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प्रश्न
Name two solid, two liquid and two gaseous elements at the room temperature.
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उत्तर
Aluminium and copper are two elements that are solid at room temperature. Both bromine and mercury are liquid at room temperature. Nitrogen and hydrogen are two elements that are gaseous at room temperature.
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संबंधित प्रश्न
Name the terms for the change of vapour into a liquid.
The best evidence for the existence and movement of particles in liquids was provided by :
What is meant by saying that metals are lustrous ?
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium
Out of a colloid, solution and a suspension :
which one has the largest particles ?
Classify the following into true solutions and colloidal solutions:
Ink, Salt solution, Starch solution, Blood, Sugar solution
One of the following does not show Tyndall effect. This one is :
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 ?
Name the process which is used in milk dairies to separate cream from milk.
Name the process you would use to separate a mixture of water and alcohol.
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
How will you separate a mixture of iron filings, chalk powder and common salt ?
Describe a method for separating a mixture of iron filings and sulphur powder other than that by using a magnet.
Asmita went to buy an earthen pot. There she saw many things kept for sale.
How did she identify what she needed?
Which among the following ______ will get attracted to by magnet?
All the matter made of ______.
______ is a smallest particle.
Solids do not flow.
