NEET-UG and JEE Main Chemistry · Class 12
Preparation of acetanilide, p-nitroacetanilide and aspirin — NEET & JEE Questions
Preparation of acetanilide, p-nitroacetanilide and aspirin is a topic in Principles Related to Practical Chemistry, a Class 12 Chemistry chapter of the NEET-UG and JEE Main syllabus. TestBudy holds 13 published NEET-UG and JEE Main questions on Preparation of acetanilide, p-nitroacetanilide and aspirin, each with the marking scheme of the real paper.
- questions
- 13
- shown here
- 10
Five free tests with an account. Your score comes with the result; where you stand is Pro.
Preparation of acetanilide, p-nitroacetanilide and aspirin MCQs with solutions
10 of the 13 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
Acetanilide is commonly prepared in the laboratory by acetylation of which compound?
- A. Phenol
- B. Aniline
- C. Benzoic acid
- D. Benzaldehyde
Aspirin is formed when salicylic acid is acetylated. Which group of salicylic acid is acetylated in the product?
- A. The phenolic hydroxyl group
- B. The aromatic ring is completely hydrogenated
- C. The carboxyl carbon is removed as carbon dioxide
- D. The benzene ring is cleaved into two fragments
Why is aniline often converted to acetanilide before carrying out controlled nitration?
- A. The acetamide group becomes a meta-directing nitro group
- B. Acetylation removes the benzene ring before nitration
- C. It moderates amino-group activation during nitration
- D. Acetanilide cannot undergo electrophilic substitution
Acetanilide is prepared in the laboratory by acetylation of
- A. aniline
- B. phenol
- C. benzoic acid
- D. ethanol
Aspirin is acetylsalicylic acid and is commonly prepared by acetylating
- A. salicylic acid
- B. benzoic acid
- C. aniline
- D. phenol only
In the preparation of p-nitroacetanilide from acetanilide, which reaction introduces the nitro group?
- A. Hydrolysis of the acetamide group
- B. Nucleophilic substitution at the carbonyl carbon
- C. Free-radical addition across a double bond
- D. Electrophilic aromatic nitration
During purification of a crude organic solid such as acetanilide, which technique is commonly used when the compound is much more soluble in hot solvent than in cold solvent?
- A. Recrystallisation
- B. Simple filtration without dissolving
- C. Electrolysis
- D. Gas chromatography only
Why is p-nitroacetanilide often obtained by nitration of acetanilide rather than direct vigorous nitration of aniline?
- A. Acetylation moderates the activating effect of the amino group and helps control substitution
- B. The acetamide group makes the ring completely unreactive
- C. Aniline cannot undergo electrophilic substitution
- D. Acetylation removes nitrogen from the molecule
A student cools a hot saturated solution of crude acetanilide and crystals separate. Why are many soluble impurities left behind?
- A. They remain more soluble in the cold mother liquor than the desired crystals
- B. All impurities evaporate completely
- C. Impurities become gases during cooling
- D. Crystallisation converts impurities into acetanilide
In aspirin preparation, the product is washed with a small amount of cold water rather than a large amount of hot water mainly to
- A. remove soluble impurities while minimising product loss by dissolution
- B. increase aspirin solubility as much as possible
- C. hydrolyse all aspirin back to salicylic acid
- D. prevent any filtration
Common mistakes in Preparation of acetanilide, p-nitroacetanilide and aspirin
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Using excess hot solvent, which can keep too much product dissolved after cooling.
- Interprets a broad depressed melting range as evidence of high purity.
- Assumes reaction completion guarantees quantitative isolated yield.
Practise this chapter
Reading a question and answering it under a clock are different things. A chapter-length test measures whether the topic went in.