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Test: General Study of Carbonyl Compounds


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10 Questions MCQ Test Chemistry Class 12 | Test: General Study of Carbonyl Compounds

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Test: General Study of Carbonyl Compounds - Question 1

Which of the following statements are correct in case of the carbonyl bond between carbon and oxygen?

Detailed Solution for Test: General Study of Carbonyl Compounds - Question 1

In carbonyl bonds b/w O and C, C is electrophilic centre(centre which needs electron as it is deficient in it) and O is nucleophilic centre(centre which needs +ve charge as it has excess charge).  Also, C=O bond is polarised with O having partial negative charge and C having partial positive charge.

Test: General Study of Carbonyl Compounds - Question 2

How many structural isomers can compound with molecular formula ‘C3H6O’ have?

Detailed Solution for Test: General Study of Carbonyl Compounds - Question 2

The Isomers of C3H6O include:

Hence we can see that a total of 11 isomers of C3H6O are possible.

Test: General Study of Carbonyl Compounds - Question 3

What is the common name of 2-methyl-propanal?

Detailed Solution for Test: General Study of Carbonyl Compounds - Question 3
  • Isobutyraldehyde is the chemical compound with the formula (CH₃)₂CHCHO.
  • It is an aldehyde, isomeric with n-butyraldehyde.
  • Isobutyraldehyde is manufactured, often as a side-product, by the hydroformylation of propene. Its odour is described as that of wet cereal or straw.
Test: General Study of Carbonyl Compounds - Question 4

Write the IUPAC name of (CH3)2CHCHO?

Detailed Solution for Test: General Study of Carbonyl Compounds - Question 4

The IUPAC name of (CH3)2CHCHO is 2-methylpropanal and its chemical name is Isobutyraldehyde.

Test: General Study of Carbonyl Compounds - Question 5

Carbonyl compounds when oxidized easily to form carboxylic group involves

Detailed Solution for Test: General Study of Carbonyl Compounds - Question 5

AlcoholWhat Is the OH Functional Group Called? is the group in which (carbonyl) group is not present. Aldehydes, ketones and carboxylic acids all have a carbonyl group present in them. Aldehydes have group, ketones have a group and carboxylic acids have a group.

Hence A is correct.

Test: General Study of Carbonyl Compounds - Question 6

Acetone and Propanal are

Detailed Solution for Test: General Study of Carbonyl Compounds - Question 6

Acetone (CH3COCH3) and Propanal (CH3CH2CHO) are functional isomers.

  • Acetone:
    Acetone Laboratory Reagent, >= 99.5 % | 67-64-1 | Sigma-Aldrich
  • Propanal:
Test: General Study of Carbonyl Compounds - Question 7

The IUPAC name of CH3CHO is:

Detailed Solution for Test: General Study of Carbonyl Compounds - Question 7
  • The functional group is an aldehyde; −CHO and the given compound has two carbon atoms.
  • Thus, the IUPAC name of the compound is ethanal.
    Ethanal Structure (Page 1) - Line.17QQ.com
Test: General Study of Carbonyl Compounds - Question 8

What is the IUPAC name of Acrolein?

Detailed Solution for Test: General Study of Carbonyl Compounds - Question 8

IUPAC name of acrolein is prop-2-enal, a name derived from that of acrylic acid, the parent carboxylic acid.
Acrolein hydroquinone - stabilizer, 90 % | 107-02-8 | Sigma-Aldrich

Test: General Study of Carbonyl Compounds - Question 9

 Which of the following statement about C=O and C=C is correct?

Detailed Solution for Test: General Study of Carbonyl Compounds - Question 9
  • The first bond formed is a sigma bind and the second one is a pi bond.
  • O has a higher electronegativity than C and hence the electron cloud will be shifted towards the O atom, making the compound polar.
  • This is not possible in C=C.
Test: General Study of Carbonyl Compounds - Question 10

Propanone and prop-2-en-1-ol are examples of which type of isomerism?

Detailed Solution for Test: General Study of Carbonyl Compounds - Question 10
  • Isomerism:

  • The compounds having the same molecular formula, which differ in at least some physical or chemical properties, are known as isomers and the phenomenon is said to be isomerism.
  • The different types of isomerism are chain isomerism, position isomerism, and functional isomerism.
  • The chain isomerism is due to the arrangement of carbon atoms so the size of the parent chain or the size of the side chain must be different.
  • The position isomerism is due to different locant numbers of functional groups or multiple bonds or side chains along the same parent chain.
  • Functional isomerism is due to the presence of different functional groups.
  • Prop-2-en-1-ol is an organic compound that contains three Carbon atoms and one alcohol group.
  • That is, both Propanone and prop-2-en-1-ol are having same molecular formula but different structural formulas.
  • Both Propanone and prop-2-en-1-ol contain different functional groups, that is they are functional isomers.

Therefore, Propanone and prop-2-en-1-ol are examples of functional isomers.

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