The weight of zinc required for the liberation of 10 g of hydrogen gas on reaction with H2SO4 is:
(Atomic mass of Zn is 65.38 a.m.u.)
A
655 g
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B
163.7 g
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C
491.25 g
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D
326.9 g
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Solution
The correct option is C 326.9 g The chemical equation for the reaction between zinc and sulphuric acid can be written as: Zn+H2SO4→ZnSO4+H2 For liberation of 2 g of H2, amount of zinc required =65.38 For liberation of 10 g of H2, amount of zinc required =65.382×10=326.9g