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प्रश्न
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
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उत्तर
A mixture of kerosene and petrol can be separated by fractional distillation.
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संबंधित प्रश्न
Liquids have definite volume but do not have definite shape.
What are molecules ?
Define the following term of Atom .
Name one element, one compound and one mixture.
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
Choose one term from the following which includes the other three :
aerosol, emulsion, colloid, sol
What is the effect of temperature on the solubility of solids in liquids ?
The solubility of ammonium chloride in water at various temperatures is given below :
| Temperature | : | 10°C | 20°C | 40°C | 60°C | 80°C |
| Solubility | : | 24 g | 37 g | 41 g | 55 g | 66 g |
What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at 40°C ?
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?
The material which is added to water during purification process at the water works so as to disinfect it is :
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
Complete the given analogy.
Murukku from hot oil: ______:: Coffee powder residue from decoction: ______
Diffentiate between absorption and adsorption.
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
Solids possess very high kinetic energy.
The physical state of water at 373 K is ______.
Gases do not diffuse very easily.
The phenomenon of Evaporation takes place at the ______ of a liquid.
Define the term matter.
