Nishi Arora Solutions for Chapter: Chemical Reactions, Exercise 2: TEST Yourself

Define chemical reaction.

Give two examples of the following change occurring during a chemical reaction:
Change of colour. 

Give two examples of the following change occurring during a chemical reaction.
Evolution of a gas

Give two examples of the following change occurring during a chemical reaction:
Formation of precipitate

In the following reactions name the substance oxidised, the substance reduced, an oxidising agent and a reducing agent.

$\mathrm{CuO}+{\mathrm{H}}_{2 }\to \mathrm{Cu}+{\mathrm{H}}_2\mathrm{O}$

Which of the following is a chemical change?

The gas produced when zinc reacts with dilute hydrochloric acid is

The chemical reaction,$\mathrm{Cu}+2{\mathrm{AgNO}}_3 \to \mathrm{Cu}{\left({\mathrm{NO}}_3\right)}_2+2\mathrm{Ag}$ is an example of a