17(iii) Assertion: Ethene is an unsaturated hydrocarbon.
Reason: Ethene contains carbon-carbon triple covalent bond.
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Answer:(1) Ethylene (CH2=CH2) contains a double bond between carbon atoms. (2) Thus, the valencies of the two carbon atoms are not fully satisfied by single covalent bonds. Hence, ethylene is an unsaturated hydrocarbon.
Explanation:to make you understand better ethylene is also called ethene which we know is from the family of alkenes hence its unsaturated and its formula is C2H4 therefore it is a hydrocarbon hence assertion is true. but it forms double bonds instead of triple bonds therefore the reason is false
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