JEE Main 2022 · 25 Jun · Shift 1 · Chemistry Q90

← JEE Main 2022 · 25 Jun · Shift 1

ChemistryInteger+4 / -1Question 90 of 90

Number of grams of bromine that will completely react with 5.0 g of pent-1-ene is ______ $\times10^{-2}$ g. (Atomic mass of Br = 80 g/mol) [Nearest integer]

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Answer and worked solution

Official answer: 1143

One $\mathrm{Br_2}$ per C=C. Pent-1-ene ( $M=70$ ): $\frac5{70}$ mol, so $\mathrm{Br_2}$ $=\frac5{70}\times160\approx11.43$ g $=1143\times10^{-2}$ g.

Answer: 1143

Topics:Alkenes Stoichiometry

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JEE Main 2022 · 25 Jun · Shift 1, Chemistry question 90