Free MCQs & Online Quiz Practice for Exams

Q: Select the statement which is not true about carbonyl group? (ETEA 2012)

A) The three atoms attached to the carbonyl carbon are not in the same plane

B) The carbon in carbonyl group is Sp2 hybridized

C) The bond angles around carbon attached to three atoms are approximately 1200

D) The carbonyl group forms resonating structure

Q: Acetaldehyde on oxidation by Na2Cr2O7/H2SO4 gives (ETEA 2012)

A) CH3COOH

B) C2H5OH

C) OHC.CHO

D) None

Q: Carbon atom in carbonyl is (ETEA 2012)

A) Sp hybridized

B) Sp2 hybridized

C) Sp3 hybridized

D) None

Q: All of the following tests are used to identify aldehyde except (ETEA 2013)

A) Tollen's test

B) Fehling test

C) Benedict test

D) Baeyer's test

Q: Which of the following reagents may not be used for the oxidation of aldehydes and ketones to carboxylic acids? (ETEA 2013)

A) LiAlH4

B) KMnO4

C) K2Cr2O7

D) Na2Cr2O2

Q: Which of the following will give a positive test with Fehling solution? (ETEA 2013)

A) Acetic acid

B) Ethyl acetate

C) Formaldehyde

D) Acetone

Q: Which of the following reagents may not be used for the oxidation of aldehydes and ketones? (ETEA 2013)

A) LiAlH4

B) KMnO4

C) K2Cr2O7

D) Na2Cr2O2

Q: Reduction of acetaldehyde with H2/Ni gives (ETEA 2014)

A) Ethanol

B) Ethanoic acid

C) Ethane

D) Ethylene

Q: The reduction of aldehydes and ketones in the presence of zinc amalgam and HCl is termed as (ETEA 2015)

A) Grignard reduction

B) Clemmenson reduction

C) Wolff-Kishner reduction

D) Friedel-Craft reduction

Q: Hemiacetal containing both (ETEA 2015)

A) Alcohol and aldehyde functional groups

B) Alcohol and ether functional groups

C) Aldehyde and ether functional groups

D) Alcohol and carboxylic acid functional groups

Q: Select the tests used for the estimation of glucose in blood and urine? (ETEA 2015)

A) Tollen's reagent test

B) Fehling's solution test

C) Benedict's solution test

D) All of the above

Q: The oxidation of pent-2-one (2-pentanone) with nascent oxygen gives (ETEA 2017)

A) Propanal

B) Propanoic acid

C) Ethanoic acid

D) Pentanoic acid

Q: Silver mirror test is given by (ETEA 2017)

A) Aldehyde

B) Ketone

C) Ethers

D) Acid

Q: Addition of HCN to acetone forms cyanohydrin. It is an example of (ETEA 2019)

A) Electrophilic addition reaction

B) Nucleophile addition reaction

C) Electrophilic

D) Nucleophile substitution reaction

Q: Which one is more reactive? (ETEA 2019)

A) HCHO

B) CH3CHO

C) (CH3)2CO

D) Have equal reactivity

Q: Aldehydes are reducing agents. In the reaction with Fehling's solution they reduce (ETEA 2019)

A) Cu+2 ions

B) Ag+ ions

C) NaOH

D) Na

Q: Which of the following reagent will convert acetic acid into acetyl chloride? (ETEA 2012)

A) NaCl

B) HCl/ZnCl2

C) SOCl2

D) Hg

Q: Methanoic acid HCOOH has one C-O bond of length 123 pm and another of 136 pm. The C=O and C-O bond lengths respectively would be: (ETEA 2012)

A) 136pm,123pm

B) 123pm,136pm

C) 136pm, 136pm

D) 123pm,123pm

Q: Which of the following statement is false about acetic acid? (ETEA 2012)

A) Acetic acid is stronger acid than monochloro-acetic acid

B) Acetic acid is weaker acid than trichloro-acetic acid

C) Acetic acid is weaker acid than formic acid

D) Acetic acid is weaker acid than hydrochloric acid

Q: Which of the following is NOT correct in case of carboxylic acids? (ETEA 2013)

A) They are polar molecules

B) They form H-bonds

C) They are stronger than mineral acids

D) They have higher boiling point than corresponding alcohols