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ICSE Class 10 Chemistry Question 26 of 93

Organic Chemistry — Question 9

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Question

Question 9

Give balanced equations for the following conversions:

(a) An alkene to an alkane

(b) An alkene to an alcohol

(c) An alkyne to an alkene.

Answer

(a) An alkene to an alkane

C2H4ethene+H2→300°CNickleC2H6ethane\underset{\text{ethene}}{\text{C}_2\text{H}_4} + \text{H}_2 \xrightarrow[300\degree\text{C}]{\text{Nickle}} \underset{\text{ethane}}{\text{C}_2\text{H}_6}

(b) An alkene to an alcohol

C2H4 ethene+H2O→300°C, 60 atm.H3PO4C2H5OHethene\underset{\text{ ethene}}{\text{C}_2\text{H}_4} + \text{H}_2\text{O} \xrightarrow[300\degree\text{C, 60 atm.}]{\text{H}_3\text{PO}_4} \underset{\text{ethene}}{\text{C}_2\text{H}_5\text{OH}}

(c) An alkyne to an alkene.

H2C2 ethyne [acetylene]+H2→300°CNickleC2H4ethene\underset{\text{ ethyne [acetylene]}}{\text{H}_2\text{C}_2} + \text{H}_2 \xrightarrow[300\degree\text{C}]{\text{Nickle}} \underset{\text{ethene}}{\text{C}_2\text{H}_4}