1. What is the difference between displacement and double displacement reaction?
2. Why combination reaction is opposite to decomposition reaction?
3. Combustion of liquidised petroleum gas is a physical change, why?
4. Evaporation of water is an endothermic reaction, why?
5. What is the formula of quick line?
6. Is respiration exothermic or endothermic reaction?
7. Give one example of a decomposition reaction of a compound into two or more compounds.
8. What is the difference between chemical reaction and Chemical equation?
9. Explain the basic characteristics of chemical reaction.
10. Why should magnesium ribbon be cleaned before burning in air?