Organic Chemistry Questions and Answers – Structure of Pyridine | Organic Chemistry Multiple Choice Questions and Answers

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Questions
1 Pyridine is a which type of heterocyclic compound from the following options?
A Six membered heterocyclic compound
B Seven membered heterocyclic compound
C Four membered heterocyclic compound
D Five membered heterocyclic compound

Answer:Six membered heterocyclic compound
2 Which element is present as hetero atom in pyridine?
A Sulphur
B Nitrogen
C Oxygen
D Sulphur and nitrogen

Answer:Nitrogen
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3 The electron of Nitrogen participating in the resonance in pyridine is present in which orbital?
A p-orbital
B sp2-orbital
C sp3-orbital
D sp -orbital

Answer:sp2-orbital
4 Pyridine is a not a planner compound?
A True
B False

Answer:False
5 How many number of resonating structure stabilises a pyridine molecule?
A 4
B 5
C 6
D 7

Answer:5
6 Pyridine come under which category of heterocycle classification on the basis of chemical behavior?
A -excessive heterocycle
B -deficient heterocycle
C -equivalent heterocycle
D can’t say about the five membered rings

Answer:-deficient heterocycle
7 What is the smallest angle in pyridine ring?
A 116.7°
B 115.0°
C 124.0°
D 118.1°

Answer:116.7°
8 What is the dipole moment of the pyridine?
A Zero
B 2.2 D
C 1.17 D
D 4.3 D

Answer:2.2 D
9 Which of the following is the correct range for the bond length in the pyridine molecule?
A 1.34 – 1.40 A°
B 1.24 – 1.32 A°
C 2.4 – 2.49 A°
D 1.02 – 1.17 A°

Answer:1.34 – 1.40 A°
10 What is the greatest angle in pyridine ring?
A 116°
B 140°
C 124°
D 118°

Answer:124°

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