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प्रश्न
Name a non-metal which is a good conductor of electricity.
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उत्तर
Graphite is a non-metal that is a good conductor of electricity.
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संबंधित प्रश्न
Define the following term of Atom .
What is the general name of the materials which contain at least two pure substances and show the properties
of their constituents ?
What elements do the following compounds contain ?
Sugar, Common salt
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 metal which is yellow in colour.
Draw a flow-chart for the schematic representation of different types of matter.
There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.
- What type of substance could X be ? Name one substance like X.
- What type of substance could Y be ? Name one substance like Y.
- What type of substance could Z be ? Name one substance like Z.
- Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z ?
- Name the three groups into which all the substances like Y are divided on the basis of their properties.
Define Foam Give one example.
What difference in the property of two miscible liquids enables their separation by fractional distillation ?
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
Describe a method to separate a mixture of common salt and sand.
What is chromatography ? State its two applications.
How is water purified on a large scale at water works ? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply ?
Asmita went to buy an earthen pot. There she saw many things kept for sale.
How did she identify what she needed?
Justify your answer.
| Figure 1 | Figure 2 | Figure 3 |
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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?
A standard sheet of paper is about ______ of atoms thick
Give some examples of the Tyndall effect observed in your surroundings?
Give an example of a molecule.
Define the term matter.
