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Question
Name a metal used in making electric cables
Solution
Copper
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RELATED QUESTIONS
Some properties are listed in the following Table. Distinguish between metals and non-metals on the basis of these properties
| Properties | Metals | Non-metals |
| 1. Appearance | Lustrous | Dull |
| 2. Hardness | Hard | Soft |
| 3. Malleability | Can be beaten into thin sheets | Cannot be beaten into thin sheets |
| 4. Ductility | Can be drawn into wires | Cannot be drawn into wires |
| 5. Heat Conduction | Good conductors of heat | Poor conductors of heat |
| 6. Conduction of Electricity | Good conductors of electricity | Poor conductors of electricity |
Give reasons for the following.
Aluminium foils are used to wrap food items.
Match the substances given in Column A with their uses given in Column B.
| A | B | ||
| 1 | Gold | a | Thermometers |
| 2 | Iron | b | Electric wire |
| 3 | Aluminium | c | Wrapping food |
| 4 | Carbon | d | Jewellery |
| 5 | Copper | e | Machinery |
| 6 | Mercury | f | Fuel |
Which metal foil is used for packing some of the medicine tablets?
State any five physical properties of non-metals.
The electronic configurations of three elements A, B and C are as follows:
| A | 2, 8, 1 |
| B | 2, 8, 7 |
| C | 2, 4 |
(a) Which of these element is a metal?
(b) Which of these elements are non-metals?
(c) Which two elements will combine to form an ionic bond?
(d) Which two elements will combine to form a covalent bond?
(e) Which element will form an anion of valency 1?
Name the metals present in the following alloys
Bronze
Name one metal which is a liquid at room temperature
Name:
a metal which can float on water
`M+ HCl → MCl_2 +—`
Name:
two metallic oxides which are acidic
Name:
a non metal which can form a positive ion
Explain how the activity series accounts for the following:
occurrence of metals
Give the balanced reactions for the following:
Red hot iron reacts with steam
Why is hydrogen kept in the metal activity series?
State whether the statement given below is true or false. If false write the correct statement.
Lead pencils contain lead.
Which non-metal is essential for our life and all living beings?
Which of the following non-metals is a liquid?
A non-metal A is an important constituent of our food and forms two oxides B and C. Oxide B is toxic whereas C causes global warming
- Identify A, B and C
- To which Group of Periodic Table does A belong?
Non-metals are usually good conductors of heat and electricity.
