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ICSE Class 10 Chemistry 2013 Paper

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Give a chemical test to distinguish between the following pairs of compounds :
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Question : 21 of 84
Marks: +1, -0
Ethene gas and ethane gas.
Solution:  
To given gas adding few drops of KMnO4\mathrm{KMnO}_4 , In case of Ethene gas decolorises the purple colour of KMnO4\mathrm{KMnO}_4 whereas no change observed with ethane.
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