Definitions and MCQs of Ninth class chemistry (solution and suspension)

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Definitions and MCQs of Ninth class chemistry (solution and suspension)

  1. 1. Chapter 7Solution and Suspension(Solving the problems is the solution ofproblems than increasing the problems byworrying on the problems…!) DefinitionsChemistry MCQs Dr. Sajid Ali Talpur
  2. 2. 1. Solution: -the homogeneous mixture of two ormore things.2. Solute: - It is the component of solution presentin smaller amount and is dissolved by thesolvent.3. Solvent: - It is the component of solutionpresent in greater amount and dissolves thesolute.4. Unsaturated solution: - It is that one solutionwhich contains less solute than it has thecapacity to dissolve.5. Saturated solution: - It is that one solutionwhich contains maximum amount of solute andcan not dissolve more solute at a giventemperature6. Super saturated solution: - It is that onesolution which contains more solute than thenormal capacity and this is done usually byincreasing temperature.7. Crystallization: - The process in whichdissolved solute comes out of solution andforms crystals is called crystallization.8. Molarity: - The number of moles of solutedissolved in 1 liter (1dm3) of a solution is calledmolarity. It is denoted by (M).Chemistry MCQs Dr. Sajid Ali Talpur
  3. 3. 9. Molality : - The number of moles of solutedissolved in 1 kilogram of solution is calledmolality. It is denoted by (m).10. Mole fraction: - Mole fraction of anycomponent in a solution is the number of molesof the component divided by total number ofmoles making up solution. It is denoted by X.11. Suspension: - It is defined as a heterogenousmixture consists of visible particles whichremain suspended in the liquid. Multiple Choice QuestionsChemistry MCQs Dr. Sajid Ali Talpur
  4. 4. 1. A heterogeneous mixture of two or moresubstances is called solution:a) true b) false2. there are types of solutionsa) 2 b) 3c) 5 d) 93. The composition of air is asa) 78% N2, 21% O2, 1% Ar.b) 78% N2, 15% O2, 5% CO2, 1 other gasesc) 78% N2, 21% O2, 1% other gasesd) all are possible4. alloys are the mixture of:a) solid-solid b) solid-liquidc) liquid-gas d) solid-gas5. which of the following does not affect thesolubility:a) temperature b) size of particlesc) pressure d) nature of solutee) nature of solvent6. the solubility of gases increases with theincrease in temperature.a) true b) false7. Only the solubility of is affected by pressure.a) solids b) liquidc) gases d) plasma8. ionic compounds are not dissolved in:a) polar solvent b) non-polarChemistry MCQs Dr. Sajid Ali Talpur
  5. 5. c) water d) A.O.T9. A solution which has the capacity to dissolvemore solute is called:a) saturated solution b) unsaturated solutionc) super saturated d) N.O.T10. the process in which the dissolved solute comesout of the solution is called:a) titration b) solubilityc) crystallization d) N.O.T11. what is the molarity of a solution when 10 gNaOH are dissolved in 1 liter solution:a) 0.25M b) 0.5Mc) 1M d) 2MThe Book MCQs12. the suspended particles in the suspensions aregenerally of the size:a) 10nm b) 100nmc) 1000nm d) 1200nm13. the sum of mole fraction of solute and solvent isequal to:a) 1 b) 2c) 3 d) 414. solubility is defined as the amount of solute ingram at a given temperature, dissolved in ……of the solvent.Chemistry MCQs Dr. Sajid Ali Talpur
  6. 6. a) 10g b) 20gc) 100g d)1000g15. the process in which solid directly changes tovapours is called.a) sublimation b) evaporationc) diffusion d) boiling16. the solubility of gas …….with the rise intemperature.a) increase b) decreaseAnswer Key1 B 2 D 3 C4 A 5 B 6 B7 C 8 B 9 B10 C 11 A 12 C13 A 14 C 15 A16 BChemistry MCQs Dr. Sajid Ali Talpur
  7. 7. a) 10g b) 20gc) 100g d)1000g15. the process in which solid directly changes tovapours is called.a) sublimation b) evaporationc) diffusion d) boiling16. the solubility of gas …….with the rise intemperature.a) increase b) decreaseAnswer Key1 B 2 D 3 C4 A 5 B 6 B7 C 8 B 9 B10 C 11 A 12 C13 A 14 C 15 A16 BChemistry MCQs Dr. Sajid Ali Talpur

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