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  4. 3CH3-C≡ CH arrow Cu tubeRed hot ?

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Q. $3CH_{3}-C\equiv CH \rightarrow _{Cu tube}^{Red hot}$ ?

NTA AbhyasNTA Abhyas 2022

Solution:

Three molecules of propyne polymerise in presence of red hot iron tube to form $1,3,5-$ trimethyl benzene.
Process is called cyclic polymerization of methyl acetylene.
Solution
$1,3,5-$ trimethyl benzene also called mesitylene.