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JEE Main levelOne or more correct optionsDifficulty 2 of 3hc047

Which of the following alkenes give ethanal as one of the products on reductive ozonolysis?

A $CH X_{3} - CH = CH - CH X_{3}$
B $(CH X_{3}) X_{2} C = CH - CH X_{3}$
C $CH X_{3} CH X_{2} - CH = CH X_{2}$
D $CH X_{3} - CH = CH - CH X_{2} CH X_{3}$

Answer: A, B, D

Ethanal comes from a

CH X_{3} - CH =

end. But-2-ene, pent-2-ene and 2-methylbut-2-ene each have this end. But-1-ene has

CH X_{3} CH X_{2} - CH =

and

= CH X_{2}

ends, giving propanal and methanal.

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