Chapter 15 Multiple Choice Questions

. Which alkene is the most reactive in acid-catalysed hydration?

. Which alkene is the least reactive in acid-catalysed hydration?

. Which of the following alkenes gives a main product different from the products from the others in reactions with hydrogen chloride?

. Which is the main product when 2-methylbuta-1,3-diene reacts with one equivalent of HBr for a limited time below 0 °C?

. Which is the main product when 2-methylbuta-1,3-diene reacts with one equivalent of HBr at room temperature for a prolonged time?

. Which alkene gives a meso compound upon reaction with Br₂ in CH₂Cl₂?

. Which alkene gives a racemate upon reaction with Br₂ in CH₂Cl₂?

. Which of the following reactions does not give 3-methylbutan-2-ol as the main product?

. Which of the following equations does not show the correct main products?

. Which of the following statements is wrong?

In the epoxidation of an alkene with a peroxy acid, the peroxy acid is electrophilic.

The addition of bromine to cyclohexene is stereospecific but the product is a racemate.

Hydroboration-oxidation of a terminal alkyne gives a ketone as the main product.

Hydrogenation of an internal alkyne over the Lindlar catalyst gives a cis alkene.

. Which alkene is most reactive in acid-catalysed hydration?

. Which alkene is least reactive in acid-catalysed hydration?

. Which alkene is most reactive in its reaction with hydrogen chloride?

. Which alkene is most reactive in reaction with hydrogen chloride?

. Which of the following alkenes gives a main product different from the products of the other three in reactions with hydrogen chloride?

. Which of the following reactions gives a meso compound as the main product?

. Which is the main product in the reaction of but-1-yne with an excess of hydrogen chloride?

CH₃CH₂CH₂CHCl₂

. Which is the main final product when the initial product (4,5-dibromopent-2-ene) from the 1,2-addition of bromine to penta-1,3-diene is heated in solution?

. Which of the following equations does not show the correct main products?

. Which of the following statements is wrong?

The main orbital interactions in the transition state of an electrophilic addition to an alkene are between the LUMO of the electrophile and the HOMO of the alkene.

The lower the LUMO of the electrophile, the more reactive it is.

The lower the HOMO of the alkene, the more reactive it is.

The electrophile approaches the alkene from above its molecular plane in addition reactions.

Quiz Content