Homologous series in which there is only difference of ............. A) only hydrogen , B ) only CH , C) only CH2 , D)None of these ,

1 )  Homologous series in which there is only difference of . . . . . . . . . . . . . . ,

A) only hydrogen ,                                      B ) only CH ,

C) only CH2 ,                                             D)None of these ,

Correct Answer : -   C) only CH2 ,

 

2 ) . . . . . . . . . . . . . . is used as a best Antiknock compound .

A) Ether ,                                          B )  Ethyl bromide ,

C) Tetra ethyl lead ,                                    D ) None of these ,

Correct Answer : -    C) Tetra ethyl lead ,                   

 

3 )  Gasoline evaporates faster than water because of . . . . . . . . . . . .

A )  strong bonding ,                                  B ) viscosity ,

C ) weak vander wall forces ,                      D ) None of these ,

Correct Answer:-  C ) weak vander wall forces ,

 

4 )  If external forces of liquid increases , so boiling of liquid will ..................

A) No effects,                                             B ) increase ,

C) decrease ,                                               D )  None of these ,

Correct Answer : -   B ) increase ,

 

5 )  Elements with partially filed d-orbitals are called . . . . . . . . . . . . . . . ,

A )  Alkali metals ,                                      B )  inner transition metals ,            

C )  noble gases ,                               D ) None of these ,

Correct Answer : -     B )  inner transition metals ,     

 

6 )   Branched alkanes are . . . . . . . . . . . . . . . . than linear alkanes.

A) less stable ,                                             B) more stable ,

C) same in stability  ,                                 D)None of these ,

Correct Answer : -  B) more stable ,

 

7 )  Octane no. of n-heptane is . . . . . . . . . . . . . . ,

A )  0 ,                                                         B ) 100 ,

C ) 137 ,                                            D ) None of these ,

Correct Answer : -  A )  0 ,    

 

8 ) Octane no. of  iso - octane is . . . . . . . . . . . . . . ,

A ) 0 ,                                                         B ) 100 ,

C ) 137 ,                                            D ) None of these ,

Correct Answer : -   B ) 100 ,

 

9 )   ∆ H  neutralization  is defined as energy released with the formation of 1mole of water . Enthalpy changes of neutralization is always . . . . . . . . . . . . . . ,

A ) Negative ,                                             B ) Positive ,

C ) Zero or neutral ,                                    D )  None of these ,

Correct Answer : -  A ) Negative ,  

 

10 )   According to le – chatellier principle , adding heat to a solid and liquid , equilibrium will cause the amount of solid to . . . . . . . . . . . . . . . . . ,

A ) Increase ,                                                        B ) Decrease ,

C ) remain same ,                                                 D ) None of these ,

Correct Answer : -   B ) Decrease ,

Because more liquid is formed by increase of temperature .

 

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