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Page No 71: - Chapter 4 - Carbon & Its Compounds - Ncert Solutions class 10 - Science

Updated On 26-08-2025 By Lithanya


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Question 1:

Why is the conversion of ethanol to ethanoic acid an oxidation reaction?

Answer:

https://img-nm.mnimgs.com/img/study_content/curr/1/10/10/148/1109/Chapter%204_html_m47cd0626.gif

Since the conversion of ethanol to ethanoic acid involves the addition of oxygen to ethanol, it is an oxidation reaction.

 

Question 2:

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

Answer:

https://img-nm.mnimgs.com/img/study_content/curr/1/10/10/148/1112/Chapter%204_html_m4ed65ffd.gif

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.