.05 M
Show Answer

5.0 M


51. What will be molarity of solution if 30cm^3 \ of \ 2.5 M \ of \ CaCO_3 solution is diluted to 280 cm^3 ?
(a) 0.267 M
(b) 2.067 M
(c) 6.720 M
(d) 3.458 M
Show Answer

0.267 M


Solubility

52. The amount of solute in grams dissolved in 100 grams of solvent to prepare a __________solution at a given temperature is called solubility.
(a) saturated
(b) Super- Saturated
(c) Unsaturated
(d) Mixture
Show Answer

saturated


53. NaNO_3 is more soluble than _______ in water.
(a) NaCl
(b) LiCl
(c) AgCl
(d) CaCl
Show Answer

AgCl


54. \frac{Wt. \ of \ solute} {Wt. \ of \ solvent} \times 100 it is the general formula of :
(a) Molarity
(b) solubility
(c) Percentage composition
(d) None of these
Show Answer

solubility


Nature of the Solvent

55. Which factor depends upon solubility of solute?
(a) Pressure
(b) Temperature
(c) Nature of solute & solvent
(d) All of these
Show Answer

All of these


56. NaCl has greater solubility in water than ____________.
(a) Benzene
(b) Methane
(c) Hydrochloric acid
(d) Chloric acid
Show Answer

Benzene


Nature of the Solute

57. If a solute is changed and solvent remain the same, the solubility of solute also _________.
(a) Remain same
(b) Constant
(c) changes
(d) Decreasing
Show Answer

changes


58. _____________is the general principle of solubility.
(a) Like dissolve like
(b) Ductility
(c) Sonorous
(d) All of these
Show Answer

Like dissolve like


59. The Polar substances are _______ in polar solvents.
(a) Insoluble
(b) soluble
(c) Partially soluble
(d) None of these
Show Answer

soluble


60 What is the example of ionic solid and polar covalent compound that is soluble in water?
(a) NaCl, KCl
(b) Na_2CO_3 , Sugar
(c) Glucose, alcohol
(d) All of them
Show Answer

All of them


61 Non-polar substances are insoluble in ____________solvents.
(a) Polar
(b) Non-polar
(c) Partially polar
(d) None of these
Show Answer

Polar


62. Which of the following is insoluble in water?
(a) Sugar
(b) benzene
(c) Glucose
(d) All of these
Show Answer

Benzene


63. Non-polar substances are _____________in non-polar solvents.
(a) Soluble
(b) Partially soluble
(c) Insoluble
(d) None of these
Show Answer

Soluble


64. Grease and paints are soluble in _________.
(a) Petrol
(b) Ether
(c) CCl_4
(d) All of them
Show Answer

All of them


65. Lithium Chloride is highly soluble in water but _________is not.
(a) gasoline
(b) Sugar
(c) NaCl
(d) Glucose
Show Answer

gasoline


66. Gasoline mixes readily in benzene but ________does not.
(a) Grease
(b) LiCl
(c) Paints
(d) Ether
Show Answer

LiCl


67. The polarity of water molecules plays on important role in the formation of solutions of ________compounds in water.
(a) Ionic
(b) Metallic
(c) Dative
(d) Covalent
Show Answer

Ionic


68. The solution formation process with water as the solvent is referred to as __________.
(a) Chlorination
(b) Hydrogenation
(c) Hydration
(d) None of these
Show Answer

Hydration


69. Lithium chloride is not soluble in benzene because they differ widely in _____________.
(a) Bonding
(b) Polarity
(c) Inter molecular forces
(d) All of them
Show Answer

All of them


70. Liquid solutes and solvents that are not soluble in each other are called ____________liquids.
(a) immiscible
(b) Miscible
(c) Mobile
(d) None of these
Show Answer

immiscible


71. Liquids that dissolve freely in any proportion are called ________liquids.
(a) Immiscible
(b) Miscible
(c) Mobile
(d) All of these
Show Answer

Miscible


72. Ethanol and water can mix freely because they are.
(a) miscible
(b) Immiscible
(c) Mobile
(d) None of these
Show Answer

miscible


Pressure

73. Solids and liquids are in compressible therefore the solubilitiesof solids and liquids are not affected by changing the _______________.
(a) Temperature
(b) Volume
(c) Pressure
(d) All of these
Show Answer

Pressure


74. Solubility of gases ________with increases in pressure.
(a) Decrease
(b) increase
(c) Remains same
(d) None of these
Show Answer

increase


Temperature

75. Increasing the temperature usually resulting in the decrease of ________solubility.
(a) Gas
(b) Liquid
(c) Solid
(d) Plasma
Show Answer

Gas


76. At _______temperature, gases are generally less soluble.
(a) Lower
(b) Normal
(c) Higher
(d) None of these
Show Answer

Higher


77. Solubility of ________ increases with increase in temperature, but this does not always happen.
(a) Gas
(b) Liquid
(c) solid
(d) All of these
Show Answer

solid


78. The solubility of some solutes increases with rise in temperature. For example _______________.
(a) KNO_3
(b) CaCl_2
(c) Pb{(NO_3)}_2
(d) All \ of \ these
Show Answer

All of these


79. The solubility of some solutes __________ with increase in temperature. For example Ce_2(SO_4), Li_2CO_3 \ and \ CaO etc.
(a) Decrease
(b) Remains same
(c) Increases
(d) None of these
Show Answer

Decrease


80. The solubility of NaCl and KBr is ___________ by increase or decrease in temperature.
(a) Decrease
(b) Not affected
(c) Increase
(d) Remains same
Show Answer

Not affected


Solution

81. The particles of ___________ cannot be seen with naked eye.
(a) Colloids
(b) Suspension
(c) Solution
(d) None of these
Show Answer

Solution


82. The particles of solution _______ through filter paper.
(a) Can pass
(b) Cannot pass
(c) Both a and b
(d) None of these
Show Answer

Can pass


Colloids

83. The particles that are intermediate in size between those in solution and suspension form mixture is known as __.
(a) Solution
(b) Colloids
(c) Suspension
(d) All of these
Show Answer

Colloids


84. The particles between _________ may form colloids.
(a) 1nm to 100nm
(b) 0.1nm to 5nm
(c) 50nm to 200nm
(d) None of these
Show Answer

1nm to 100nm


85. In colloids, solute particles are not _______with solvent.
(a) Hetrogenized
(b) Homogenized
(c) Mixturized
(d) Suspension
Show Answer

Homogenized


86. The particle of colloid ______ through filter paper.
(a) Can pass
(b) Cannot pass
(c) Both a and b
(d) All of these
Show Answer

Can pass


87. A mixture of starch in water is an example of :
(a) Solution
(b) Colloid
(c) Suspension
(d) Mixture
Show Answer

Colloid


Suspension

88. A suspension is a ___________mixture of undissolved particles in a given medium.
(a) Heterogeneous
(b) Same
(c) Homogeneous
(d) None of these
Show Answer

Heterogeneous


89. The ____________of suspension is not uniform throughout.
(a) Structure
(b) Properties
(c) composition
(d) None of these
Show Answer

composition


90. In suspension, the ____________particles are large and can be seen with naked eye.
(a) Solvent
(b) solute
(c) Mixture
(d) None of these
Show Answer

solute


91. The mixture of sand and water is the example of :
(a) Solution
(b) Colloid
(c) Suspension
(d) Mixture
Show Answer

Suspension


92. The process of setting of particles at the bottom is called ___________.
(a) Sedimentation
(b) Purification
(c) Galvanization
(d) None of these
Show Answer

Sedimentation


93. The particles of suspension _______through filter paper.
(a) Can pass
(b) Cannot pass
(c) Restricted
(d) Accepted
Show Answer

Cannot pass


94. A mixture of ___________and water is a suspension.
(a) chalk
(b) Sugar
(c) Benzene
(d) Hydrogen
Show Answer

chalk


95. Medicines, antacid, antibiotics and paracetamoletc are the examples of :
(a) Solution
(b) Colloids
(c) suspension
(d) Mixture
Show Answer

suspension


96. The molarity of NaOH solution by dissolving 4g of it in 250 water is:
(a) 0.4M
(b) 0.2M
(c) 0.8M
(d) 0.1M
Show Answer

0.4M


Review Exercise Chapter # 6

1. Which of the following solution is more dilute:
(a) 1.0M
(b) 0.5M
(c) 0.05M
(d) 0.005M
Show Answer

0.005M


2. Milk is an example of
(a) Solution
(b) Saturated solution
(c) Colloids solution
(d) Suspension
Show Answer

Colloids solution


3. Water droplet in air is an example of solution.
(a) Gas in gas
(b) Gas in liquid
(c) Liquid in Gas
(d) Liquid in Liquid
Show Answer

Liquid in Gas


4. When there is a low concentration of solute in a solution, it is known as:
(a) Dilute solution
(b) Saturated solution
(c) Concentrated solution
(d) Super saturated solution
Show Answer

Dilute solution


5. What is the molarity of a NaNO_3 solution made by diluting 250.0cm^3 of a 1.60 M solution to a final volume of 400cm^3 :
(a) 1.20 M
(b) 1.00 M
(c) 0.200 M
(d) 0.160 M
Show Answer

1.00 M


6. What is the concentration, in % mass by volume (m/v) of a solution containing 15.0g KCl \ in \ 600.0 cm^3 solution?
(a) 5.00 %
(b) 2.00 %
(c) 0.200 %
(d) 2.50 %
Show Answer

2.50 %


7. When KCl dissolves in water, the following will be produced:
(a) K \ and \ Cl
(b) K^+ \ and \ Cl^-
(c) K \ and \ CL_2
(d) None \ of \ these
Show Answer

K^+ \ and \ Cl^-


8. 2 moles of Na_2SO_4 are dissolved in one dm^3 of solution. Molarity of solution.
(a) 1 M
(b) 2 M
(c) 3 M
(d) 0.5 M
Show Answer

2 M


9. Molarity is the number of moles of solute dissolved in:
(a) 1 kg of solvent
(b) 1 kg of solution
(c) 1 dm^3 of solvent
(d) 1 dm^3 of solution
Show Answer

1kg of solution


10. The molarity of a NaOH solution by dissolving 4g of it in 250 ml water is :
(a) 0.4 M
(b) 0.8 M
(c) 0.2 M
(d) 0.1 M
Show Answer

0.4 M


Chemistry Class 9 MCQs (All Chapters)


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