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प्रश्न
Name the metals present in the following alloys
Bronze
उत्तर
Bronze— Copper and tin
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संबंधित प्रश्न
Give an example of a metal which is a liquid at room temperature.
Explain the meaning of malleable.
State why concentrated sulphuric acid is not used for drying ammonia gas
For the electro-refining of copper: Write the reaction that takes place at the anode
Which property of copper and aluminium makes them suitable for making electric wires?
Which property of copper metal is utilised in making thin wires?
Name two physical properties of carbon in which it's behaviour is not as expected from it's classification as non-metal.
Name a non-metal which is extremely hard.
Name a metal that can be cut with knife
Give reasons
Copper is used in making electric cables.
Write ‘True’ or ‘False’ in front of following statement.
Stainless steel is used for making power transmission wires.
Name a gaseous non-metal,. having greenish yellow colour.
State two important uses of following non-metals
Uses of nitrogen
Give the balanced reactions for the following:
Sodium is dropped in water
Give the balanced reactions for the following:
Magnesium reacts with boiling water
Give a short account of heating effect on metal carbonates based on the activity series ?
The table below compares some properties of metals and non-metals. Write down the missing
statements (i) to (iv) :
| Metals | Non-metals |
| (i) ………………….. | Poor conductors of heat |
| (ii) Malleable | …………………… |
| (iii) Form positive ions | …………………… |
| (iv) ………………… | Form acidic oxides |
A metallic oxide which cannot be reduced by normal reducing agents:
Give a reason why – properties of metals are related to their activity or reactivity series of metals. Explain the same with reference to potassium and iron in the series.
Generally, non-metals are not lustrous. Which of the following non-metal is lustrous?
