Aldehydes Ketones And Carboxylic Acids Test

Aldehydes Ketones And Carboxylic Acids

This is aldehydes ketones and carboxylic acids Test-04 for CBSE class 12 Chemistry.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which sequence of steps below describes the best synthesis of 5 – oxohexanoic acid starting with 1 – methylcyclopentan – 1 – ol
  • A
    Option A
  • B
    Option B
  • C
    Option C
    Correct
  • D
    Option D
2
The compound which forms acetaldehyde when heated with dilute NaOH is
  • A
    1, 1, 1 trichloro ethane
  • B
    1, 2 dichloro ethane
  • C
    1, 1 dichloro ethane
    Correct
  • D
    1 chloro ethane
3
For making distinction between 2 – pentanone and 3 – pentanone the reagent to be employed is
  • A
    Iodine/NaOH
    Correct
  • B
    Zn – Hg/HCl
  • C
    $SeO_2$
  • D
    $K_2Cr_2O_7$/$H_2SO_4$
4
A strong base can abstract an α – hydrogen from
  • A
    Amine
  • B
    Alkane.
  • C
    Alkene
  • D
    Ketone
    Correct
5
The product formed in Aldol condensation is
  • A
    a beta – hydroxy aldehyde or a beta – hydroxy ketone.
    Correct
  • B
    an alpha, beta unsaturated ester
  • C
    a beta – hydroxy acid
  • D
    an alpha – hydroxy aldehyde or ketone.
6
Which of the following reagents can be used to convert a carboxylic acid directly into its corresponding acid chloride derivative?
  • A
    $CH_3COCl$
  • B
    HCl
  • C
    NaOCl
  • D
    $(COCl)_2$
    Correct
7
What compound is produced when cyclohexene is treated with concentrated KMnO4?
  • A
    cyclohexanecarboxylic acid
  • B
    hexanoic acid
  • C
    adipic acid
    Correct
  • D
    succinic acid
8
The combination of a carbonyl group and a hydroxyl group on the same carbon atom is called a __________ group.
  • A
    carboxylate
  • B
    carbonate
  • C
    carbomate
  • D
    carboxyl
    Correct
9
The common name for pentanedioic acid is:
  • A
    oxalic acid
  • B
    pimelic acid
  • C
    succinic acid
  • D
    glutaric acid
    Correct
10
In the propanoate ion
  • A
    one of the oxygen atoms bears a – 1 charge
  • B
    both the carbon – oxygen bonds are the same length.
    Correct
  • C
    the carbon – oxygen double bond is shorter.
  • D
    the carbon atom bears a – 1 charge.
11
What compound is produced when $(CH_3)_2$$CHCH_2Br$ is subjected to the following sequence of steps: 1. Mg, $Et_2O$, 2. $CO_2$, 3. $H_3O^+$?
  • A
    2 – methylhexanoic acid
  • B
    2 – methylpropanoic acid
  • C
    3 – methylbutanoic acid
    Correct
  • D
    3 – methylpropanoic acid
12
Many naturally occurring aldehydes and ketones are used in the blending of perfumes and flavouring agents. But the preferred ones are
  • A
    lower aldehydes
  • B
    higher aldehydes
    Correct
  • C
    higher ketones
  • D
    lower ketones
13
In perfumes, the fragrance of the aldehyde and ketone used for perfume and similar uses depend on
  • A
    Only solubility of aldehydes and ketones
  • B
    moisture of the air
  • C
    on its reactivity with other functional groups
  • D
    size and solubility of the aldehyde and ketone molecule
    Correct
14
IUPAC name of $CH_3CHO$ is
  • A
    None of the above
  • B
    Acetaldehyde
  • C
    Ethanal
    Correct
  • D
    Formaldehyde
15
Benzaldehyde and acetone can be best distinguished using
  • A
    Tollen's reagent
    Correct
  • B
    hydrazine
  • C
    sodium hydroxide solution
  • D
    2, 4 – DNP