Chemistry Mcqs Set 43

Chemistry Mcqs Set 43

1. Dissolution of quick lime in water is an example of _______ reaction.
(a) Exothermic                
(b) Endothermic           
(c) Isochronous                  
(d) Isobaric
 
2. Dissolution of detergent powder in water is an example of _____ reaction.
(a) Exothermic               
(b) Endothermic                     
(c) Isochronous                    
(d) Isobaric
 
3. A suitable method to separate lighter impurities from a mixture is_____
(a) winnowing                   
(b) hand picking               
(c) evaporation        
(d) magnetic separation
 
4. In a mixture, solids of different size can be separated by_______
(a) magnetic separation                   
(b) Winnowing                  
(c) sieving                 
(d) evaporation
 
5. The method used to separate seeds from fruit juice is_____
(a) filtration                       
(b) sieving                   
(c) crystallization                   
(d) winnowing
 
6. Separation of common salt from the sea water is done by______
(a) sieving                     
(b) evaporation                
(c) magnetic separation              
(d) winnowing
 
7. The method used to separate substances that differ in colour, size and Shape from a solid mixture is_____
(a) magnetic separation                
(b) decantation                  
(c) handpicking             
(d) sieving
 
8. While preparing tea, the tea dust is separated by____
(a) sieving                  
(b) winnowing                      
(c) filtration                         
(d) evaporation
 
9. Pure rava when adulterated with wheat flour is separated by_____
(a) sieving                     
(b) filtration            
(c) condensation                 
(d) magnetic separation
 
10.The method of separating the substances based on size, colour and shape using hands is called______
(a) sieving            
(b) winnowing               
(c) hand picking              
(d) magnetic separation