Atomos Test Generator Free PYQs ExamsMy practice Log in / Sign up free

Aldehydes, Ketones and Carboxylic Acids

AIPMT 2012 (Prelims)MCQEasy📈 Topic in 12% papers+4−1
Ques. 1AIPMT 2012 (Prelims)

CH3CHO and C6H5CH2CHO can be distinguished chemically by

  1. Benedict's test
  2. Iodoform test
  3. Tollens' reagent test
  4. Fehling's solution test

Answer

(2) Iodoform test

Solution

Both are aldehydes with α-hydrogens, so both reduce Tollens' reagent, Fehling's solution and Benedict's solution.

As per NCERT, compounds having a CH3CO- group (methyl ketones and acetaldehyde) give the iodoform test.

CH3CHO+3I2+4NaOH CHI3 (yellow)+HCOONa+3NaI+3H2O

C6H5CH2CHO has no CH3CO- group no iodoform.

Answer: (2)

Keep practising — Aldehydes, Ketones and Carboxylic Acids

Ques. 2AIPMT 2012 (Prelims)

The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D) is

  1. B > A > D > C
  2. B > D > C > A
  3. A > B > C > D
  4. A > C > B > D
Ques. 3AIPMT 2012 (Prelims)

Predict the products in the given reaction. [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 4AIPMT 2012 (Prelims)

Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 5AIPMT 2011 (Mains)

The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds: [figure]

  1. III > II > I
  2. II > I > III
  3. I > III > II
  4. I > II > III
Ques. 6AIPMT 2011 (Prelims)

Clemmensen reduction of a ketone is carried out in the presence of which of the following?

  1. Glycol with KOH
  2. Zn-Hg with HCl
  3. LiAlH4
  4. H2 and Pt as catalyst
Ques. 7AIPMT 2010 (Mains)

Following compounds are given (i) CH3CH2OH (ii) CH3COCH3 (iii) CH3- CH3 |CHOH (iv) CH3OH Which of the above compound(s), on being warmed with iodine solution and NaOH, will give iodoform?

  1. (i), (iii) and (iv)
  2. Only (ii)
  3. (i), (ii) and (iii)
  4. (i) and (ii)
Ques. 8AIPMT 2010 (Mains)

Which one of the following compounds will be most readily dehydrated?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 9AIPMT 2010 (Prelims)

In a set of reactions, ethylbenzene yielded a product D. [figure] D would be

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 10AIPMT 2010 (Prelims)

Which of the following reactions will not result in the formation of carbon-carbon bonds?

  1. Reimer-Tiemann reaction
  2. Cannizzaro reaction
  3. Wurtz reaction
  4. Friedel-Crafts acylation
Ques. 11AIPMT 2010 (Prelims)

Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

  1. CH3COOCH3
  2. CH3CONH2
  3. CH3COOCOCH3
  4. CH3COCl

All Aldehydes, Ketones and Carboxylic Acids PYQs →

PDFDownload Aldehydes, Ketones and Carboxylic Acids PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Chemistry chapters