NUMS 2020 PAPER

1. If the length of wire become two times to its original value and area become one half to its original value then resistance of wire become:

 
 
 
 

2. The unit of resistivity is:

 
 
 
 

3. 1 kilowatt hour =

 
 
 
 

4. It is a null type resistance device for measuring potential differences:

 
 
 
 

5. Which statement is true about electron affinity

 
 
 
 

6. The bond which is based on attractive forces between oppositely charged ion is:

 
 
 
 

7. Which statement is incorrect regarding a chemical bond

 
 
 
 

8. The carbonates of alkali metals are soluble in water except:

 
 
 
 

9. The nitrides of alkaline earth metals hydrolyze with water to form:

 
 
 
 

10. The flame colour of Ca in flame test is:

 
 
 
 

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