What is formed when zinc reacts with sodium hydroxide?
(a) Zinc hydroxide and sodium
(b) Sodium zincate and hydrogen gas
(c) Sodium zinc-oxide and hydrogen gas
(d) Sodium zincate and water
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When Zinc reacts with sodium hydroxide it gives sodium zincate with hydrogen gas (Option b).
- Zinc is a transition metal that has less reactivity than sodium metal thus it could not displace sodium from sodium hydroxide.
- When bases react with metal, they produce a metallic salt and release hydrogen gas.
- When Zinc (Zn) reacts with Sodium hydroxide (NaOH) it shows the following reaction:
- Zn + 2 NaOH → Na₂ZnO₂ + H₂
- Therefore the products formed are Sodium zincate (Na₂ZnO₂) and Hydrogen gas (H₂).
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