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प्रश्न
Write the name.
Strongly heating carbonate ores in insufficient air -
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उत्तर
Calcination
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संबंधित प्रश्न
Name the following:
Main ore of aluminium.
Name one metal which is extracted by:
Electrolytic reduction.
Bronze is an alloy of copper and ______.
Explain giving equation, what happens when:
ZnCO3 is heated in the absence of air?
What is the difference between a mineral and an ore?
Name three other metals which are extracted in a manner similar to sodium.
Which of the following is an ore of mercury metal?
Manganese metal is extracted from manganese dioxide by a reduction process by making use of ______.
A metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence of air.
- Name the metal and write its chemical symbol.
- Write the name and formula of the sulphide ore.
- Give the equations of chemical reactions involved in the production of metal from its sulphide ore.
- Name a common device in which this metal is used.
- Can this metal displace copper from copper sulphate solution? Why?
When an object made of metal A is kept in air for a considerable time, it loses its shine and becomes almost black due to the formation of a layer of substance B. When an object made of another metal C is kept in damp air for a considerable time, it gets covered with a green layer of substance D. Metal A is the best conductor of electricity whereas metal C is the next best conductor of electricity.
- What is metal А?
- What is metal C?
- Name the substance B.
- Name the substance D.
- What type of chemical can be used to remove the green layer from metal C and clean it? Why?
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Name the electrode, from which aluminium collected.
Name the following:
Two metals which are found in the free or native state.
Name the following:
The process of heating a substance very strongly in such a way that it does not combine with oxygen.
What is meant by concentration of ores?
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Define calcination.
Zinc blende is converted to oxide by ______ process.
Right or wrong sentence?
The electrolysis of alumina combines fluorite and cryolite to increase the solubility in the precipitation method.
