Chemistry Mcqs Set 42

Chemistry Mcqs Set 42

1. Which of the following is an irreversible change?
(a) Evaporation of water                                 
(b) Melting of ice
(c) Making ornaments from silver                 
(d) Ripening of fruits
 
2. Which of the following is a desirable change?
(a) Earthwuake                
(b) Accident                
(c) Blooming of volcano                
(d) Landslide
 
3. Which of the following is a periodical change?
(a) Heart beat                   
(b) Earthquake               
(c) Eruption of volcano                 
(d) Landslide
 
4. Which of the following is a non-periodical change?
(a) `Oscillation of pendulum                           
(b) Phases of moon
(c) Occurrence of day and night                     
(d) Earthquake
 
5. The reactions in which heat is liberated are called ____ reactions.
(a) Endothermic                      
(b) Exothermic                    
(c) Adiabatic                   
(d) Isothermic
 
6. The reactions in which heat is absorbed are called ____ reactions.
(a) Endothermic                       
(b) Exothermic             
(c) Adiabatic                    
(d) Isothermic
 
7. In some changes, the substance can be brought back to its original state. Such changes are called _____ changes.
(a) Periodic                       
(b) Non-periodic                
(c) Undesirable                  
(d) Reversible
 
8. Changes that are useful are called ____changes.
(a) Undesirable                         
(b) Desirable            
(c) Periodic                           
(d) Irreversible
 
9. Dissolution of glucose in water is an example of_______ reaction.
(a) Adiabatic                 
(b) Isothermal                     
(c) Edothermic                    
(d) Exothermic
 
10. When Ammonium chloride is dissolved in water _____ is absorbed.
(a) Mass                            
(b) Heat                        
(c) Time                     
(d) Salt