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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.
Food preservatives
Give two examples of the following substance.
Chemical war weapons
What is the contribution of chemistry in following field?
Industry
Name the scientists who discovered the following:
Atoms
Fill in the blank:
L.P.G. is used for ___________
Choose the correct alternative from the choices given below for the following statement:
Mortar is used as a
Differentiate between the terms food preservatives and food processing with appropriate examples.
Give reasons for the following
Titanium dioxide is an important ingredient in cosmetics.
Give reasons for the following
Polyester is added to natural fiber cotton, to give terylene.
Give reasons for the following
All medicines must be taken under proper doctors' supervision and in the correct dose.
