Chemistry Mcqs Set 49

Chemistry Mcqs Set 49

1. Pure water contains hydrogen and oxygen which cannot be separated by _______ methods.
a. physical                                    
b. chemical
 
2. ______ are made up of one kind of atom only.
a. molecules                              
b. elements
 
3. There are ________ elements known at present.
a. 118                                             
b. 112
 
4. On the earth’s crust, ________ is the most abundant element.
a. Oxygen                                       
b. Nitrogen
 
5. ______ is a liquid element.
a. Mercury                                        
b. milk
 
6. _______ show the properties of metals as well as non-metals.
a. Metals                                      
b. metalloids
 
7. ______ are malleable.
a. non-metals                                
b. metals
 
8. ________ are bad conductors of geat and electricity.
a. Metals                                    
b. non-metals
 
9. Symbol of neon is ________
a. N                                                   
b. Ne
 
10. Pb is the symbol of ______
a. Lead                                           
b. Potassium