Organic Chemistry NDA Questions

NDA Chemistry

Organic Chemistry MCQ Questions


1.
What is the valency (combining capacity) of a carbon atom?
A.
Three
B.
Two
C.
Four
D.
Six
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ANSWER :
C. Four
2.
The property of carbon atoms to link with other carbon atoms through covalent bonds, forming long chains, branched chains and rings, is called:
A.
Polymerisation
B.
Isomerism
C.
Catenation
D.
Allotropy
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ANSWER :
C. Catenation
3.
Why does carbon form covalent bonds rather than ionic bonds with most elements?
A.
It has a very large atomic radius
B.
It is a metal
C.
It has very low electronegativity
D.
It has 4 electrons in its valence shell, making gain/loss of electrons energetically unfavourable
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ANSWER :
D. It has 4 electrons in its valence shell, making gain/loss of electrons energetically unfavourable
4.
Which of the following elements shows the property of catenation to the greatest extent?
A.
Carbon
B.
Nitrogen
C.
Silicon
D.
Sulphur
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ANSWER :
A. Carbon
5.
A covalent bond formed by sharing of two electron pairs between two carbon atoms is called a:
A.
Triple bond
B.
Ionic bond
C.
Single bond
D.
Double bond
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ANSWER :
D. Double bond
6.
The large number of organic compounds is mainly attributed to which two properties of carbon?
A.
Catenation and tetravalency
B.
Density and malleability
C.
Radioactivity and fluorescence
D.
Metallic character and lustre
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ANSWER :
A. Catenation and tetravalency