Q1. [1] § 3.2 CHEMICAL PROPERTIES OF METALS § 3.3 HOW DO METALS AND NON-METALS REACT? § 3.4 OCCURRENCE OF METALS
When zinc reacts with sodium hydroxide, the product formed is :
- (a) Sodium oxide
- (b) Sodium zincate
- (c) Zinc hydroxide
- (d) Zinc oxide
Previously asked in CBSE board exam
2023 31/2/1 Q4
Generated by claude-sonnet-4-6 · 2026-06-15 06:47 · grounding rag
Model Answer
(b) Sodium zincate
Zinc reacts with sodium hydroxide to form sodium zincate (Na₂ZnO₂) and hydrogen gas, as zinc is amphoteric and reacts with bases.
Explanation
Zinc is an amphoteric metal — it reacts with both acids and bases. With NaOH, it forms sodium zincate (Na₂ZnO₂), not zinc oxide or zinc hydroxide. The NCERT chapter on metals mentions zinc oxide as an amphoteric oxide, which is the key concept behind this reaction. Remember: amphoteric metals/oxides react with bases to form zincate/aluminate salts.
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