$CaO(s) + H_{2} O (l) \to {Ca(OH)}_{2} (aq) + Heat$

What cannot be inferred from the above reaction?

Water

H_{2} O

is in vapour state.

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Calcium hydroxide

{Ca(OH)}_{2}

is aqueous in nature.

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Heat is released in the reaction.

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Calcium oxide (

CaO

) is solid.

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Solution

The correct option is A Water $H_{2} O$ is in vapour state.

Calcium oxide ( $CaO$ ) is mentioned as (s), hence it is in solid state.

Water ( $H_{2} O$ ) is mentioned as (l), hence it is in liquid state and not in vapour state.

Calcium hydroxide ${Ca(OH)}_{2}$ is mentioned as (aq), since it forms a solution with water.

Heat is released in the reaction.

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Complete the following chemical reactions.
$P b S_{(s)} + H_{2} O_{2 (a q)} \to$

$M n O_{4 (a q)}^{-} + H_{2} O_{(g)} \to$

$C a O_{(s)} + H_{2} O_{(l)} \to$

$A l C l_{3 (g)} + H_{2} O_{(l)} \to$

$C a_{3} N_{2 (s)} + H_{2} O_{(l)} \to$
Classify the above into (a) hydrolysis, (b) redox and (c) hydration reactions.

$CaO(s) + H_{2} O (l) \to {Ca(OH)}_{2} (aq) + Heat$

What cannot be inferred from the above reaction?

$C a O (s) + H_{2} O (l) \to C a (O H)_{2} (a q) + h e a t$

What can be inferred from the above reaction?

(i) $C a O$ is solid.

(ii) $C a O$ is reactive with water.

(iii) $H_{2} O$ is liquid.

(iv) $H_{2} O$ is in vapour state.

(v) $C a (O H)_{2}$ forms a solution with water

(vi) The reaction is exothermic.

$CaO(s) + H_{2} O (l) \to {Ca(OH)}_{2} (aq) + Heat$

What can be inferred from the above reaction?

CaO (s) + H_{2} O (l) 🡪 Ca {(OH)}_{2} (aq) + Heat

What can be inferred from the above reaction?

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