Question 1

Which of the following compounds is classified as an alkyne?

Accepted Answer

C2H2

Answer

C5H10

Answer

C2H4

Answer

C3H8

Question 2

What type of bond is present in alkynes?

Accepted Answer

Triple bond

Answer

Double bond

Answer

Single bond

Answer

Quadruple bond

Question 3

Which of the following is a property of alkynes?

Accepted Answer

They are generally less reactive than alkenes.

Answer

They are always liquid at room temperature.

Answer

They are saturated hydrocarbons.

Answer

They have only single bonds.

Question 4

Which of the following is the general formula for alkynes?

Accepted Answer

C_nH_{2n-2}

Answer

C_nH_{2n}

Answer

C_nH_{2n+2}

Answer

C_nH_{2n-1}

Question 5

Which of the following alkynes has the simplest molecular formula?

Accepted Answer

C2H2

Answer

C4H6

Answer

C3H4

Answer

C5H8

Question 6

What is a common use for alkynes in industry?

Accepted Answer

Welding and cutting metals

Answer

Fertilizer manufacturing

Answer

Food preservation

Answer

Synthetic rubber production

Question 7

Which of the following statements is true about alkynes?

Accepted Answer

They can undergo reactions to form cis and trans isomers.

Answer

They are always gaseous at room temperature.

Answer

They have no functional groups.

Answer

They cannot participate in addition reactions.

Question 8

What is the least reactive among alkanes, alkenes, and alkynes?

Accepted Answer

Alkanes

Answer

Alkenes

Answer

Alkynes

Answer

All are equally reactive

Question 9

Which of the following compounds is not an alkyne?

Accepted Answer

C3H8

Answer

C5H8

Answer

C2H2

Answer

C4H6

Question 10

What is the primary characteristic that distinguishes alkynes from alkenes?

Accepted Answer

Presence of a carbon-carbon triple bond

Answer

Higher density than alkenes

Answer

Presence of a carbon-carbon double bond

Answer

Presence of a carbon-carbon single bond

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