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ICSE Class 10 Chemistry 2023 Paper

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Question : 31 of 88
Marks: +1, -0
Give the structural formula of the following organic compounds:
1. 2-chlorobutane
2. Methanal
3. But-2-yne
Solution:  
(1) H−C∣H∣H−C∣H∣H−C∣H∣H−CH3\mathrm{H} - {\overset{\mathrm{H}}{\overset{\vert}{\mathrm{C}}}}_{\underset{\mathrm{H}}{\vert}} - {\overset{\mathrm{H}}{\overset{\vert}{\mathrm{C}}}}_{\underset{\mathrm{H}}{\vert}} - {\overset{\mathrm{H}}{\overset{\vert}{\mathrm{C}}}}_{\underset{\mathrm{H}}{\vert}} - \mathrm{CH}_3
2-chlorobutane
(CH3CH2CHClCH3)(\mathrm{CH}_3\mathrm{CH}_2\mathrm{CHCl}\mathrm{CH}_3)
(2) H−C∣H=O\mathrm{H} - \underset{\mathrm{H}}{\underset{\vert}{\mathrm{C}}} = \mathrm{O}
(HCHO)
Methanal
(3) H−C∣H∣H−C≡C−C∣H∣H−H\mathrm{H} - {\overset{\mathrm{H}}{\overset{\vert}{\mathrm{C}}}}_{\underset{\mathrm{H}}{\vert}} - \mathrm{C} \equiv \mathrm{C} - {\overset{\mathrm{H}}{\overset{\vert}{\mathrm{C}}}}_{\underset{\mathrm{H}}{\vert}} - \mathrm{H}
But-2-yne
(CH3−C≡C−CH3)(\mathrm{CH}_3 - \mathrm{C} \equiv \mathrm{C} - \mathrm{CH}_3)
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