Question 1

pentane has several isomers. Which of thefollowing condensed formula is not an isomer of pentane?

Accepted Answer

CH₃CH(C₂H₅)₂

Answer

CH₃CH₂ CH(CH₃)₂

Answer

CH₃ CH₂ CH₂CH₂CH₃

Answer

CH₃ C(CH₃)₂CH₃

Question 2

What is the ideal angle between the H-C-C bondin ethylene?

Accepted Answer

120°

Answer

180°

Answer

90°

Answer

109°

Question 3

The IUPAC nameof the following compound is......

Accepted Answer

4-ethyl-2-methylheptane

Answer

2-methyl-4- propyl hexane

Answer

3- ethyl-1,1-dimethylhexane

Answer

2-ethyl-3-methylheptane

Question 4

What is the major product formed when excess HCIis added to 1-butyne?

Accepted Answer

CH₃CH₂CCl₂CH₃

Answer

CH₃CH₂CH = CH Cl

Answer

CH₃CH₂CHClCH₂Cl

Answer

CH₃CH₂CH₂CHCl₂

Question 5

The IUPAC name of this compound is....

Accepted Answer

5-methyl-1,3- cyclohexadiene

Answer

1-methyl-2,4-cyclohexadiene

Answer

3- methyl cyclohexene

Answer

toluene

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