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Free download in PDF Organic Chemistry Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like UPSC, NDA, SSC etc. These short solved questions or quizzes are provided by Gkseries./p>
(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
(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
(4)
Pyridine is a not a planner compound?
(5)
How many number of resonating structure stabilises a pyridine molecule?
(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°
(8)
What is the dipole moment of the pyridine?
[A]
Zero
[B]
2.2 D
[C]
1.17 D
[D]
4.3 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°
(10)
What is the greatest angle in pyridine ring?
[A]
116°
[B]
140°
[C]
124°
[D]
118°
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