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प्रश्न
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
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उत्तर
Silver is best conductor of electricity.
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संबंधित प्रश्न
Give reasons for the following.
Sodium and potassium are stored in kerosene.
Write the name and formula of a metal hydride.
State one use of the following metal:
Gold
The atomic number of an element X is 12.
- What must an atom of X do to attain the nearest inert gas electron configuration?
- Which inert gas is nearest to X?
The electrical conductivity and melting point of an alloy is ______ than that of pure metals.
How are the properties of an alloy different from those of the constituent elements?
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
Write name.
Alloy of sodium with mercury.
What is it made from? Why?
Electric cables
State a specific reason for using copper in electrical cables
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
An amorphous substance which turns from pale green to black on strong heating evolving a colourless, acidic gas as the only gaseous product.
The minerals from which the metal can be separated economically are called _______.
When a copper coin is dipped in the solution of silver nitrate, it shows a lustre on its surface. Explain this process with the help of a chemical equation.
Which one of the following metals do not react with cold as well as hot water?
An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.
Metals and non–metals are used for making ______, ______ and ______.
All gases are ______.
Metals have high melting points.
