JEE Main 2022 · 26 Jul · Shift 2 · Chemistry Q89

← JEE Main 2022 · 26 Jul · Shift 2

ChemistryInteger+4 / -1Question 89 of 90

A 100 mL solution of $\mathrm{CH_3CH_2MgBr}$ on treatment with methanol produces 2.24 mL of a gas at STP. The weight of gas produced is ______ mg. [nearest integer]

Your answer

Answer and worked solution

Official answer: 3

Gas is ethane: $\mathrm{C_2H_5MgBr+CH_3OH\rightarrow C_2H_6+Mg(OCH_3)Br}$ .

Mass. $\frac{2.24}{22400}=10^{-4}$ mol, times 30 g mol $^{-1}$ $=3$ mg.

Answer: 3

Topics:Stoichiometry Polyhalogen compounds

← Previous question Next question →

JEE Main 2022 · 26 Jul · Shift 2, Chemistry question 89