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General Science Class 6th MCQs=745

Contents

Solution and Suspension                  

  • When something not solvable in liquid (water + soil) the mixture is called heterogeneous mixture.
  • When something solvable in liquid (water + salt) the mixture is called homogeneous mixture.
  • When we something solve in water, for example salt solve in water. The solvable thing is called Solute (مُنحل) and
  • water is called solvent (مُحلل). And the mixture of both is called solution (محلول).
  • The solution in which water is taken as solvent is known as aqueous solution.
  • Aqua is a Latin words meaning water.
  • The solution in which solvent is something other than water is called non aqueous solution.
  • 70% of human body is made up of water.
  • Water also is called universal solvent.
  • The solution that contain maximum amount of dissolved solute is described as a saturated solution (سیر شدہ).
  • The solution that contains less solute and can still accommodate some more under the same condition is known as unsaturated solution (غیرسیرشدہ).
  • Dilute solution are those solution, which contain small amount of dissolved solute in the solution.
  • Concentrated solutions are those solutions which contain large amount of dissolved solute in the solution.
  • As temperature increase, solubility’s of gases decrease.

Which of these are completely soluble in water
a) Sand                                   
b) Cooking oil 
c) Wax                        
d) Table salt

Which of the following is soluble in water?
NTS PET 24/08/2019 (1:30)
a) Sand                                   
b) Chalk Dust
c) Sodium chloride     
d) wax

A solution is made by dissolving some salt in a beaker of water. The salt is referred as………
a) Solute                     
b) Filtrate        
c) Solution                  
d) Solvent

Solubility of which of the following substance increases with increase in temperature?
a) table salt (NaCl)      
b) carbon dioxide
c) potassium nitrate   
d) oxygen

Which statement is true for saturated solution?
a) maximum solute at given temperature
b) can dissolve more solute
c) small amount of solute
d) further added solute will vanish

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