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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
Name two processes which provide the best evidence for the motion of particles in matter.
Name the property which enables metals to be drawn into wires.
Which type of elements, metals or non-metals, show the property of brittleness ?
Fill in the following blanks with suitable words :
The elements which are sonorous are called ..........................
Give reason why graphite is used for making elecrode in a dry cell.
Name a metal which has no fixed shape.
Which of the following are not compounds ?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :
Hydrogen, Oxygen, Steam, Chlorine
State whether the following statement is true or false :
Sponge is an example of solid sol.
Define Sol and give one example.
What is meant by a solution?
Fill in the following blanks with suitable words :
The gases of air can be separated by fractional distillation of liquid air because they have different..............
How is the impurity of iron present in several substances removed in industries ?
The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.
(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and (ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?
Name one pair of liquids which can be separated by using a separating funnel.
Why wires cannot be drawn from materials such as stone or wood?
The phenomenon of Evaporation takes place at the ______ of a liquid.
Define the term matter.
