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प्रश्न
Which metal is extracted from calamine ore?
उत्तर
Zinc metal is extracted from calamine ore. Calamine ore is a carbonate ore. The compound present in it is zinc carbonate. Its formula is ZnCO3
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संबंधित प्रश्न
In the extraction of aluminium: Name the process of concentration of bauxite.
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
Calamine ore can be used to extract one of the following metals. This metal is:
(a) copper
(b) mercury
(c) aluminium
(d) zinc
Manganese metal is extracted from manganese dioxide by a reduction process by making use of:
(a) carbon
(b) hydrogen
(c) electrolysis
(d) aluminium
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.
(a) What is metal A?
(b) What is metal C?
(c) Name the substance B.
(d) Name the substance D.
Some metallic oxides can be reduced by hydrogen, carbon and carbon monoxide and some cannot. Explain.
Complete the incomplete statement with missing word:
Metals form positive ions while non- metals ______.
How many valence electrons are present in non- metals?
Write the name.
The process of strong heating of carbonate ores in insufficient air–
Explain in brief types of extraction of less reactive metals according to their reactivity.
