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Answer the following questions:
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Chemical reaction, a process in which huge substances are converted to one or more small substances.
The coating is of black colour and it is of copper (II) oxide or of (CuO).
The coating is of black colour and it is of iron(II) oxide or of (FeO).
(↑)-shows evolution of gas, (↓)-represents a precipitate.
1. \(AgNO_3\)(aq) + \(NaCl\)(aq) → \(AgCl\)↓ + \(NaNO_3\)(aq)
\(FeS\) + \(H_2SO_4\) → \(FeSO_4\) + \(H_2S\)↑
Consider the above mentioned two chemical equations with two different kinds of arrows ( ↓ and ↑) along with the product. What do these two different arrows indicate?
\(FeS\) + \(H_2SO_4\) → \(FeSO_4\) + \(H_2S\)↑
Consider the above mentioned two chemical equations with two different kinds of arrows ( ↓ and ↑) along with the product. What do these two different arrows indicate?
2. If copper metal is heated over a flame it develops a coating. What is the colour and composition of coating?
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