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प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Graphite is used in making filaments of electric bulb.
विकल्प
True
False
उत्तर
False.
Tungsten is used in making filaments of electric bulb.
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संबंधित प्रश्न
Explain the meaning of malleable.
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 |
Can you store lemon pickle in an aluminium utensil? Explain.
Name one property which is characteristic of metals.
Name a non-metal having a very high melting point.
Name the metal which is used in making thermometers.
State three reasons (of which at least one must be chemical) for believing that sodium is a metal.
State three reasons (of which at least one must be chemical) for believing that sulphur is a non-metal.
Fill in the blank
Tungsten metal is a poor conductor of _______
State two important uses of following non-metals
Uses of nitrogen
Name:
a metal which can float on water
`M+ HCl → MCl_2 +—`
`Mg +H_2SO_4 → —+ — `
Why do gold ornaments look new even after several years of use?
Identify the odd term.
A metallic oxide which cannot be reduced by normal reducing agents:
The sound of one metal colliding with another makes a noise, this property is called as _______.
Identify who I am!
Amphoteric oxide forming metal- _______
Generally, non-metals are not lustrous. Which of the following non-metal is lustrous?
