Advertisements
Advertisements
प्रश्न
Name a non-metal which is a good conductor of electricity.
Write one example of a non-metal that is a good conductor of electricity.
Name the following:
Non-metal which is a conductor of electricity.
Advertisements
उत्तर
Graphite
APPEARS IN
संबंधित प्रश्न
Fill in the following blank with suitable words :
The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................
Which of the following substances are elements ?
Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.
Name a non-metal :
- which is lustrous
- which is required for combustion
- whose one of the allotrophic forms is a good conductor of electricity. Name the allotrope.
- other than carbon which shows allotropy
- which is known to form the largest number of compounds
Draw a flow-chart for the schematic representation of different types of matter.
Which of the following are compounds ?
- CO
- No
- NO
- Co
How would you prepare a saturated solution of sodium chloride in water at 25°C ? What will happen if this solution is cooled to 10°C ?
Which of the following represents the solubility of sugar in water at 20°C ?
Which of the following can be called a suspension ?
The solubility of ammonium chloride in water at various temperatures is given below :
| Temperature | : | 10°C | 20°C | 40°C | 60°C | 80°C |
| Solubility | : | 24 g | 37 g | 41 g | 55 g | 66 g |
What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at 40°C ?
Name the source from which nitrogen and oxygen are obtained on a large scale.
Name the process by which all the dye can be recovered from black ink.
The material which is added to water during purification process at the water works so as to disinfect it is :
If there is a sudden shower, we take shelter under a roof at the roadside. Even though the rain does not fall on us directly, we get wet to some extent. Why ?
Justify your answer.
| Figure 1 | Figure 2 | Figure 3 |
 |
 |
 |
The arrangement of particles in three different phases of matter is shown above.
- Which state is represented by Fig. 1?
- In which state will the inter-particle attraction be maximum?
- Which one of them cannot be contained in an open vessel?
- Which one can take the shape of its container?
The property which allows the metals to be hammered into their sheets is ______.
The non S I and S I units of some physical quantities are given in column A and column B respectively. Match the units belonging to the same physical quantity:
| (A) | (B) | ||
| (a) | degree celsius | (i) | kilogram |
| (b) | centimetre | (ii) | pascal |
| (c) | gram per centimetre cube | (iii) | metre |
| (d) | bar | (iv) | kelvin |
| (e) | milligram | (v) | kilogram per metre cube |
The most reactive metal is ______.
Evaporation is always accompanied by ______ in temperature.
