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प्रश्न
Write ‘True’ or ‘False’ in front of following statements.
Non-metals are poor conductors of electricity.
विकल्प
True
False
उत्तर
True. Except for graphite.
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संबंधित प्रश्न
Why are metals used for making cooking vessels?
State five uses of non-metals.
State any five physical properties of non-metals.
Name a metal as precious as gold
Tick (√) the most appropriate answer.
Sodium amalgam is prepared by dissolving sodium in :
Tick (√) the most appropriate answer.
A metal which is a poor conductor of electricity is:
Name:
Two metals which are liquid at room temperature
Name:
two metals which are soft
Name:
the compound responsible for green deposit on the surface of copper
Give the effect of heat on metal oxides based on the activity series ?
Name the following:
or
With reference to the physical properties of metals and non-metals, state the following exception.
A metal which is liquid at room temperature.
A metallic oxide which cannot be reduced by normal reducing agents:
Explain the following:
Metals like calcium and magnesium are never found in their free state in nature.
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 |
Differentiate between metals and non-metals with reference to –
(a) number of electrons in outer or valence shell
(b) formation of cation and anion
(c) reaction with dilute acids.
Complete the statement given below, by filling in the blank with the correct word:
The ability of a metal to produce a reasonant sound ______.
_______ is good conductor of heat but bad conductor of electricity.
Which of the following non-metal is lustrous?
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?
