Question

a chemical is heated in a test tube brown fumes come out and a black residue is left behind

1. name the chemical which gives brown fumes

2. write the equation

3. name the compound which gives black residue

Answer 1

Answer on Question #43194, Chemistry, Other

Question:

a chemical is heated in a test tube brown fumes come out and a black residue is left behind

1. name the chemical which gives brown fumes

2. write the equation

3. name the compound which gives black residue

Answer:

1. $\mathrm{NO}_2$ (Brown fumes)

2. $2\mathrm{Cu}(\mathrm{NO}_3)_2 \rightarrow 2\mathrm{CuO} + 4\mathrm{NO}_2 + \mathrm{O}_2$

3. CuO (Black solid)

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