SELECT * FROM question_mgmt as q WHERE id=3584 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=255 and ex_no='3' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Carbon and Its Compound a mixture of oxygen and ethyne is burnt for weldin

Question:

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

Answer:

Because when ethyne is burnt in air, it gives a sooty flame. This is due to incomplete combustion caused by limited supply of oxygen. 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 providing oxygen. This is the reason that a mixture of ethyne and air is not used.


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