Chapter Exam

Unit 8: Organic Chemistry — Online MCQ Test

Q: Which halide undergoes nucleophilic substitution most readily in aqueous KOH?

Answer: C. CH3I — Iodide is the best leaving group among halides, so CH3I reacts fastest in nucleophilic substitution.

Q: The functional group present in alcohols is:

Answer: B. -OH — Alcohols contain the hydroxyl group (-OH) attached to a saturated carbon atom.

Q: Which of the following gives positive iodoform test?

Answer: B. Ethanol — Ethanol is oxidized to acetaldehyde under the test conditions and gives the iodoform reaction.

Q: Arrange the following in increasing order of boiling point: CH3OCH3, CH3CH2OH, CH3CHO

Answer: A. CH3OCH3 < CH3CHO < CH3CH2OH — Ethanol has hydrogen bonding, giving the highest boiling point, while ether has the lowest due to lack of intermolecular hydrogen bonding.

Q: In the Reimer-Tiemann reaction, phenol is converted mainly into:

Answer: B. Salicylaldehyde — Phenol reacts with chloroform and base to introduce a formyl group at the ortho position, forming salicylaldehyde.

CHEMISTRY · CLASS 12 INTERMEDIATE 2 YEAR · Telangana State Board

Practice Unit 8: Organic Chemistry with a free chapter-wise online MCQ test for Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR CHEMISTRY. This chapter covers: The final chapter covers haloalkanes haloarenes alcohols phenols ethers aldehydes ketones carboxylic acids organic compounds containing nitrogen reaction mechanisms name reactions.... AI-generated questions from basic to board-exam level, with instant results and explanations.

Questions

20m

Time Limit

Attempts Left

10 random questions from this chapter (mixed difficulty)
Questions you've seen before won't repeat until the pool resets
You have 20 minutes — exam auto-submits when time is up
Maximum 3 attempts per chapter
Results and explanations shown immediately after submission

New here? Register free — includes 3 free chapter exams.

Unit 8: Organic Chemistry — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR CHEMISTRY — Unit 8: Organic Chemistry, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which halide undergoes nucleophilic substitution most readily in aqueous KOH?

A. CH3Cl
B. CH3Br
C. CH3I ✓
D. CH3F

Answer: C. CH3I
Iodide is the best leaving group among halides, so CH3I reacts fastest in nucleophilic substitution.

The functional group present in alcohols is:

A. -CHO
B. -OH ✓
C. -COOH
D. -O-

Answer: B. -OH
Alcohols contain the hydroxyl group (-OH) attached to a saturated carbon atom.

Which of the following gives positive iodoform test?

A. Methanol
B. Ethanol ✓
C. Propanoic acid
D. Benzyl alcohol

Answer: B. Ethanol
Ethanol is oxidized to acetaldehyde under the test conditions and gives the iodoform reaction.

Arrange the following in increasing order of boiling point: CH3OCH3, CH3CH2OH, CH3CHO

A. CH3OCH3 < CH3CHO < CH3CH2OH ✓
B. CH3CHO < CH3OCH3 < CH3CH2OH
C. CH3CH2OH < CH3CHO < CH3OCH3
D. CH3OCH3 < CH3CH2OH < CH3CHO

Answer: A. CH3OCH3 < CH3CHO < CH3CH2OH
Ethanol has hydrogen bonding, giving the highest boiling point, while ether has the lowest due to lack of intermolecular hydrogen bonding.

In the Reimer-Tiemann reaction, phenol is converted mainly into: