Chemistry
Related Questions
(a) What do you understand by :
(i) temporary hardness
(ii) soft water
(iii) permanent hardness
(b) How are temporary and permanent hardness removed ?
(a) What are soaps and detergents?
(b) Why do they differ in their actions ?
(c) Explain their cleansing actions.
Copy and complete the following table that refers to the action of heat on some carbonates:
Carbonate Colour of residue on cooling Zinc carbonate Lead carbonate Copper carbonate Complete the following table and write your observations.
Hydrogen sulphide Ammonia Sulphur dioxide Hydrogen chloride Shake the gas with red litmus solution Shake the gas with blue litmus solution Apply a burning splint to the gas