Advertisements
Advertisements
प्रश्न
Give reasons for the following
Ordinary soap is wasted in hard water.
Advertisements
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
Name the chemicals which help in increasing food production.
What is the contribution of chemistry in following field?
Medicines
Name the scientists who discovered the following:
Safety lamp
Write True or False against the following statement.
Antibiotics are used as preservatives:
Explain in brief the importance of Chemistry in the production of various products.
State the contributions of Dimitri Mendeleev
Give reasons for the following
Titanium dioxide is an important ingredient in cosmetics.
Give reasons for the following
Cosmetics may contain preservatives, as one of their ingredients.
Give reasons for the following
All medicines must be taken under proper doctors' supervision and in the correct dose.
