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In the following diagram, what would happen if some amount of sodium hydroxide is taken in place of sulphuric acid and the test tube is heated :(a) Same amount of H2 gas is evolved(b) H2 gas is not evolved(c) The amount of H2 gas evolved in much less(d) In place of H2 gas, O2 gas evolved |
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Answer» Correct answer is (a) Same amount of H2 gas is evolved \(Zn + 2 NaOH\, \overset{\triangle}{\longrightarrow}\) \(\underset{\text{sodium zincate}}{Na_2 ZnO_2} + \underset{\text{Hydrogen gas}}{H_2 \uparrow}\) \(Zn + H_2SO_4\, \longrightarrow\) \(\underset{\text{sodium sulphate}}{ZnSO_4} + \underset{\text{Hydrogen gas}}{H_2 \uparrow}\) Same amount of H2 gas is evolved. it depends on only amount of zinc metal (NaOH and H2SO4 are in excess). |
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