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A Mixture of Oxygen and Ethyne is Burnt for Welding. Can You Tell Why a Mixture of Ethyne and Air is Not Used? - CBSE Class 10 - Science

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Question

A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?

Solution

2HC ≡ CH + 5O2 → 4CO2 + 2H2O + Heat
When ethyne is burnt in air, it gives a sooty flame. This is due to incomplete combustion caused by limited supply of air. However, if ethyne is burnt with oxygen, it gives a clean flame with temperature 3000°C because of complete combustion. This oxy-acetylene flame is used for welding. It is not possible to attain such a high temperature without mixing oxygen. This is the reason why a mixture of ethyne and air is not used.

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APPEARS IN

 NCERT Solution for Science Textbook for Class 10 (2019 to Current)
Chapter 4: Carbon and its Compounds
Q: 2 | Page no. 71

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Solution A Mixture of Oxygen and Ethyne is Burnt for Welding. Can You Tell Why a Mixture of Ethyne and Air is Not Used? Concept: Chemical Properties of Carbon Compounds - Oxidation.
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