CHEMISTRY CLASS-9TH (MCQs=1707)

Vapor pressure.…as the size of the molecules increases
a) decreases                                        

b) increases
c) both a & b                                       

d) none of these

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Pentane has molecular formula …………
a) C4H10                                

b) C6H14
c) C3H8                                  
d) C5H12

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Molecular formula of decane is …………
a) C₃H₈                                 

b) C₄H₁₀
c) C₅H₁₂                                

d) C₁₀H₂₂

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Decane has ………….. vapor pressure than pentane.
a) low                                    

b) high
c) very high                                          

d) none of these

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Chloroform has molecular formula of ……..
a) CCl4                                                  

b) CH2Cl2
c) CHCl3                                               

d) CH3Cl

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Carbon tetrachloride has molecular formula of………….
a) CCl4                                  

b) CH2Cl2
c) CHCl3                                               

d) CH3Cl

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