Question

Check all correct statements concerning pentyne.

contains 3 carbons
contains 5 carbons
contains 7 carbons
has only single bonds
has a double bond
has a triple bond
is an alkyne
is an alkene
is an alkane

Which statement is not true of alkenes?
They are unsaturated.
They are reactive.
They have double bonds.
They are more stable than alkanes.

Butene would have 4 carbon atoms and a ______ bond.
Single
Triple
Double


Which type of reaction to alkenes generally undergo?
Substitution
Displacement
Redox
Addition


If the carbon atom of hydrocarbon is bonded to less than 4 other atoms, the hydrocarbon is considered _______.
aromatic
diluted
saturated
unsaturated


Which of the following apply to unsaturated hydrocarbons? Select all that apply.
They do not have isomers.
They are more stable than saturated hydrocarbons.
They will react readily with other elements and compounds.
They have double and triple bonds.
They only have single bonds.


A straight chain hydrocarbon with the formula C5H10:
has a triple C-C bond
has a double C-C bond
is essentially inert
is unstable and extremely reactive


What is the general formula for alkenes?
CnH2n+2
CnH2n
CnH2n+1
CH2n+2

Choose the statements about benzene that are correct.
all benzene hydrocarbons are CnHn+2
All C-C bonds share 2 pairs of electrons.
Three 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.

The last one is attached as a pic.

Answer 1

Step-by-step 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.

Answer 2

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.