Question

1.Classify the following reactions as thermal decomposition and thermal
dissociation.

1. N2 + 3H2—- 2NH3
2. CaCO3— CaO +CO2
3. 2HgO—- 2Hg + O2
4. NH4 CI— NH3 + HCI
2.Predict the type of each reaction.

1. 2Ag +S—-Ag2S
2. NH4NO2—-N2 + 2H2O
3. 2NAI + CI2—- 2NaCI + I2
4. CuCI2 + 2NaOH—- Cu (OH)2 + 2NaCI
3.Why is respiration considered as exothermic process?
4. How can nitrogen stop food items containing high fat and oil from turning
rancid?

5.)Explains what happens when iron metal is left exposed in moist weather.
6 . Define a combination reaction. Give one example of an exothermic combination
reaction.

Answer 1

Answer:

1.Classify the following reactions as thermal decomposition and thermal

dissociation.

1. N2 + 3H2—- 2NH3

2. CaCO3— CaO +CO2

3. 2HgO—- 2Hg + O2

4. NH4 CI— NH3 + HCI

2.Predict the type of each reaction.

1. 2Ag +S—-Ag2S

2. NH4NO2—-N2 + 2H2O

3. 2NAI + CI2—- 2NaCI + I2

4. CuCI2 + 2NaOH—- Cu (OH)2 + 2NaCI

3.Why is respiration considered as exothermic process?

4. How can nitrogen stop food items containing high fat and oil from turning

rancid?

5.)Explains what happens when iron metal is left exposed in moist weather.

6 . Define a combination reaction. Give one example of an exothermic combination

reaction.