## Answers

with water to All altali metals react give hydroxides ZNa + 2H2O - 2 NAOH + Hz react with Ha to form all alkali metals metal tydrides 21a (5) + H2(g) -> 2NaH (5) Na(5) + tia(9) → znace (5) → Naz(5) X Na(5) + O2(g) The correct ean it 2 Na (5) + O2(g) og It → Jazoz v form peroxide ► Nags(5) v Z Ha (5) + 5(9) IT option is the incorrect one.

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