Question

(iv) What happens when Zn metal reacts with NaOH solution?

(a) The solution becomes colourless and no gas is evolved

(b) The solution becomes colourless, and a colourless and odourless gas i

(c) The solution becomes colourless, and a pungent smeling gas is evolved

(d) The solution becomes blue, and a colourless gas comes out .




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Answer 1

Zinc react with excess sodium hydroxide to form sodium zincate(Na2ZnO2) along with hydrogen gas. Zinc is a transition metal which shows moderate reactivity. Zinc reacts with NaOH to form sodium zincate with the evolution of hydrogen gas.

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