Tajmahal, the seventh wonder of the world, is made of white stone. This white stone contains the same substance ‘A’ that is present in chalk powder and lime-stone. It is turning yellow due to polluted air. If it is cleaned by an acidic cleaner, a gas ‘B’ is released, which when passed through a solution ‘C’, forms the same substance which is present in the white stone that was used to make Tajmahal
The substance A is-
CaCO3
Ca(OH)2
CaSO4
Ca3CO2
Answers
Answered by
6
Answer:
CaCO3
Explanation:
CaCO3 is present in chalk powered and limestone.
CaCO3 is calcium carbonate
Answered by
10
Answer:
The substance A is CaCO3, calcium carbonate.
Explanation:
- Limestone is a sedimentary rock composed principally of calcium carbonate (calcite) or the double carbonate of calcium and magnesium (dolomite).
- Chalk is a form of calcium carbonate, having the same chemical composition as ground calcium carbonate, limestone, marble, and precipitated calcium carbonate.
- Calcium carbonate reacts with dilute acids to produce calcium salt, water, and carbon dioxide gas.
- Carbon dioxide reacts with limewater, a solution of calcium hydroxide, to form a white precipitate of calcium carbonate.
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