Advertisements
Advertisements
प्रश्न
State what are – ‘stain removals’. Name three important stain removers & give their prime functions.
Advertisements
उत्तर
Stain removals: It is the process of removing a mark or a stain left by one substance on a specific surface fabric. Most stains are removed by dissolving with a solvent.
Examples of stain removers:
| Substance |
Stain |
| Lemon juice | contains citric acid and is used for removing stains from fabrics. |
| Hydrogen peroxide | a mild bleaching agent also effective in removing stains. |
| Glycerine | it softens stains on wool |
संबंधित प्रश्न
What is alchemy?
Write True or False against the following statement.
Chemistry plays an important role in the national economy:
Write True or False against the following statement.
Gunpowder is an insecticide:
State the functions of the following basic glass apparatus:
Retort
State the method used for collecting the following gas:
Oxygen – a gas slightly soluble in water.
In the medieval ages – the philosopher’s stone was connected with all transformations. Explain.
Select the correct name from the choices given below for the following case.
A Medicine to treat pain, fever & inflammation.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A long glass apparatus closed at one end used for collecting gases.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A modern apparatus with an air regulator, used for heating purposes.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A modern apparatus with an air regulator, used for heating purposes.
