Chemistry
Give an example of each:
Combination reaction in which:
(i) An element of valency 3 combines with nitrogen.
(ii) A non-metal oxide reacting with water to form an acid.
(iii) A metal oxide reacting with water to form its hydroxide.
Chemical Reaction
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Answer
(i) 2Al + N2 ⟶ 2 AlN
(ii) SO2 + H2O ⟶ H2SO3 (sulphurous acid)
(iii) K2O + H2O ⟶ 2KOH (Caustic potash)
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(i) Metallic oxide on heating forms metallic oxide and oxygen.
(ii) A compound on heating gives a gas which turns lime water milky.
(iii) A white hydroxide on heating gives a yellow residue and water vapours.
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