10-minute Quiz : Ch45 Inter-conversions of carbon compounds

Which of the compounds as shown, upon heating under reflux with excess acidified potassium dichromate solution, will give an organic product with a chiral centre?

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

Consider the conversion of carbon compounds as shown. Which of the combinations of steps is correct?

• A
• B
• C
• D

Consider the conversion of carbon compounds as shown. Which of the combinations of steps is correct?

• A
• B
• C
• D

Hept-4-enal, which can be found in cow’s milk, has the following structure:

CH₃CH₂CH=CHCH₂CH₂CHO

What would be produced when this compound is allowed to react with H₂ in the presence of nickel, and then with NaBH₄ in ethanol?

• A. CH₃(CH₂)₅CH₃
• B. CH₃(CH₂)₅CHO
• C. CH₃(CH₂)₅CH₂OH
• D. CH₃(CH₂)₅CO₂H

The compound as shown can be synthesized by heating X in the presence of Y under reflux. Which of the combinations about X and Y is correct?

• A
• B
• C
• D

Consider the conversion of carbon compounds as shown. Which of the following statements concerning this conversion are correct?

(1) Step 1 is a substitution reaction.

(2) Hot sodium hydroxide solution can be used in the reaction for Step 1.

(3) Hot sodium chloride solution can be used in the reaction for Step 2.

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

Consider the reaction as shown. What may X and Y be?

• A. H₂NCH₂OH and HOCH₂CHO
• B. HOCH₂NH₃⁺ and HOCH₂CHO
• C. H₂NCH₂COOH and HOCH₂COOH
• D. HOOCCH₂NH₃⁺ and HOCH₂COOH

Consider the preparation of benzoic acid from ethyl benzoate. Which of the following chemical reagents is/are required for the preparation?

(1) Sodium borohydride solution

(2) Sodium hydroxide solution

(3) Concentrated hydrochloric acid

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

Direction: Questions 9 and 10 refer to the three-step conversion of carbon compounds as shown.

Referring to the synthetic route, what are the reagent(s) and reaction condition(s) required for Step 1?

• A. Br₂ (in organic solvent), light
• B. HBr
• C. NaOH(aq), heat
• D. CH₃OH(aq), concentrated H₂SO₄(l), heat

Direction: Questions 9 and 10 refer to the three-step conversion of carbon compounds as shown.

Referring to the synthetic route, what are the reagent(s) and reaction condition(s) required for Step 2?

• A. PBr₃
• B. Al₂O₃, heat
• C. NaBH₄(aq)
• D. LiAlH₄, dry ether; then H⁺(aq)