Exothermic Reactions MCQ (Multiple Choice Questions) PDF Download

In exothermic reactions, the final energy content of products is

1. lower than the energy contents of the reactants
2. higher than the energy contents of the reactants
3. not depend upon the energy content of the reactants
4. none of above

Which one of these is an incorrect statement about an exothermic reaction?

1. it form a compound which gives out heat while being formed
2. it contains products that are very stable
3. it results in overall enthalpy change zero
4. it gives overall negative enthalpy

Exothermic reactions take place when energy given out in making bonds is

1. less than the energy taken in for breaking bonds
2. more than the energy taken in for breaking bonds
3. equal to the energy taken in for breaking bonds
4. none of above

Exothermic reactions do not include

1. upon heating, hydrogen results in water
2. neutralization of acids and alkalis
3. respiration
4. breaking of chemical bond

Upon heating either of the carbonate, hydroxide or nitrate, a common byproduct is

1. Heat
2. water vapors
3. oxides of same compounds
4. carbon dioxide