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प्रश्न
With reference to the physical properties of metals and non-metals, state the following exception.
a non-metal which sublimes and is non-lustrous
उत्तर
A non-metal which sublimes and is non-lustrous is iodine.
Explanation:
- Sublimation: Iodine can change directly from a solid to a gas without passing through the liquid state.
- Non-lustrous: While most non-metals are non-lustrous, iodine is an exception as it exhibits a slight metallic sheen, but overall, it is still considered non-metallic in its properties.
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संबंधित प्रश्न
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 |
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Which property of copper and aluminium makes them suitable for making cooking utensils and boilers?
Name two metals which are used for making electric wires.
Name the non-metal which is used to convert vegetable oil into vegetable ghee (solid fat).
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State one use of Sulphur.
State any five physical properties of non-metals.
"Is malleable and ductile". This best describes:
(a) a metal
(b) a compound
(c) a non-metal
(d) a solution
(a) Give the names and formulae of one metal chloride and one non-metal chloride.
(b) State an important property in which these metal chloride and non-metal chloride differ.
(c) Why do they differ in this property?
Name a non-metal that is lustrous
`Cl +e- → —`
Name:
the compound responsible for green deposit on the surface of copper
Name a non-metal which shows reducing property.
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With reference to the physical properties of metals and non-metals, state the following exception.
A non-metal which has low tensile strength
Select the appropriate option for the following statement:
The element which is noble gas and radioactive in nature.
Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?
