Which of the following is a linear molecule?

1. $\mathrm{BeCl}_2$
2. $\mathrm{H}_2 \mathrm{O}$
3. $\mathrm{SO}_2$
4. $\mathrm{CH}_4$

Solution

$\mathrm{Cl}-\mathrm{Be}-\mathrm{Cl}$ In $\mathrm{BeCl}_2, \mathrm{Be}$ is sp-hybridised, hence it has linear structure.

Asked in: AP EAMCET 2005

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