CBSE Class 10 Science 2018 · Paper 31(B)/C · Question 3
An aqueous solution of a substance ‘P’ is used in white washing. Name the substance ‘P’ and write its chemical formula. Also write the chemical equation for the reaction of substance ‘P’ with water.
Answer
P is calcium oxide (quick lime), ; with water it forms calcium hydroxide and gives out heat.
P is calcium oxide (quick lime); its chemical formula is .
With water it forms calcium hydroxide (slaked lime), whose solution is used for white washing, and a large amount of heat is given out:
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