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  4. 2.4 g of pure Mg (at. mass = 24) is dropped in 100 mL of 1 M HCl. Which of the following statement is wrong?

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Q. 2.4 g of pure Mg (at. mass = 24) is dropped in 100 mL of 1 M HCl. Which of the following statement is wrong?

NTA AbhyasNTA Abhyas 2020Some Basic Concepts of Chemistry

Solution:

$Mg +2 HCl \rightarrow MgCl _{2}+ H _{2}$
$2.4 g (1 M , 100 ml )$
$0.1 mol 0.1 mol$
$\frac{-0.05}{0.05 mol }$
$HCl$ is a limiting reagent
$0.1$ mol HCl give $\frac{0.1}{2}$ mol $H _{2}$ or $1.12$ lit $H _{2}$ at STP
$0.05$ mol Mg left
$\therefore$ None of these is wrong.