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Saturated and Unsaturated Compounds

Ethene (H_2C=...

Question

Ethene $(H_{2} C = C H_{2})$ is an unsaturated hydrocarbon.

A

True

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B

False

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(H_{2} C = C H_{2})

is an unsaturated hydrocarbon.

H_{2} C = C H_{2} + H_{2} N i / 300^{0} C - ----- \to C_{2} H_{6}

to get back the ethene, ethane must be:

H_{2} C = C H_{2}

, ethene. If one

C H_{2}

group is held in its position, while the other

C H_{2}

group is rotated about the axis passing through nuclel C-C in ethene, then : Which of the following is wrong?

Q. Explain the oxidation of ethene by cold,alkaline KMnO₄. Where does the H-O-H and [O] come from??

OXIDATION:
Ethene is oxidised with alkaline KMnO₄ at room temperature.

H_{2} C = C H_{2} + H - O - H + [O] \to H_{2} C - C H_{2} | | O H O H

Ethene Cold alkaline 1, 2- Ethanediol
KMnO₄ solution
[oxidising agent]
(Ethylene glycol)
The purple colour of KMnO₄ decolourises.

Q. Methane is a saturated hydrocarbon while ethene and ethyne are unsaturated hydrocarbons.

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