Advertisements
Advertisements
प्रश्न
Differentiate between “minerals” and “ores”.
उत्तर
Minerals are naturally occurring chemical substances containing metals. They are found in the Earth’s crust and are obtained by mining.
Ores are rocks and minerals viable to be used as a source of metal.
For example, there are many minerals containing zinc, but zinc cannot be extracted profitably (conveniently and economically) from all these minerals.
Zinc can be obtained from zinc blende (ZnS), calamine (ZnCO3), Zincite (ZnO) etc.
Thus, these minerals are called ores of zinc.
APPEARS IN
संबंधित प्रश्न
Write the names and chemical formulae of any one ore of zinc.
Mention names and formulae of two ores of alumunium.
What is the role of silica in the extraction of copper?
Which of the ores mentioned can be concentrated by magnetic separation method?
Define Leaching.
Write the names and chemical formulae of any ‘two’ minerals of aluminium.
Explain the following methods to protect metals from corrosion:
Galvanization
Draw a neat, well labelled diagram of electrolytic cell for extraction of aluminium
Why does copper obtained in the extraction from copper pyrites have a blistered appearance?
What is 'copper matte' ?
Copper has the face centred cubic structure. The coordination number of each ion is:
What happens when a nickel rod is dipped into a copper sulphate solution? Justify your answer.
`[E_((Ni^(+2))/(Ni))^0 = -0.25"v" and E _(("Cu"^(+2))/("Cu"))^0 = +0.34"v"]`
Bauxite has the composition
Metals which occur in their native state in nature:
Which among the following statement is correct?
Carbonate ore of iron is ____________.
Identify a mineral for the major source of boron from the following list?
The important ore of iron is:-
When compared to ΔG° for the formation of Al2O3 ΔG° for the formation of Cr2O3 is