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प्रश्न
What is an amalgam?
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उत्तर
Amalgam is an alloy of mercury with one or more metals. Sodium along with liquid mercury is known as sodium amalgam. Amalgam of mercury with tin, silver and zinc is widely used in dental filling.
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संबंधित प्रश्न
Give reasons for the following.
Sodium and potassium are stored in kerosene.
What elements are present in steel? How are the properties of steel different from those of pure iron?
Name a metal which is best conductor of electricity :
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Hydrochloric acid,
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Oxygen
Write name.
The nonmetal having electrical conductivity.
Give reasons for the following:
Most metals conduct electricity well.
Name the following:
A metal used in flexible pipes.
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
