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प्रश्न
Fill in the blank
All matter is made up of tiny particles called ______
उत्तर
All matter is made up of tiny particles called atoms.
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संबंधित प्रश्न
Define matter. Give four examples of matter.
Which of the following is a mixture ?
Salt, Air, Water, Alum, Sugar
Name the property which allows metals to be hammered into thin sheets.
Classify the following into elements and compounds :
- H2O
- He
- Cl2
- CO
- Co
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
Name two solid, two liquid and two gaseous elements at the room temperature.
In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :
Hydrogen, Oxygen, Steam, Chlorine
How much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?
Milk of Magnesia 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 can be used to recover salt from an aqueous salt solution.
Name the process by which all the dye can be recovered from black ink.
Write a method to separate a mixture of sand and potash alum.
Explain how, impure copper sulphate can be purified by crystallisation.
State whether true or false. If false, correct the statement.
Oil and water are immiscible with each other.
Rusting of an article made up of iron is called
Intermolecular space is maximum in ______.
Evaporation does form bubbles.
Give an example of a molecule.
