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Grade 11Physical Chemistry

When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is a. 1 : 1 b. 1 : 2 c. 2 : 1 d. 9 : 4

Simran Bhatia

12 Years agoGrade 11

1 Answer

Kevin Nash

12 Years ago

Sol. The balanced chemical reaction of zinc with sulphuric acid and NaOH are Zn + H2SO4→ ZnSO4 + H2 (g) ↑ Zn + 2NaOH + 2H2O →Na[Zn(OH)4] + H2 (g) ↑ Since one mole of H2 (g) is produced per mole of zinc with both sulphuric acid and NaOH respectively, hydrogen gas is produced in the molar ratio of 1 : 1 in the above reactions.

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