Advertisements
Advertisements
प्रश्न
Which of the following mixture cannot be separated by using water as the solvent ?
पर्याय
copper sulphate and sand
sand and potash alum
sand and sulphur
sugar and sand
उत्तर
sand and sulphur
Mixture of sand and sulphur cannot be separated by using water as a solvent because both are insoluble in water.
APPEARS IN
संबंधित प्रश्न
Match the following
Column A | Column B | ||
(a) | Molecules | (i) | Water boils |
(b) | 100° C | (ii) | Evaporation |
(c) | 0° C | (iii) | Changes from solid to gas |
(d) | At all temperatures | (iv) | Matter |
(e) | Camphor | (v) | Water freezes |
Classify the following into elements, compounds and mixtures:
- Sodium
- Soil
- Sugar solution
- Silver
- Calcium carbonate
- Tin
- Silicon
- Coal
- Air
- Soap
- Methane
- Carbon dioxide
- Blood
What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?
What is the other name for impure substances ? Give two examples of impure substances.
If 25 mL of acetone is present in 150 mL of its aqueous solution, calculate the concentration of solution.
Which of the following is a sol ?
Shaving cream, Milk, Fog, Soap solution, Hairspray
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
Define Aerosol Give one example.
21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
State whether the following statement are true or false :
Salt and water can be recovered from an aqueous salt solution by the process of evaporation.
Name the process which can be used to purify an impure sample of copper sulphate.
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
Fill in the following blanks with suitable words :
The separation of liquids by fractional distillation is based on the difference in their .....................
How is scrap iron separated from a heap of waste materials in factories?
Which one of the following scrap metal cannot be separated by magnetic separation ?
Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?
Diffentiate between absorption and adsorption.
Rusting of an article made up of iron is called
Give an example of a molecule.