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ICSE Class 10 Chemistry 2023 Paper

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Give a balanced chemical equation for the following conversions with conditions:
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Question : 55 of 88
Marks: +1, -0
Ethene from ethanol
Solution:  
Ethene from ethanol : By dehydration of alcohol.
C2H5OH+H2SO4→C2H5HSO4+H2Oethyl hydrogen sulphate\mathrm{C}_2\mathrm{H}_5\mathrm{OH} + \mathrm{H}_2\mathrm{SO}_4 \rightarrow \underset{\text{ethyl hydrogen sulphate}}{\mathrm{C}_2\mathrm{H}_5\mathrm{HSO}_4 + \mathrm{H}_2\mathrm{O}}
C2H5HSO4+H2SO4→170∘C\mathrm{C}_2\mathrm{H}_5\mathrm{HSO}_4 + \mathrm{H}_2\mathrm{SO}_4 \xrightarrow[170^{\circ}\mathrm{C}]{} CH2=CH2+H2SO4\mathrm{CH}_2=\mathrm{CH}_2+\mathrm{H}_2\mathrm{SO}_4
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