Gas evolved when Calcium oxide reacts with water is/are :A.oxygenB.carbon dioxideC.hydrogenD.both hydrogen & oxygen
Question
Gas evolved when Calcium oxide reacts with water is/are :A.oxygenB.carbon dioxideC.hydrogenD.both hydrogen & oxygen
Solution
When calcium oxide (CaO) reacts with water (H2O), it forms calcium hydroxide (Ca(OH)2). This is a type of reaction called a hydration reaction. Here is the chemical equation for this reaction:
CaO + H2O -> Ca(OH)2
As you can see from the equation, no gas is evolved during this reaction. Therefore, none of the options A, B, C, or D are correct. The reaction produces calcium hydroxide, which is a solid, not a gas.
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