Chemistry Mcqs Set 54

Chemistry Mcqs Set 54

1. The solubility of a solute A in a given solvent increases with the increase in Temperature. This means that .............
(i) When the solute is added to the solvent, the heat is absorbed during dissolution
(ii) When the solute is added to the solvent, the heat is liberated during dissolution
(iii) No heat is liberated or absorbed during dissolution
(iv) The solute may be a exothermic compound
 
2. Choose the incorrect statement from the following:
(i) Colloidal solution consists of two phases in which the dispersed phase is dispersed in a dispersion medium
(ii) Tyndall effect is shown by a solution in which the size of the particle is greater than that present in a true solution and less than that present in a suspension
(iii) Brownian motion is observed in a colloidal solution
(iv) The colloidal particles do not diffuse in a solution
 
3. The mass of a gas dissolved in a fixed volume of a liquid is directly proportional to the pressure of the gas. This statement is Known as ............
(i) Boyles law                    
(ii) Raoult’s law           
(iii) Henry’s law             
(iv) gay Lussac law
 
4. 10g of sodium chloride is dissolved in 50g of water. The concentration of the solution in terms of weight percent is ..............
(i) 16.6 %                
(ii) 50%                                
(iii) 1.66%                           
(iv) 25%
 
5. Which of the following is a true solution?
(i) a solution of sugar and water                   
(ii) a solution of ethanol and sugar
(iii) a mixture of mud water                                     
(iv) milk
 
6. Colloidal solutions are made up of two phases viz dispersed phase and dispersion medium. In milk, the dispersed phase and dispersion medium are ..............
(i) solids                          
(ii) liquids                
(iii) gases            
(iv) solid and liquid repellent
 
7. A heterogeneous mixture in which the dispersion does not occur at all is known as ....................
(i) true solution                  
(ii) suspension                   
(iii) colloid                  
(iv) aqueous solution
 
8. The solubility of copper sulphate in water is 20.7g at 20oC. A solution of copper sulphate containing 10g of copper sulphate in 100g of water is known as .............
(i) saturated                    
(ii) unsaturated       
(iii) super saturated                  
(iv) semi saturated
 
9. the solubility of sodium nitrate in 92g at 25oC. The solubility may be increased by ..............
(i) increasing temperature                              
(ii) decreasing temperature
(iii) adding more sodium nitrate                     
(iv) adding more water
 
10. A solution ‘A’ contains 10g of sugar in water. Another solution ‘B’ contains 20g of sugar in water. Solution B is more ............. than A.
(i) diluted                  
(ii) concentrated                     
(iii) saturated                
(iv) unsaturated