Basics of Organic Chemistry AFCAT Questions

AFCAT Chemistry

Basics of Organic Chemistry MCQ Questions


13.

The shape of ethene (C2H4) molecule is:

A.

Pyramidal

B.

Tetrahedral

C.

Planar

D.

Linear

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ANSWER :

C. Planar

14.

Which of the following is the simplest alkene?

A.

Propene (C3H6)

B.

Butene (C4H8)

C.

Methene (CH2)

D.

Ethene (C2H4)

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ANSWER :

D. Ethene (C2H4)

15.
In a pi (Ï€) bond, the overlap between p-orbitals is:
A.
Sideways/Lateral
B.
End-to-end
C.
Linear
D.
Axial
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ANSWER :
A. Sideways/Lateral
16.
Why is rotation restricted around a C=C double bond?
A.
Because of resonance
B.
Because rotation breaks the pi-bond overlap
C.
Due to steric hindrance
D.
Because of strong sigma bond
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ANSWER :
B. Because rotation breaks the pi-bond overlap
17.

The IUPAC name of CH2=CHCH2CH3 is:

A.

But-2-ene

B.

Butane

C.

But-3-ene

D.

But-1-ene

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ANSWER :

D. But-1-ene

18.
Geometrical isomerism is exhibited by:
A.
Alkanes
B.
Cycloalkanes only
C.
Alkenes
D.
Alkynes
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ANSWER :
C. Alkenes