General Methods of Preparation, Properties, and Reactions NEET Questions

Organic Chemistry - Hydrocarbons

General Methods of Preparation, Properties, and Reactions MCQ Questions


7.
Why can't methane be prepared by Kolbe's electrolytic method?
A.
Sodium formate doesn't decompose
B.
Methane has odd number of carbons
C.
Methane is too volatile
D.
Because two methyl radicals combine to form ethane, not methane
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ANSWER :
D. Because two methyl radicals combine to form ethane, not methane
8.
Which reagent is used to reduce alkyl halide to alkane?
A.
LiAlH4 only
B.
KMnO4/H+
C.
Zn/HCl
D.
Na/Liq. NH3
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ANSWER :
C. Zn/HCl
9.
Which of the following alkyl halides is NOT reduced by Zn/HCl?
A.
Alkyl iodides
B.
Alkyl bromides
C.
Alkyl chlorides
D.
Alkyl fluorides
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ANSWER :
D. Alkyl fluorides
10.
The reaction CH3CH2Br + 2Na + BrCH2CH3 → CH3CH2CH2CH3 + 2NaBr is known as:
A.
Wurtz reaction
B.
Sabatier-Senderens reaction
C.
Kolbe's reaction
D.
Frankland reaction
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ANSWER :
A. Wurtz reaction
11.
The order of reactivity of halogens with alkanes is:
A.
Cl2 > F2 > Br2 > I2
B.
F2 > Cl2 > Br2 > I2
C.
Br2 > Cl2 > F2 > I2
D.
I2 > Br2 > Cl2 > F2
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ANSWER :
B. F2 > Cl2 > Br2 > I2
12.
In free radical chlorination of methane, the order of ease of removal of hydrogens from different carbon types is:
A.
All equal
B.
2° > 1° > 3°
C.
3° > 2° > 1°
D.
1° > 2° > 3°
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ANSWER :
C. 3° > 2° > 1°