Homologous Series - Isomerism - Structural and Stereoisomerism NEET Questions

Organic Chemistry - Some Basic Principles of Organic Chemistry

Homologous Series - Isomerism - Structural and Stereoisomerism MCQ Questions


1.
A homologous series is characterized by:
A.
Same molecular formula but different structures
B.
Members differing by a –CH₂ unit and having the same general formula
C.
Same physical properties throughout
D.
Different functional groups in each member
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ANSWER :
B. Members differing by a –CH₂ unit and having the same general formula
2.
Which of the following is the general formula for alkanes?
A.
CₙH₂ₙ₋₂
B.
CₙH₂ₙ
C.
CₙH₂ₙ₊₂
D.
CₙH₂ₙ₊₁
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ANSWER :
C. CₙH₂ₙ₊₂
3.
The general formula for alkenes (with one double bond) is:
A.
CₙH₂ₙ₊₂
B.
CₙH₂ₙ
C.
CₙH₂ₙ₋₂
D.
CₙH₂ₙ₋₆
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ANSWER :
B. CₙH₂ₙ
4.
Which of the following pairs are homologues?
A.
CH₃OH and CH₃OCH₃
B.
CH₃CHO and CH₃COCH₃
C.
C₂H₅OH and C₃H₇OH
D.
CH₃COOH and HCOOCH₃
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ANSWER :
C. C₂H₅OH and C₃H₇OH
5.
The molecular mass difference between two consecutive members of a homologous series is:
A.
14 u
B.
12 u
C.
16 u
D.
28 u
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ANSWER :
A. 14 u
6.
Which of the following statements is NOT true for a homologous series?
A.
All members have the same general formula
B.
All members have similar chemical properties
C.
Successive members differ by a –CH₂ unit
D.
All members have identical physical properties
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ANSWER :
D. All members have identical physical properties