Why is energy involved in a chemical change?
Important Questions on Chemical Changes and Reactions
Give an example of a reaction where the following is involved:
Evolution of heat.
Give an example of a reaction where the following is involved:
Absorption of heat.
Give an example of a reaction where the following is involved:
High pressure is required.
State the main characteristics of chemical reactions. Give at least one example in each case.
Give an example of each of the following chemical changes:
A reaction involving (i) change of state (ii) formation of a precipitate.
Give an example of each of the following chemical changes:
An exothermic and an endothermic reaction involving carbon as one of the reactants.
Give an example of the following chemical change.
A reaction where colour change is noticed.
