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Compelete reaction of 2.0 g calcium (at ...

Compelete reaction of 2.0 g calcium (at wt. = 40) with excess HCl produces 1.125 L of `H_(2)` gas. Complete reaction of the same wuantity of another metal "M" with excess HCl produces 1.85 L of `H_(2)` gas under identical conditions . The equivalent weight of "M" is closest to :

A

23

B

9

C

7

D

12

Text Solution

Verified by Experts

The correct Answer is:
D
`((eq)_(Ca))/((eq)_(M))=((eq)_(H_(2)),"released")/((eq)_(H_(2))," released")`
`((2/20))/((2/x))=((1.125)/(("eq.vol")H_(2)))/((1.85)/(("eq.vol".)H_(2)))" " {because"eq wt of M=X"}`
`:. x/20=1.125/1.85`
`x=1.125/1.85xx20~~12`
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