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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