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Grade: 11
        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
5 years ago

Answers : (1)

Kevin Nash
askIITians Faculty
332 Points
							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.

						
5 years ago
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