Hydrocarbons Test

Result

Hydrocarbons Test - 8

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Weekly Quiz Competition

Question 1
1 / -0

What is the name of the reaction given below?

C₆H₅Br + 2Na + BrCH₃ → C₆H₅-CH₃ + 2NaBr

A
Wurtz reaction

B
Wurtz-Fittig reaction

C
Friedel-Crafts reaction

D
Berthelot synthesis

Solution

The reaction is called Wurtz-Fittig reaction and is a common method of preparing toluene.
Question 2
1 / -0

What is the number of acidic hydrogen atoms in 1-butyne?

A
1

B
2

C
3

D
4

Solution

1-butyne contains one acidic hydrogen atom attached with sp-hybridised carbon atom.
Question 3
1 / -0

Which of the following reagents is used to distinguish between 1-butyne and 2-butyne?

A
Alcoholic KOH

B
Alcoholic KMnO₄

C
Br₂ water

D
Silver ion

Solution

AgNO₃ + NH₄OH (Tollens' reagent)
1-butyne is a terminal alkyne, so it gives white precipitate with Tollens' reagent, while 2-butyne does not react with Tollens' reagent.