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Science — CBSE Class 10 board question

Q1. [1]
When zinc reacts with NaOH, the product formed is :
  1. (A) Na₂O
  2. (B) ZnO
  3. (C) Na₂ZnO₂
  4. (D) Zn(OH)₂
Previously asked in CBSE board exam
2026 31/3/1 Q23
Generated by claude-sonnet-4-6 · 2026-06-15 06:46 · grounding rag
Model Answer

(C) Na₂ZnO₂

Zinc is an amphoteric metal; it reacts with NaOH to form sodium zincate (Na₂ZnO₂) and hydrogen gas.

Explanation

Zinc reacts with NaOH because zinc oxide/zinc is amphoteric — it reacts with both acids and bases. The reaction is: Zn + 2NaOH → Na₂ZnO₂ + H₂. This is a standard fact linked to the amphoteric nature of zinc discussed in Chapter 3.

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