Organic chemistry: Cyclic Hydrocarbons

#1. (35) The bond length between only two carbon atoms in C6H6, molecule is average in length in …….

(a) C₂H₂ , C2H6

(b) C2H6,C2H4 .

(c) C2H₂, C2H4

(d)C3H8,C2H6

#2. (36) The chemical name of the compound DDT is …………

(a) Dichloro, diphenyl, trichloroethane.

(b) trichloro, triphenyl, dichloromethane

(c) dichloro, diphenyl, trichloromethane

(d) trichlor, triphenyl, dichloroethane

#3. 15 )Give the scientific explanation for each of the following: (1) Cyclopropane is more active than cyclobutane.

a)Because the angle between bonds in cyclopropane =60 while in cyclobutane=90 and the small angles lead to weak combination between carbon atms

b)-because the angle between bonds in cyclopropane =90 while in cyclobutane=60 and the small angles lead to weak combination between carbon atms

c)because the angle between bonds in cyclopropane =100 while in cyclobutane=90 and the small angles lead to weak combination between carbon atms

d)because the angle between bonds in cyclopropane =50 while in cyclobutane=60 and the small angles lead to weak combination between carbon atms

#4. (2) Cyclopropane forms a severe combustible mixture with air.

a)Due to the larger angles between bonds which leads to weak overlapping between orbitals and weak bonds between carbon atoms and more activation of cyclopropane

b)Due to the smaller angles between bonds which leads to weak overlapping between orbitals and weak bonds between carbon atoms and more activation of cyclopropane

c)Due to the larger angles between bonds which leads to strong overlapping between orbitals and weak bonds between carbon atoms and more activation of cyclopropane

d)Due to the smaller angles between bonds which leads to strong overlapping between orbitals and weak bonds between carbon atoms and more activation of cyclopropane

Organic chemistry: Cyclic Hydrocarbons – Quiz 8

Results

#1. (35) The bond length between only two carbon atoms in C6H6, molecule is average in length in …….

#2. (36) The chemical name of the compound DDT is …………

#3. 15 )Give the scientific explanation for each of the following: (1) Cyclopropane is more active than cyclobutane.

#4. (2) Cyclopropane forms a severe combustible mixture with air.