General Science Test 21

General Science

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1. A smoked metal ball, when dipped in water appears to shine brightly. Which of the following phenomena of light is responsible for this ?

 
 
 
 

2. Why does a dead body float in water after some time ?

 
 
 
 

3. Why the hair of a painting brush stick together when taken out of water ?

 
 
 
 

4. Why human breath is visible in winter but not in summer

 
 
 
 

5. Why steam causes more severe burns than boiling water ?

 
 
 
 

6. Why a small space is left between each of the two rails of a railway line ?

 
 
 
 

7. Why water, to which alcohol is addz!d, ii applied on the forehead of a person having high fever ‘?

 
 
 
 

8. Why a clean and dry needle floats when put gently on the surface of water ?

 
 
 
 

9. lee floats on water but sinks in alcohol why

 
 
 
 

10. Why is it more comfortable to swim in sea water than in river ?

 
 
 
 

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