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प्रश्न
Name two metals whose melting points are so low that they melt when held in the hand.
उत्तर
Sodium and cesium are the two metals whose melting points are so low that they melt when held in hand.
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संबंधित प्रश्न
Give an example of a metal which can be easily cut with a knife.
State five uses of non-metals.
Name two physical properties of carbon in which it's behaviour is not as expected from it's classification as non-metal.
Metals are said to be shiny. Why do metals generally appear to be dull? How can their brightness be restored?
Name:
a metal which is a bad conductor of heat and electricity
`Mg -— → Mg^(2+)`
Explain how the activity series accounts for each of the following:
reaction with water
Gold and silver are used to make jewellery. Give reason
Describe a simple experiment to prove that a copper wire conducts electricity, but a piece of coal does not.
Match the following:
| 1. | Non-metals | a. | Silicon |
| 2. | Metals | b. | fire extinguisher |
| 3. | Metalloids | c. | dull and soft |
| 4. | Oxygen | d. | hard and shiny |
| 5. | Water | e. | supports fire |
