What is chlorination?

Classify each of the following as a homogeneous or heterogeneous mixture. soda water, wood, air, soil, vinegar, filtered tea.

Salt can be recovered from its solution by evaporation. Suggest some other technique for the same?

What are the favourable qualities given to gold when it is alloyed with copper or silver for the purpose of making ornaments?

Classify the following into metals, non-metals and metalloids: Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium.

What will happen if a saturated solution is: (i) heated, and (ii) cooled?

Describe a method to separate a mixture of camphor and sand.

On heating calcium carbonate gets converted into calcium oxide and carbon dioxide: Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.

Sucrose (sugar) crystals obtained from sugarcane and beetroot are mixed together. Will it be a pure substance or a mixture? Give reasons for the same.

What is the name of the clear liquid formed when a solid dissolves in a liquid?