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?

Question

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? (A) 1.12 L of hydrogen is produced at S.T.P. (B) 0.05 mol of magnesium is left behind (C) HCl is the limiting reagent (D) none of these

Tardigrade Admin · Accepted Answer

Mg +2 HCl arrow MgCl 2+ H 2 2.4 g (1 M , 100 ml ) 0.1 mol 0.1 mol (-0.05/0.05 mol ) HCl is a limiting reagent 0.1 mol HCl give (0.1/2) mol H 2 or 1.12 lit H 2 at STP 0.05 mol Mg left ∴ None of these is wrong.

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?

1.12 L of hydrogen is produced at S.T.P.

0.05 mol of magnesium is left behind

HCl is the limiting reagent

none of these

$M g + 2 H Cl \to M g C l_{2} + H_{2}$
$2.4 g (1 M, 100 m l)$
$0.1 m o l 0.1 m o l$
$\frac{- 0.05}{0.05 m o l}$
$H Cl$ 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
$∴$ None of these is wrong.

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?

1.12 L of hydrogen is produced at S.T.P.

0.05 mol of magnesium is left behind

HCl is the limiting reagent

none of these

Mg+2HCl→MgCl2​+H2​ 2.4g(1M,100ml) 0.1mol0.1mol 0.05mol−0.05​ HCl is a limiting reagent 0.1 mol HCl give 20.1​ mol H2​ or 1.12 lit H2​ at STP 0.05 mol Mg left ∴ None of these is wrong.

$M g + 2 H Cl \to M g C l_{2} + H_{2}$
$2.4 g (1 M, 100 m l)$
$0.1 m o l 0.1 m o l$
$\frac{- 0.05}{0.05 m o l}$
$H Cl$ 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
$∴$ None of these is wrong.