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Zinc metal reacts with sodium hydroxide to produce _______.
Question

Zinc metal reacts with sodium hydroxide to produce _______.

A.

zinc hydroxide

B.

zinc oxide

C.

sodium hydride

D.

sodium zincate

Correct option is D

The correct answer is: D) Sodium zincate
Explanation:
The reaction occurs because zinc is an amphoteric metal, meaning it reacts with both acids and bases.

Reaction:

Zn+2NaOH+H2ONa2ZnO2+H2Zn + 2NaOH + H_2O \rightarrow Na_2ZnO_2 + H_2 \uparrow

Information Booster:
  • Amphoteric Metals: Zinc (Zn), Aluminium (Al), and Lead (Pb) react with both acids and bases.
  • Sodium Zincate (Na₂ZnO₂): A soluble complex formed in the reaction of zinc with NaOH.
  • Other Amphoteric Oxides: Al₂O₃ (Aluminium Oxide), ZnO (Zinc Oxide), PbO (Lead Oxide).
  • Hydrogen gas (H₂) test: A burning splint makes a "pop" sound when exposed to H₂ gas.​

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