74
Question
A solution of a substance 'X' is used for white washing.
1. Name the substance 'X' and write its formula.
2. Write the reaction of the substance 'X' named in (i) above with water.[2 MARKS]
A solution of a substance 'X' is used for white washing.
1. Name the substance 'X' and write its formula.
2. Write the reaction of the substance 'X' named in (i) above with water.[2 MARKS]
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Solution
Each point: 1 Mark
1. The substance 'X' is calcium oxide (quick lime). Its formula is CaO.
2. CaO(s)+H2O(l)→Ca(OH)2(aq)
Each point: 1 Mark
1. The substance 'X' is calcium oxide (quick lime). Its formula is CaO.
2. CaO(s)+H2O(l)→Ca(OH)2(aq)
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