An organic compound P with molecular formula $$C_9H_{18}O_2$$ decolorizes bromine water and also shows positive iodoform test. P on ozonolysis followed by treatment with $$H_2O_2$$ gives Q and R. While compound Q shows positive iodoform test, compound R does not give positive iodoform test. Q and R on oxidation with pyridinium chlorochromate (PCC) followed by heating give S and T, respectively. Both S and T show positive iodoform test.

Complete copolymerization of 500 moles of Q and 500 moles of R gives one mole of a single acyclic copolymer U.

[Given, atomic mass: H = 1, C = 12, O = 16]