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प्रश्न
Give reasons for the following
Ordinary soap is wasted in hard water.
उत्तर
Ordinary soap is wasted in hard water because hard water is one which does not lather with soap.
संबंधित प्रश्न
Give two examples of the following substance.
Building materials
What is the contribution of chemistry in following field?
Clothing
What is the contribution of chemistry in following field?
Cosmetics
Name the scientists who discovered the following:
Oxygen
_____________ help to increase the production of food.
Fill in the blank:
Inert gases were discovered by ___________
Explain in brief the importance of Chemistry in agriculture.
Differentiate between the terms food preservatives and food processing with appropriate examples.
Give reasons for the following
Aspirin is one of the most widely used medications – globally.
Select the correct name from the choices given below for the following case.
A synthetic fibre used in clothing.
