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प्रश्न
Fill in the blank
All matter is made up of tiny particles called ______
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उत्तर
All matter is made up of tiny particles called atoms.
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संबंधित प्रश्न
The molecules can move freely anywhere in
Define the term matter. What is it composed of?
What are molecules ?
Define the following term of Matter .
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
Fill in the blank
Liquids have a definite ______
An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.
Which of the following are compounds ?
- CO
- No
- NO
- Co
Explain what happens when a beam of light is passed through a colloidal solution.
Which of the following do not exhibit Tyndall effect ?
Starch solution, Sugar solution, Ink, Salt solution, Copper sulphate solution, Ammonium chloride solution, Fog, Smoke, Car exhausts.
What is a suspension ? Give two examples of suspensions.
Which one of the following is not a chemical change ?
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 ?
Explain how, impure copper sulphate can be purified by crystallisation.
Which method is better for recovering sugar from sugar solution : evaporation or crystallisation ? Give reason
for your answer.
How is water purified on a large scale at water works ? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply ?
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
Matter is made up of ______.
Name the metals that are used in jewellery.
Give an example of a molecule.
