DIFF.MDCAT
Chemistry · Unit 33529 Practice MCQs in Bank

MDCAT Aldehydes and Ketones MCQs

Customize your practice drill: select target topics, configure your question limit (up to 180 MCQs per test), and choose your mode.

Total Topics

4

Selected Topics

4

Available MCQs

529

Question Limit

Up to 180

Select Topics to Practice

Questions will be drawn only from checked topics.

Test Configuration

Configure question count (limit 180) and testing mode.

50 / 180 MCQs

Selected topics have 529 total questions. Test will draw 50 shuffled MCQs.

All Syllabus Notes

Sample Aldehydes and Ketones MCQs with answers

Try these questions, then open the answer to check your reasoning. Use the quiz above for more topics and a complete review.

  1. Carbonyl Basics

    1. Acetaldehyde in the presence of Conc.H2SO4 undergoes ______ ?

    1. A. Dehydration
    2. B. Polymerization
    3. C. Aldol Condensation
    4. D. Oxidation reaction
    View answer and explanation

    Answer: B. Polymerization

    Concentrated H2SO4 polymerizes acetaldehyde to paraldehyde (trimer) and metaldehyde (tetramer). It does not dehydrate or oxidize it here. Hence polymerization is correct.

  2. Nucleophilic Addition

    2. Why is a small amount of KCN or NaCN often used with HCN in cyanohydrin formation?

    1. A. It removes the carbonyl oxygen
    2. B. It oxidises the aldehyde
    3. C. It converts HCN into an electrophile
    4. D. It supplies CN−, the effective nucleophile
    View answer and explanation

    Answer: D. It supplies CN−, the effective nucleophile

    It supplies CN−, the effective nucleophile is correct. CN− attacks the electrophilic carbonyl carbon, and protonation of the resulting alkoxide forms a cyanohydrin bearing –OH and –CN.

  3. Carbonyl Redox

    3. Which of the following gives a silver mirror with Tollens reagent?

    1. A. Acetone
    2. B. Propanal
    3. C. Diethyl ether
    4. D. Methanol
    View answer and explanation

    Answer: B. Propanal

    Tollens reagent oxidises aldehydes to carboxylates and reduces Ag+ to metallic silver. Propanal (CH3CH2CHO) is an aldehyde; acetone is a ketone, ether is non-reactive, and methanol is an alcohol.

About this unit

MDCAT Aldehydes and Ketones — Unit 33

529 practice MCQs covering Carbonyl Basics, Carbonyl Preparation, Nucleophilic Addition, Carbonyl Redox. Select custom topics and sit tailored tests up to 180 questions per drill.

Common questions about Aldehydes and Ketones practice

How many Aldehydes and Ketones MCQs are available on DIFF. MDCAT?

The current Aldehydes and Ketones question bank contains 529 practice MCQs across 4 topics. This is the bank size, not the length of one test. Choose your topics and a question count from 1 to 180, limited by the questions available in those topics.

Which topics does the Aldehydes and Ketones quiz cover?

The selectable topics are Carbonyl Basics, Carbonyl Preparation, Nucleophilic Addition, Carbonyl Redox. Use Select all for a broad chapter drill, Clear to start a focused selection, or choose individual topics. Questions are drawn from your chosen topics, so you can target a weak concept before returning to a wider test.

How do I build a custom Aldehydes and Ketones test?

Open the chapter builder, select one or more topics, enter your question count, and choose Tutor Mode or Timed Exam. The available-question total updates with your selection. Start Test generates a shuffled drill; you do not have to follow a fixed Quiz 1 or Quiz 2 sequence.

What is the difference between Tutor Mode and Timed Exam?

Tutor Mode gives feedback and an explanation after you choose an option, and you can change or clear that choice. Timed Exam runs a countdown and keeps explanations hidden until submission. Both modes let you move between questions, use the paper map, and submit for a complete review.

How do I review and download my Aldehydes and Ketones quiz?

Select Submit Quiz, then Submit & View Explanations. The review includes every question in your test, all options, your selection, the marked correct answer when a key is available, and the explanation. Download PDF saves a paginated review; Download Review saves an HTML copy you can open in a browser. The review also includes DIFF. MDCAT community links.

How should I use Aldehydes and Ketones MCQs to improve?

Start with a short tutor drill on one of these topics: Carbonyl Basics, Carbonyl Preparation, Nucleophilic Addition. Read the explanation for incorrect and uncertain answers, revise the relevant textbook section, and retry before taking a timed drill. Compare your reasoning with the answer key rather than memorising the option letter.