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प्रश्न
Name a non-metal which is a good conductor of electricity.
Write one example of a non-metal that is a good conductor of electricity.
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उत्तर
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संबंधित प्रश्न
What are the two conditions for the interconversion of states of matter ?
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
What elements do the following compounds contain ?
Sugar, Common salt
Give reason why copper metal is used for making electric wires.
How would you confirm that a colourless liquid given to your is pure water ?
Which of the following is not an element ?
Which of the following are compounds ?
- CO
- No
- NO
- Co
Which one of the following is not a metalloid ?
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
Classify the following into true solutions and colloidal solutions:
Ink, Salt solution, Starch solution, Blood, Sugar solution
Explain what happens when a beam of light is passed through a colloidal solution.
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 you would use to separate a mixture of water and alcohol.
Pure copper sulphate can be obtained from an impure sample by the process of :
Which among the following ______ will get attracted to by magnet?
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which exists as a liquid at room temperature.
A teabag placed in a cup of hot water will diffuse into the water.
The fluidity of solids: ______.
Define the term matter.
