Question

A mixture of oxygen and ethyne is used for welding.Can you tell why a mixture of ethyne and air is not used?
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Answer 1

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When ethyne is burnt in air incomplete burning takes place and produce sooty flame due to limited supply oxygen present in the air.Hence, This oxy-acetylene flame is used for welding and it is not possible to attain such a high temperature with air. Due this reason a mixture of ethyne and air is not used for welding.

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Answer 2

Answer:

Cleanliness is both the abstract state of being clean and free from germs, dirt, trash, or waste, and the habit of achieving and maintaining that state. Cleanliness is often achieved through cleaning. ... On a practical level, cleanliness is thus related to hygiene and disease prevention.

Explanation:

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