Alkynes(Acidic Character: Addition of Hydrogen,...) NEET Questions

Organic Chemistry - Hydrocarbons

Alkynes(Acidic Character: Addition of Hydrogen,...) MCQ Questions


13.
Hydration of ethyne in the presence of H₂SO₄ and HgSO₄ gives:
A.
Acetic acid
B.
Ethanol
C.
Ethanone
D.
Ethanal
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ANSWER :
C. Ethanone
14.
In electrophilic addition reaction, the first attacking species is:
A.
Carbanion
B.
Free radical
C.
Electrophile
D.
Nucleophile
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ANSWER :
C. Electrophile
15.
What is the final product of ethyne polymerization?
A.
Polyethene
B.
Polyacetylene
C.
PVC
D.
Teflon
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ANSWER :
B. Polyacetylene
16.
Which of the following cannot act as an electrophile?
A.
H⁺
B.
Br₂
C.
Cl⁻
D.
SO₃
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ANSWER :
C. Cl⁻
17.
Ethyne reacts with cold dilute KMnO₄ to give:
A.
Oxalic acid
B.
Acetic acid
C.
Maleic acid
D.
Glycol
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ANSWER :
A. Oxalic acid
18.
The addition of bromine to ethyne produces:

NEET - 2019

A.
1,2-Dibromoethene
B.
1,1-Dibromoethene
C.
1,1,2,2-Tetrachloroethane
D.
None of these
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ANSWER :
A. 1,2-Dibromoethene