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Alkynes are __________ in nature and first four members are __________ gases.

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in Chemistry – Class 11 by (148k points)
Alkynes are __________ in nature and first four members are __________ gases.

(a) polar, white

(b) nonpolar, colourless

(c) polar, colourless

(d) nonpolar, white

I had been asked this question in a national level competition.

This intriguing question originated from Hydrocarbons topic in chapter Hydrocarbons of Chemistry – Class 11

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Right option is (b) nonpolar, colourless

The best I can explain: Alkanes being nonpolar in nature, soluble in nonpolar solvents but insoluble and polar solvent such as water. The first four members of alkanes are colourless gases, the next 13 members are colourless liquids and next higher members are colourless solids, this can be explained on the basis of the magnitude of attraction forces.

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