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प्रश्न
Write ‘True’ or ‘False’ in front of following statements.
Non-metals are poor conductors of electricity.
पर्याय
True
False
उत्तर
True. Except for graphite.
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संबंधित प्रश्न
Which of the following statements is correct?
Write the balanced chemical equation to prepare ammonia gas in the laboratory by using an alkali.
Name one metal which has a low melting point.
Name the non-metal which is used as a rocket fuel (in liquid form).
State any three differences between the physical properties of metals and non-metals.
Name a non-metal that is lustrous
Name the metals present in the following alloys
Bronze
Give four differences between metals and non-metals with reference to their:
- Melting point and boiling point
- The conductivity of heat and electricity
- Malleability
- Solubility
Write ‘True’ or ‘False’ in front of following statement.
Stainless steel is used for making power transmission wires.
Tick (√) the most appropriate answer.
Copper metal is used in :
Name a non-metal which is good conductor of electricity.
State the composition of given alloy:
Bronze
`N+—→ N^3-`
Name:
Two metals which are liquid at room temperature
Make pairs of substances and their properties
| Substance | Property |
| a. Potassium bromide (KBr) | 1. Combustible |
| b. Gold | 2. Soluble in water |
| c. Sulphur | 3. No chemical reaction |
| d. Neon | 4. High ductility. |
Match the following:
| Column A | Column B |
| (a) Helium | (1) Electric bulb |
| (b) Neon | (2) Thermometer |
| (c) Argon | (3) Semiconductor |
| (d) Germanium | (4) Weather balloons |
| (e) Mercury | (5) Advertising signboards |
A form of non-metal which has high ductility is
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?
