Question

EXPLAIN WHY ETHENE IS A PLANAR MOLECULE WHILE ETHYNE IS A LINEAR MOLECULE

Answer 1

Answer:

In case of ethylene, C2 H4, show Sp2 hybridization where the four hydrogen atoms are placed in four corners of a plane sharing 120°

Whereas acetylene shows sp hybridization and shares an angle of 180° and thus it is linear.

Explanation:

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Answer 2

Ethene is a 'planar molecule,' whereas Ethyne is a 'linear molecule' because

• It is the first hydrocarbon in the alkene series.

• All carbon atoms in ethene are sp-bonded. Ethene has the chemical formula is $C_{2} H_{4}$ .
• $C_{2} H_{4}$, display Sp2 hybridization with 4 hydrogen atoms positioned in 4 corners of a plane sharing 120°.
• The ethene molecule has six atoms in total and the complete form of this molecule is $CH_{2}= CH_{2}$.

• The ethene has a linear form, based on the 'VSEPR' concept. This compound's common name is acetylene, and its molecular formula is $\mathrm{H}-\mathrm{C} \equiv \mathrm{C}-\mathrm{H}$.
• In the case of acetylene exhibits sp hybridization and shares an angle of 180°, making it linear.

• Two carbons are triple bonded in this combination, and the shape is linear.

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