Q.

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Z has lower molecular mass than P (aliphatic compound) and does not give iodoform test.
Mass of R (in grams) is……………
All reactions are assumed to proceeded with 100 % yield.
C =12u,  Br = 80u, O =16u, H =1u

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answer is 7.45.

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Detailed Solution

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Molecular mass of given compound= 142
Moles of reactant = 0.05 moles
Molecular mass of R= 149
Mass of R=0.05×149=7.45  grams

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