Question

Check all correct statements concerning pentyne.

Answer 1

1)  Check all correct statements concerning pentyne.

             a)  contains 5 carbons

             b)  has a triple bond

             c)  is an alkyne

2)  Which statement is not true of alkenes?

             a)  They are more stable than alkanes.

3)  Butene would have 4 carbon atoms and a ______ bond.

             a)  Double Bond

4)  Which type of reaction to alkenes generally undergo?

             a)  Addition Reaction

5)  If the carbon atom of hydrocarbon is bonded to less than 4 other atoms, the hydrocarbon is considered _______.

             a)  Unsaturated

6)  Which of the following apply to unsaturated hydrocarbons? Select all that apply.

             a)  They will react readily with other elements and compounds.

             b)  They have double and triple bonds.

7)  A straight chain hydrocarbon with the formula C5H10:

             a)  has a double C-C bond

8)  What is the general formula for alkenes?

             a)  CnH2n

9)  Choose the statements about benzene that are correct.

             a)  All of the C-C bonds are actually identical.

             b)  The structure of the molecule is closed like a ring structure.

Answer 2

Explanation:

1) Pentyne is an unsaturated hydrocarbon with formula $C_5H_8$. It is an alkyne molecule with single triple bond present in it.

Correct statements are:

• Contains 5 carbons
• Has a triple bond
• Is an alkyne

2) Alkenes are unsaturated hydrocarbons with double bonds.

• They are unsaturated.
• They are reactive.
• They have double bonds.

3) Butene is an unsaturated hydrocarbon with 4 carbon atoms and double bonds.

4)Alkene undergo addition reaction easily.

5)If the carbon atom of hydrocarbon is bonded to less than 4 other atoms, the hydrocarbon is considered unsaturated.

6)The correct statements are:

• They have double and triple bonds.

• They will react readily with other elements and compounds.

7)The general formula of :

Alkane = $C_nH_{2n+2}$

Alkene = $C_nH_{2n}$

Alkyne = $C_nH_{2n-2}$

The $C_5H_{10}$ is an alkene with double C-C bond.

8) The general formula of alkene is given by: $C_nH_{2n}$

9) Benzene is an aromatic cyclic compound with six membered carbon ring with alternative double bonds. Due to conjugation of double bond all the C-C bonds are identical.

• All C-C bonds share 2 pairs of electrons.

• All of the C-C bonds are actually identical.
• The structure of the molecule is closed like a ring structure.