(i) Reaction between calcium oxide and water is a _ reaction
(ii) Treatment of mercuric oxide with strong heat is a __ reaction

Decomposition, Combination

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Combination, Combination

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Combination, Decomposition

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Decomposition, Decomposition

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Solution

The correct option is C Combination, Decomposition
(i) The reaction between calcium oxide and water is a combination reaction.
$C a O (s) + H_{2} O (l) ⟶ C a (O H)_{2} (s)$

(ii) The treatment of mercuric oxide with strong heat is a decomposition reaction.
$2 H g O (s) + h e a t ⟶ 2 H g (s) + O_{2}$

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(i) Reaction between calcium oxide and water is a _______ reaction(ii) Treatment of mercuric oxide with strong heat is a ________ reaction

The correct option is C Combination, Decomposition(i) The reaction between calcium oxide and water is a combination reaction.CaO(s)+H2O(l)⟶Ca(OH)2(s)(ii) The treatment of mercuric oxide with strong heat is a decomposition reaction.2HgO(s)+heat⟶2Hg(s)+O2

(i) Reaction between calcium oxide and water is a _ reaction
(ii) Treatment of mercuric oxide with strong heat is a __ reaction