What are the similarities and differences between –

Soap and synthetic detergent.

What are the similarities and differences between –

Bath soap and soap for washing clothes.

What are the similarities and differences between –

Modern cement and ancient cement.

Explain why — Soap cannot be used in hard water.

Explain why –

Oil does not mix in water. However, oil and water become homogeneous if a sufficient quantity of detergent is added.

Explain why –
Synthetic detergents are superior to soap.

Explain why –
Often coloured spots are formed on clothes during washing.

Explain why –
Tobacco masheri should not be used for cleaning teeth.