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Give reasons for the following :
Sodium and Potassium are stored in kerosene?
Sodium and Potassium are stored in kerosene because they are very reactive and quickly react in air.
Iron is ________ reactive than copper.
Metals react with acids to produce ________ gas.
Generally, non-metals react with acids.
Sodium is a very reactive metal.
Copper displaces zinc from zinc sulphate solution.
Carbon can be drawn into wires.
Some properties are listed in the following table. Distinguish between metals and non-metals on the basis of their properties.
|
Properties |
Metals |
Non-metals |
|
1. Appearance 2. Hardness 3. Malleability 4. Ductility 5. Heat Conduction 6. Conduction of Electricity |
Give reasons for the following :
Aluminium foils are used to wrap food items.
Give reasons for the following :
Immersion rods are made up of metallic substances.
Give reasons for the following :
Copper cannot displace zinc from its salt solution.
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