Organic Chemistry Practice Test 2

1. Benzyl chloride is reacted with different nucleophiles (HO^-, CH₃COO^-, PhO^-, CH₃O^-). Arrange them in the decreasing order of reactivity with Benzyl chloride.

CH₃O^- > HO^- > PhO^- > CH₃COO^-

HO^- > CH₃O^- > PhO^- > CH₃COO^-

CH₃COO^- > CH₃O^- > HO^- > PhO^-

HO^- > PhO^- > CH₃O^- > CH₃COO^-

2. Identify the compound with the highest ring strain.

Cyclomethane

Cyclobutane

Cyclopentane

Cyclopropane

3. In which medium Favorskii rearrangement occurs?

Basic

Alkaline

Neutral

Acidic

4. Which types of isomers are formed in rearrangement reactions?

Optical isomer

structural isomers

Conformational isomers

Geometrical isomers

5. Identify the correct statement which is related to aromatic hydrocarbon?

It has a sigma and two pi bonds

It has a sigma and delocalized pi bond

It has only pi bonds

It has only sigma bonds

6. Identify the incorrect statement.

Petroleum and natural gas are the main sources of alkanes

They are very reactive

Alkanes with repeated –CH₂- units constitute a homologus series

They have very less biological activity

7. Select the incorrect statement.

Alkynes readily undergo oligomerization

Alkynes do not undergo polymerization

The pi system of the alkynes gets weakened when they lose the pi atoms

The addition reactions occur more frequently in the alkenes than the alkynes

8. Identify the reagent which is not commonly used in qualitative analysis?

6M NaOH

6M HNO₃

6M HCl

6M NH₄

9. Identify the incorrect statement regarding cycloalkenes.

The bonds in them are fewer compared to those in alkenes

These undergo polymerization

They occur in gaseous form in nature

The conjugated double bonds in them increase their stability

10. Alkynes are more reactive than alkenes.

True

False