Test Yourself : Chapter 43 Isomerism

Which of the following statements concerning some types of isomers are correct?

(1) Chain isomers have the same molecular mass.

(2) Position isomers have the same molecular formula.

(3) Functional group isomers have different chemical properties.

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

Which of the following compounds are structural isomers of 2-methylpentanoic acid?

(1) Hexanoic acid

(2) Ethyl butanoate

(3) Propyl propanoate

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

Which of the following compounds exhibits cis-trans isomerism?

(1) CH₃CH=CHBr

(2) CHF=CHCl

(3) CH₂FCH=CCl₂

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

Consider the two compounds as shown in the diagram. Which of the following statements concerning these two compounds are correct?

(1) They have the same molecular formula.

(2) They have the same boiling point.

(3) They form the same product in the reaction with chlorine.

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

The molecular formula of compound X is C₄H₄Cl₂, which has two carbon-carbon double bonds. How many cis-trans isomers does X have?

• A. 1
• B. 2
• C. 3
• D. 4

Which of the following statements concerning a pair of enantiomers are correct?

(1) They contain at least one chiral carbon atom.

(2) They have the same type of intermolecular forces.

(3) They can rotate the plane of polarization of a beam of plane polarized light in the same direction, but to the different extents.

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

Which of the pairs of compounds can be distinguished by using a polarimeter?

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

Consider the compound as shown. Which of the compounds is/are is enantiomer(s)?

• A. (1) only
• B. (2) only
• C. (1) and (3) only
• D. (2) and (3) only