Chemistry Test Organic Chemistry 4

Question 1

Which of the following is an example of a conjugated diene?

Accepted Answer

1,3-butadiene

Answer

1,3-Butadiene has alternating single and double bonds (conjugated system), unlike 1,4-pentadiene which is isolated.

Question 2

What is the major product of treating benzene with Br₂ in the presence of FeBr₃?

Accepted Answer

Bromobenzene

Answer

FeBr₃ acts as a Lewis acid catalyst for electrophilic aromatic substitution, producing bromobenzene with HBr as byproduct.

Question 3

Which reagent converts a carboxylic acid to an acid chloride?

Accepted Answer

PCl₅ or SOCl₂

Answer

Both PCl₅ and SOCl₂ (thionyl chloride) are commonly used to convert carboxylic acids to acid chlorides.

Question 4

In a Fischer projection, horizontal bonds point toward the viewer and vertical bonds point away. For D-glucose, the –OH on C-5 points in which direction?

Accepted Answer

Right

Answer

In D-glucose (D-configuration), the –OH on the highest-numbered chiral center (C-5) points to the right in the Fischer projection.

Question 5

What type of polymer is nylon formed by?

Accepted Answer

Step-growth (condensation) polymerization

Answer

Nylon is a polyamide formed by step-growth condensation polymerization between diamine and dicarboxylic acid monomers, releasing water.

Chemistry Practice Test Practice Test

Chemistry Practice Test Practice Test

Chemistry Test Organic Chemistry 4