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KEAM 2019 Physics and Chemistry Paper

Question : 89 of 120

Marks: +1, -0

The carbon atoms in calcium carbide are held by

Solution:

The carbon atoms in calcium carbide are held together by one sigma and two

\pi

-bonds.

The structural representation of

\mathrm{CaC}_{2}

[:\mathrm{C} \equiv \mathrm{C}:]^{2-}\mathrm{Ca}^{2+}

This can be produced industrially from a mixture of lime and coke in an electric are furnace at

2,200^{\circ} \mathrm{C}.

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