Q70 / 200 · NEET 2011 (Screening) · Chemistry

Considering the state of hybridisation of carbon atoms, find out the molecule among the following which is linear.

  • Correct answer
    A
    $\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_3$
  • B
    $\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{C} \equiv \mathrm{CH}$
  • C
    $\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_3$
  • D
    $\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_3$

Solution

$\mathrm{H}_3 \mathrm{C}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_3$ is linear, because $\mathrm{C}_2$ and $\mathrm{C}_3$ are $s p$ hybridised.

Hence, the correct answer is option: 'A'.

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