CHEMISTRY CLASS-9TH (MCQs=1707)

Diethyl ether has …………… boiling point.
a) 100oC                                               

b) 87.9oC
c) 34.5oC                                              

d) 78.3OC

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Ethyl alcohol  has………… boiling point.
a) 100oC                                               

b) 56.6oC
c) 24.5oC                                              

d) 78.3OC

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The temperature at which the liquid and solid state exists in equilibrium state is called ……
a) freezing point                

b) boiling point
c) sublimation point                           

d) melting point

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When the liquid is cooled, kinetic energy……
a) decreases                                        

b) increases
c) remains same                  

d) none of these

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Barometer was invented by ………..
a) Galileo                                              

b) E. Torricelli
c) Robert Boyle                   

d) Thomson

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Barometer was invented by E. Torricelli in.…
a) 1600 

b) 1646                 

c) 1645 

d) 1648

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