Question 1

Which reagent is commonly used to oxidize a primary alcohol to a carboxylic acid in organic synthesis?

Accepted Answer

KMnO$$_4$$

Question 2

A student wants to convert an alkene to a diol. Which reagent from the study materials would be most appropriate for this transformation?

Accepted Answer

KMnO$$_4$$, H$$^+$$

Question 3

During the synthesis of ethene from ethanol, which reagent is typically used to promote dehydration?

Accepted Answer

Conc. H$$_2SO$_4$$

Question 4

Which of the following reagents is best suited for the reduction of a nitro group to an amine?

Accepted Answer

Zn, H$$_2O$$

Question 5

A chemist is attempting to brominate an alkene in aqueous solution. Which reagent should be used?

Accepted Answer

Br$$_2$$, H$$_2O$$

Question 6

Which of the following is the correct balanced equation for the oxidation of ethanol to ethanoic acid using potassium permanganate?

Accepted Answer

$$\mathrm{CH_3CH_2OH + 2KMnO_4 \rightarrow CH_3COOH + 2MnO_2 + 2KOH + H_2O}$$

Question 7

In a laboratory experiment, a student adds conc. H$$_2SO$_4 to $$ethanol and heats the mixture. What is the major product?

Accepted Answer

Ethene

Question 8

Which reagent is used to test for the presence of unsaturation (double bonds) in organic compounds?

Accepted Answer

Br$$_2$$, H$$_2O$$

Question 9

A student wants to convert a haloalkane to an alcohol. Which reagent from the study materials would be most suitable?

Accepted Answer

KOH (aq)

Question 10

Which of the following best describes the role of conc. H$$_2SO$_4 in $$the dehydration of ethanol?

Accepted Answer

It acts as a catalyst and dehydrating agent.

Question 11

A reaction mixture contains ethene and is treated with Br$$_2$$, H$$_2O. $$What is the expected product?

Accepted Answer

Bromoethanol

Question 12

Which reagent is most appropriate for the conversion of a phenol to a quinone?

Accepted Answer

KMnO$$_4$$

Question 13

A student refluxes ethanol with conc. H$$_2SO$_4. $$Which type of reaction is this?

Accepted Answer

Dehydration

Question 14

Which of the following is a correct sequence for the conversion of ethene to ethanoic acid?

Accepted Answer

Ethene $$\xrightarrow{$$KMnO_4$$}$$ Ethanoic acid

Question 15

Which reagent is used in the reduction of iron(III) to iron(II) in aqueous solution?

Accepted Answer

Zn, H$$_2O$$

Question 16

A student adds KOH to a haloalkane in aqueous solution. What is the expected product?

Accepted Answer

Alcohol

Question 17

Which of the following reactions is an example of an electrophilic addition?

Accepted Answer

Ethene + Br$$_2$$, H$$_2O$$ $$\rightarrow$$ Bromoethanol

Question 18

Which reagent is used to oxidize iron(II) to iron(III) in aqueous solution?

Accepted Answer

KMnO$$_4$$

Question 19

A student wants to test for the presence of phenol in a sample. Which reagent from the study materials would be most appropriate?

Accepted Answer

Br$$_2$$, H$$_2O$$

Organic Chemistry: Practice Questions on Reactions and Reagents

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