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प्रश्न
Give reasons for the following
Ordinary soap is wasted in hard water.
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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.
Fuel
Name the chemicals which help in increasing food production.
What is the contribution of chemistry in following field?
Cosmetics
What is the contribution of chemistry in following field?
Medicines
Food items like jams and pickles are protected by using ___________.
Explain in brief the importance of Chemistry in the production of various products.
State the contributions of Dimitri Mendeleev
Differentiate between natural fibres & synthetic fibres.
Food processing is an important procedure for obtaining marketable food products.
