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 ?

Options

A. `1.12` L of hydrogen is produce as S.T.P.
B. `0.05` mol of magnesium is left behind
C. HCl is the limiting reagent .
D. None of these

Answer

D

Explanation

`{:("Mg" " " + " " 2HCl " " to MgCl_(2) + H_(2)), (2.4 g """""" " (1M, 100"ml")" ), (0.1 "mol" " " 0.1 "mol"), (underline(-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
`therefore` None of these is wrong.