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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 aluminium oxide is.
  • ✓
    $Al _2 O _3+2 NaOH \rightarrow 2 NaAlO _2+ H _2 O$
  • B
    $Al _2 O _3+2 NaOH \rightarrow 2 NaAlO _3+ H _2 O$
  • C
    $Al _2 O _3+2 NaOH \rightarrow 2 NaAlO _2+ H _2$
  • D
    $Al _2 O _3+2 NaOH \rightarrow 2 NaAlO + H _2 O$
✓

Answer

Correct option: A.
$Al _2 O _3+2 NaOH \rightarrow 2 NaAlO _2+ H _2 O$
(a) $Al _2 O _3+2 NaOH \rightarrow 2 NaAlO _2+ H _2 O$
Explanation :
$\underset{\substack{\text { Aluminium } \\ \text { oxde }}}{ Al _2 O _3}+\underset{\text { Caustic soda }}{2 NaOH } \longrightarrow \underset{\substack{\text { Sodium meta } \\ \text { aluminate }}}{2 NaAlO _2}+\underset{\text { Water }}{ H _2 O }$

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