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प्रश्न
_______ is the least reactive metal.
पर्याय
silver
sodium
zinc
gold
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उत्तर
Gold is the least reactive metal.
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संबंधित प्रश्न
A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset, but after a futile argument, the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?
Name the following:
The property possessed by metals by which they can be beaten into sheets.
How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
The process by which sulphide ore is concentrated.
In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.
How is zinc extracted from its carbonate ore (calamine)? Explain with equations.
Define the term gangue.
Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?
The articles made of silver metal become dark on prolonged exposure to air. This is due to the formation of a layer of its ______.
Which metal can be extracted from the following ore?
Calamine
Give the principles of the froth floatation process.
Give the principles of electromagnetic separation.
Give reasons, why aluminum is used in:
In making ships
Name the following:
The process in which an ore is heated in air so that oxygen gets added to it to form the oxides.
Complete the incomplete statement with missing words:
Metals are ______ while non-metals are ______ conductors of heat.
Name : The metal which is liquid at room temperature.
Which one of the following is not true of metal :
Metals form non-polar covalent compounds
choose the most appropriate term to match the given description.
Heating of the ore in the absence of air to high temperature
Explain the reactions of nonmetals with water with the help of examples.
