Answered

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Which formula represents an unsaturated hydrocarbon?
(1) C2H6 (3) C5H8
(2) C3H8 (4) C6H14

Sagot :

lulu1991
The answer is (3) C5H8. The unsaturated hydrocarbon has double bonds between carbon atoms. And there is a rule of formula that if the carbon number *2 + 2 = hydrogen number, then it is saturated hydrocarbon.

Answer: The correct answer is Option 3.

Explanation:

Saturated hydrocarbons are defined as the hydrocarbons which have single covalent C-C bonds. They are known as alkanes. The general formula for these hydrocarbons is [tex]C_nH_{2n+2}[/tex]

Unsaturated hydrocarbons are defined as the hydrocarbons which have double or triple covalent C-C bonds. They are known as alkenes and alkynes respectively. The general formula for these hydrocarbons is [tex]C_nH_{2n}[/tex] and [tex]C_nH_{2n-2}[/tex]

For the given options:

Option 1: [tex]C_2H_6[/tex]

This is a saturated hydrocarbon where n = 2.

Option 2: [tex]C_3H_8[/tex]

This is a saturated hydrocarbon where n = 3.

Option 3: [tex]C_5H_8[/tex]

This is an unsaturated hydrocarbon where n = 5. It is an alkyne.

Option 4: [tex]C_6H_{14}[/tex]

This is a saturated hydrocarbon where n = 6.

Hence, the correct answer is Option 3.

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