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Physical Properties of Alkynes

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Question

Select from the list the gas that matches the descriptions given in each case:

[ammonia, ethane, hydrogen chloride, hydrogen sulphide, ethyne]

This gas is used for welding purpose.

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Solution

Ethyne or acetylene is used for welding and cutting metals as it is an highly exothermic reaction. The flame temperature is $3500^{\circ} C$ .

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