Archana Shukla Solutions for Chapter: Chemical Changes and Reactions, Exercise 6: EVALUATE

Neutralisation reaction is a chemical change. Explain.

Why the rusting of iron is slow in the deserts than in the coastal areas?

Bubbles are produced when acetic acid is added to sodium bicarbonate. Explain.

Alloying is a very good method of improving the properties of a metal. Explain by giving a few examples.

You must have seen that the silver articles, such as silver jewellery, turn black after sometimes. Explain this process. Is it a physical or a chemical change? What can be done to clean the silver articles?

Explain why the following is an example of a chemical change: 

Photosynthesis.

Explain why the following is the example of a chemical change: 

Rotting of an egg.

Identify the type of chemical reaction given below for a chemical equation:
$\mathrm{A}\mathrm{g}\mathrm{N}{\mathrm{O}}_3+\mathrm{K}\mathrm{C}\mathrm{l}\to \mathrm{A}\mathrm{g}\mathrm{C}\mathrm{l}\left(\downarrow \right)+\mathrm{K}\mathrm{N}{\mathrm{O}}_3$