CGPET 2019 Solved Paper

Key Point Olefins (alkenes) give respective aldehydes/ketones on ozonolysis. To find the parent alkene that gives related aldehyde/ketone (i.e., moles of acetone and one mole of glyoxal), we remove the double bond from the given structure and add =0 in the obtained fragment (i.e., in place of double bond), to get the required aldehyde/ketone.
The products formed on the ozonolysis of alkene are as follows:
(a) 2, 4 dimethylhex 2,4 -diene(b) 3,4 -dimethylhex 2,4 diene(c) 3, 4 -dimethylhex 1,5 diene(d) 2, 5 dimethylhex 2,4 , dieneHence, solution (d) is the correct option.