Functional Groups Quiz: Chemistry Viva Questions and Tests

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Questions and Answers

What is the Lucas reagent composed of?

Zinc chloride and sodium hydroxide

Zinc sulfate and dilute hydrochloric acid

Zinc sulfate and concentrated hydrochloric acid

Zinc chloride and concentrated hydrochloric acid (correct)

Which organic compound is identified by the Ceric ammonium nitrate test?

Carboxylic acid

Aldehyde

Alcohol (correct)

Phenol

Which type of alcohol gives immediate turbidity with Lucas reagent?

Primary alcohol

Secondary alcohol

Tertiary alcohol (correct)

Aromatic alcohol

What is the purpose of the 2,4-DNPH test?

To differentiate aldehydes and ketones Signup and view all the answers

Which test is used to differentiate between 3 types of alcohols?

Lucas test Signup and view all the answers

Which reagent is used to differentiate primary, secondary, and tertiary alcohols?

Lucas reagent Signup and view all the answers

What is the name of the test used for identifying primary amines?

Carbylamine test Signup and view all the answers

What gas is liberated in the sodium bicarbonate test for carboxylic acids?

Carbon dioxide Signup and view all the answers

Which functional group gives a pink color in the Phthalein test?

Phenol Signup and view all the answers

What type of organic compound is identified by 2,4-DNP reagent?

Carbonyl compounds (aldehydes and ketones) Signup and view all the answers

What is the composition of Lucas reagent used to differentiate between 3 types of alcohols?

Anhydrous zinc chloride (ZnCl2) and concentrated hydrochloric acid (HCl) Signup and view all the answers

Which type of alcohol gives immediate turbidity with Lucas reagent?

Tertiary alcohols Signup and view all the answers

What is the purpose of the 2,4-DNPH test?

To distinguish between aldehydes and ketones Signup and view all the answers

Which functional group gives a pink color in the Phthalein test?

Carboxylic acids Signup and view all the answers

Which organic compound is identified by the Ceric ammonium nitrate test?

Alcohols Signup and view all the answers

Which test is used to identify carboxylic acids?

Esterification test Signup and view all the answers

What gas is liberated in the sodium bicarbonate test for carboxylic acids?

Carbon dioxide (CO2) Signup and view all the answers

Which organic compound gives a silver mirror with Tollen's reagent?

Aldehydes Signup and view all the answers

What colour is observed when aldehydes are heated with 2,4-DNP reagent?

Crystalline orange precipitate Signup and view all the answers

Which type of organic compound is identified by performing the Carbylamine test?

Primary amines Signup and view all the answers

Study Notes

Identification of Organic Compounds

The Lucas reagent is composed of zinc chloride and hydrogen chloride (HCl).
The Ceric ammonium nitrate test is used to identify aldehydes.
Tertiary alcohols give immediate turbidity with Lucas reagent.

Identification of Alcohols

The Lucas reagent is used to differentiate between primary, secondary, and tertiary alcohols.

Identification of Amines

The test used to identify primary amines is the Carbylamine test.

Identification of Carboxylic Acids

The sodium bicarbonate test is used to identify carboxylic acids.
Carbon dioxide (CO2) gas is liberated in the sodium bicarbonate test for carboxylic acids.

Identification of Other Compounds

The 2,4-DNPH (2,4-dinitrophenylhydrazine) test is used to identify aldehydes and ketones.
A yellow, orange, or red color is observed when aldehydes and ketones are heated with 2,4-DNP reagent.
The Phthalein test is used to identify phenols, which give a pink color.
The 2,4-DNP reagent is used to identify aldehydes and ketones.
Aldehydes give a silver mirror with Tollen's reagent.

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Description

Test your knowledge of practical examination viva questions related to functional groups like alcohol, phenol, aldehydes, ketones, carboxylic acids, primary amines and their respective tests such as Ceric ammonium nitrate test, Lucas test, 2,4-DNPH test, and more.