JEE Mains · Chemistry · STD 11 - 1. Some basic concept of chemistry
Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl is _______.
Given : Molar mass of Mg is \(24 \mathrm{~g} \mathrm{~mol}^{-1}\).
- A 235.7 g
- B 0.24 mg
- C 236 mg
- D 2.444 g
Answer & Solution
Correct Answer
(C) 236 mg
Step-by-step Solution
Detailed explanation
\(\mathrm{Mg}+2 \mathrm{HCl} \rightarrow \mathrm{MgCl}_2+\mathrm{H}_2\) Volume \(\mathrm{H}_2\) evolved \(=220 \mathrm{ml}\) Mole of \(\mathrm{H}_2=\frac{220 \times 10^{-3}}{22.4}=\) mole of Mg used…
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