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Analytical Chemistry Uses of Ammonium Hydroxide and Sodium Hydroxide — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryAnalytical Chemistry Uses of Ammonium Hydroxide and Sodium Hydroxide1 Mark
MCQ
The correct reaction between Caustic soda solution and zinc oxide is.
  • A
    $ZnO +2 NaOH \rightarrow Na _2 ZnO + H _2 O$
  • B
    $ZnO +2 NaOH \rightarrow Na _2 ZnO _2+ H _2$
  • C
    $ZnO +2 NaOH \rightarrow Na _2 ZnO _2+ H _2 O _2$
  • ✓
    $ZnO +2 NaOH \rightarrow Na _2 ZnO _2+ H _2 O$
✓

Answer

Correct option: D.
$ZnO +2 NaOH \rightarrow Na _2 ZnO _2+ H _2 O$
(d) $ZnO +2 NaOH \rightarrow Na _2 ZnO _2+ H _2 O$
Explanation :
$\underset{\text { Zinc oxde }}{ ZnO }+\underset{\text { Caustic soda }}{2 NaOH } \longrightarrow \underset{\text { Sodium zincate }}{ Na _2 ZnO _2}+\underset{\text { Water }}{ H _2 O }$

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