What is a balanced chemical equation? Give examples.
(a) What is a chemical equation? Explain with the help of an example.(b) Giving examples, state the difference between balanced and unbalanced chemical equations.(c) Balance the following chemical equations:(i) NH3 → N2+H2 (ii) C + CO2 → CO
Define word equation for chemical reaction by giving an example.
(a) What is a physical change ? Give two examples of physical changes.
(b) What is chemical change ? Give two examples of chemical changes.