Aldehydes Ketones And Carboxylic Acids Test

Aldehydes Ketones And Carboxylic Acids

This is aldehydes ketones and carboxylic acids Test-03 for CBSE class 12 Chemistry.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
The incorrect IUPAC name is
  • A
    Option A
  • B
    Option B
  • C
    Option C
  • D
    Option D
    Correct
2
One mole of a symmetrical alkane on ozonolysis gives two moles of an aldehyde having molecular mass of 44u. The alkene is.
  • A
    Propene
  • B
    Ethene
  • C
    2 – butene
    Correct
  • D
    1 – butene
3
The compound formed as a result of oxidation of ethyl benzene by $KMnO_4$ is
  • A
    Benzophenone
  • B
    Benzoic acid
    Correct
  • C
    Benzyl alcohol
  • D
    Acetophenone
4
Ketones are reduced to the corresponding alcohols by catalytic hydrogenation to form
  • A
    primary alcohols
  • B
    None of these
  • C
    tertiary alcohols
  • D
    secondary alcohols
    Correct
5
Which of the following is correct?
  • A
    Sucrose on reaction with NaCl give invert sugar
  • B
    $C_2H_5OH$, iodine with NaOH gives iodoform
    Correct
  • C
    Any aldehyde gives secondary alcohol on reduction
  • D
    Reaction of vegetable oil with H_2SO_4 gives glycerine
6
Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called
  • A
    Cope reduction
  • B
    Wolff – Kishner reduction
  • C
    Dow reduction
  • D
    Clemmensen reduction
    Correct
7
The appropriate reagent for the transformation:
Question 7 figure 1
  • A
    $NaBH_4$
  • B
    Zn (Hg), HCl
  • C
    $NH_2NH_2, OH^ –$
    Correct
  • D
    $H_2$, Ni
8
A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives
  • A
    benzyl alcohol and methyl alcohol
  • B
    benzyl alcohol and sodium formate
    Correct
  • C
    sodium benzoate and methyl alcohol
  • D
    sodium benzoate and sodium formate
9
Which of the following has most acidic hydrogen?
  • A
    2, 4 – Hexanedione
    Correct
  • B
    3 – Hexanone
  • C
    2, 3 – Hexanedione
  • D
    2, 5 – Hexanedione
10
Clemmensen reduction of a ketone is carried out in the presence of which of the following?
  • A
    Zn – Hg with HCl
    Correct
  • B
    $LiAlH_4$
  • C
    Glycol with KOH
  • D
    $H_2$ and Pt as catalyst
11
Which of the following statements is not correct?
  • A
    Aldehydes and ketones undergo nucleophilic addition.
  • B
    Aldehydes and ketones undergo electrophilic substitution
    Correct
  • C
    Lower members of aldehydes and ketones are soluble in water due to hydrogen bonding
  • D
    Aldehydes and ketones contain polar carbonyl group
12
In Hell – Volhard Zelinsky reaction, halogen reacts with
  • A
    carboxylic acids
    Correct
  • B
    ethers
  • C
    ketones
  • D
    aldehydes
13
In Hell – Volhard Zelinsky reaction, the reagents used are
  • A
    $Cl_2$ or $Br_2$in the presence of red phosphorus
    Correct
  • B
    NaOH
  • C
    $LiAlH_4$
  • D
    CaOH
14
The following reaction is
Question 14 figure 1
  • A
    catalytic hydrogenation
  • B
    Wolff – Kushner reduction
    Correct
  • C
    None of these
  • D
    Clemens reduction
15
Compound 'A' undergoes formation of cyanohydrins which on hydrolysis gives lactic acid ($CH_3$CHOHCOOH). Therefore, compound 'A' is
  • A
    formaldehyde
  • B
    benzaldehyde
  • C
    acetone
  • D
    acetaldehyde
    Correct