Organic Chemistry Some Basic Principles CBSE Questions & Answers

Organic Chemistry Some Basic Principles

This is Chemistry Class 11 Organic Chemistry Some Basic Principles CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

Correct IUPAC name the following compound is

A
2, 3-dimethylbutane
B
2-sec-butylbutane
C
3,4- dimethylhexane
Correct
D
2- ethyl-3-methylpentane

Benzene and other related ring compounds (benzenoid) such as given below are called:

A
Alicyclic compounds
B
Heterocyclic compounds
C
Aromatic compounds
Correct
D
Aliphatic compounds

The following compound is called

A
Tropolone
Correct
B
Oxy cyclohextane
C
Aliphatic compounds
D
Heterocyclic compound

Compounds contain carbon atoms joined in the form of a ring are called

A
Alicyclic compounds
Correct
B
Aromatic compounds
C
Aliphatic compounds
D
Heterocyclic compounds

The molecular formula \({{\text{C}}_{\text{3}}}{{\text{H}}_{\text{8}}}{\text{O}}\) represents two alcohols: propan-1-ol and propan-2-ol. This property is called

A
Metamerism
B
Position isomerism
Correct
C
Functional group isomerism
D
Chain isomerism

What is the correct order of decreasing stability of the following cations.

A
I > II > III
B
II > I > III
Correct
C
II > III > I
D
III > I > II

What is the type of hybridisation of each carbon in the compound \({\left( {{\text{C}}{{\text{H}}_{\text{3}}}} \right)_{\text{2}}}{\text{CO}}?\)

A
\({\text{s}}{{\text{p}}^{\text{3}}},{\text{ sp}}\)
B
sp2
C
\({\text{s}}{{\text{p}}^{\text{3}}},{\text{ s}}{{\text{p}}^{\text{2}}}\)
Correct
D
\({\text{s}}{{\text{p}}^{\text{3}}}\)

Alkyl radical (Methyl, Ethyl, Isopropyl, Tert-butyl free radical) stability in the increasing order is:

A
\(\dot C{{\text{H}}_{\text{3}}} < {{\text{H}}_{\text{2}}}{\text{C}}{{\text{H}}_{\text{3}}} < {\text{H }}{\left( {{\text{C}}{{\text{H}}_{\text{3}}}} \right)_{\text{2}}} < \dot C{\left( {{\text{C}}{{\text{H}}_{\text{3}}}} \right)_{\text{2}}}\)
Correct
B
\(\dot CH {\left( {{\text{C}}{{\text{H}}_{\text{3}}}} \right)_{\text{2}}} < \dot C{\left( {{\text{C}}{{\text{H}}_{\text{3}}}} \right)_{\text{2}}} < \dot C{{\text{H}}_{\text{3}}} < \dot C{{\text{H}}_{\text{2}}}{\text{C}}{{\text{H}}_{\text{3}}}\)
C
\(\dot C{\left( {{\text{C}}{{\text{H}}_{\text{3}}}} \right)_{\text{2}}} < \dot C{{\text{H}}_{\text{3}}} < \dot C{{\text{H}}_{\text{2}}}{\text{C}}{{\text{H}}_{\text{3}}} <\dot CH {\left( {{\text{C}}{{\text{H}}_{\text{3}}}} \right)_{\text{2}}}\)
D
\(\dot C{{\text{H}}_{\text{2}}}{\text{C}}{{\text{H}}_{\text{3}}} < \dot CH {\left( {{\text{C}}{{\text{H}}_{\text{3}}}} \right)_{\text{2}}} < \dot C{\left( {{\text{C}}{{\text{H}}_{\text{3}}}} \right)_{\text{2}}} < \dot C{{\text{H}}_{\text{3}}}\)

The nitrogen containing organic compound, when heated with copper oxide in an atmosphere of carbon dioxide, yields:

A
Only carbon dioxide and water
B
free nitrogen
Correct
C
ammonium sulphate
D
ammonia

A known mass of an organic compound is heated with fuming nitric acid in the presence of silver nitrate is:

A
Feulgen method
B
Carius method
Correct
C
Dumas method
D
Kjeldahl method

Carius tube is used in the estimations of one of the following

A
sulphur and nitrogen
B
halogen and nitrogen
C
sulphur and oxygen
D
halogen and sulphur
Correct

In the naming of organic compounds containing polyfunctional compounds, one of the functional groups is chosen as the principal functional group and the compound is then named on that basis. The order of decreasing priority for some functional groups is:

A
\( - {\text{HC}} = {\text{O}},{\text{ }} > {\text{C}} = {\text{O}},{\text{ }} - {\text{OH}},{\text{ }} - {\text{N}}{{\text{H}}_{\text{2}}},{\text{ }} > {\text{C}} = {\text{C}} < , - {\text{C}} \equiv {\text{C}} - {\text{ }},{\text{ }}--{\text{CON}}{{\text{H}}_{\text{2}}},{\text{ }} - {\text{CN}}\)
B
\( - {\text{CN}}, - {\text{HC}} = {\text{O}},{\text{ }} > {\text{C}} = {\text{O}},{\text{ }} - {\text{OH}},{\text{ }} - {\text{N}}{{\text{H}}_{\text{2}}},{\text{ }} > {\text{C}} = {\text{C}} < , - {\text{C}} \equiv {\text{C}} - {\text{ }},{\text{ }}--{\text{CON}}{{\text{H}}_{\text{2}}}\)
C
\(--{\text{CON}}{{\text{H}}_{\text{2}}}, - {\text{CN}}, - {\text{HC}} = {\text{O}}, > {\text{C}} = {\text{O}}, - {\text{OH}}, - {\text{N}}{{\text{H}}_{\text{2}}}, > {\text{C}} = {\text{C}} < , - {\text{C}} \equiv {\text{C}} - \)
Correct
D
\( - {\text{C}} = {\text{O}},{\text{ }} - {\text{OH}},{\text{ }} - {\text{N}}{{\text{H}}_{\text{2}}},{\text{ }} > {\text{C}} = {\text{C}} < , - {\text{C}} \equiv {\text{C}} - {\text{ }},{\text{ }}--{\text{CON}}{{\text{H}}_{\text{2}}},{\text{ }} - {\text{CN }} > {\text{ }} - {\text{HC}} = {\text{O}}\)

If an –\([{\text{N}}{{\text{H}}_{\text{2}}}\) functional group is present in an organic compound it is called amine. If a \( - {\text{CON}}{{\text{H}}_{\text{2}}}\) functional group is present in an organic compound then it is called

A
amide
Correct
B
ether
C
ester
D
nitrile

A covalent bond when cleaved heterolytically yields:

A
carbonium ion
Correct
B
carbanions
C
a sextet electronic structured atom with a negative charge
D
free radicals

Electronegativity of carbon atoms depends upon their state of hybridisation. In which of the following compounds, the carbon marked with asterisk is most electronegative?

A
\({\text{C}}{{\text{H}}_{\text{3}}}--{\text{ }}*{\text{CH }} = {\text{ CH }}--{\text{ C}}{{\text{H}}_{\text{3}}}\)
B
\({\text{C}}{{\text{H}}_{\text{3}}}--{\text{ C}}{{\text{H}}_{\text{2}}}--{\text{ }}*{\text{C}}{{\text{H}}_{\text{2}}}--{\text{ C}}{{\text{H}}_{\text{3}}}\)
Correct
C
\({\text{C}}{{\text{H}}_{\text{3}}}--{\text{ C}}{{\text{H}}_{\text{2}}}--{\text{ C }} \equiv {\text{ }}*{\text{CH}}\)
D
\({\text{C}}{{\text{H}}_{\text{3}}}--{\text{ C}}{{\text{H}}_{\text{2}}}--{\text{ CH }} = {\text{ }}*{\text{C}}{{\text{H}}_{\text{2}}}\)