Understanding Organic Compounds

What is the general formula for alkanes?

• CnH2n

• CnH2n-2

• CnH(2n+2)

• C(n-1)H(2n+1)

Which of the following is a characteristic of alkenes?

• Presence of a carbon-carbon double bond

• Presence of a carbon-carbon triple bond

• Contains a benzene ring

• Saturated with hydrogen atoms

What type of isomerism is exhibited by butene?

• Tautomeric isomerism

• Geometric isomerism (cis-trans isomerism)

• Optical isomerism

• Structural isomerism

Which compound is an example of a conjugated diene?

• 1,3-butadiene

• 1,2-butadiene

• isoprene

• cyclohexene

What is the IUPAC name for CH3-CH2-CH2-CH3?

• propane

• butane

• pentane

• hexane

Which of the following compounds is a heterocyclic compound?

• Benzene

• Pyridine

• Acetic acid

• Cyclohexane

What is the main feature of heterocyclic compounds?

• The absence of any ring structure.

• The presence of at least one heteroatom in the ring structure.

• The presence of only carbon atoms in the ring structure.

• The presence of only oxygen atoms in the ring structure.

Which of the following is a property of alkenes?

• Saturation with hydrogen atoms only

• Presence of a carbon-carbon double bond (C=C)

• Formation of cyclic structures exclusively

• Presence of a carbon-carbon single bond (C-C)

What type of isomerism occurs in compounds with the same molecular formula but different structural arrangements?

• Geometric isomerism

• Structural isomerism

• Optical isomerism

• Tautomeric isomerism

Which of the following is a common reaction for alkenes?

• Electrophilic addition reactions

• Polymerization reactions

• Dehydrogenation reactions

• Nucleophilic substitution reactions