An element A reacts with water to form a compound
B which is used in white washing. The compound
B on heating forms an oxide C which on treatment
with water gives back B. Identify A, B and C and
give the reactions involved.
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2
Answer:
b) calcium oxide
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Answer:
Element A is calcium (Ca). When it reacts with water, it forms calcium hydroxide. Thus. comF30und B is calcium hydroxide [Ca(OH)2], which is used in white washing. Compound 8 on heating gives CaO.
Ca(OH)2(B)−→−HeatCaO(C)+H2O
Thus,C is calcium oxide(CaO).
The reactions involved are Ca(A)+2H2O→Ca(OH)2H2↑⏐(B)
Ca(OH2)(B)→ΔCaO(C)+H2O
CaO(C)+H2O→Ca(OH)2(B)
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