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All ores are minerals while all minerals...

All ores are minerals while all minerals are not ores because :

A

minerals are complex compounds

B

the minerals are obtained from mines

C

the metal cannot be extracted economically from all the minerals

D

all of the above are correct

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(3) Metals can not be extracted from all the minerals that is why all minerals are not ores.
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(a) All ores are minerals but all minerals are not ores. Justify. (b) An iron knife kept in blue copper sulphate solution turns the blue solution into light green. Explain. (c ) An athlete won a bronze medal in a race competition. After some days, he found that the medal had lost its lustre due to the formation of a greenish layer on it. Name the metals present in the medal. What is the reason for the formation of a greenish layer on its surface ?

Statement-1: All ores are minaerals but all minerals are not ores. Statement-2: Minerals are obtained from mines.

Assertion (A): A mineral is called ore, when metal is extracted from it conveniently and economically. Reason (R): All ores are minerals but all minerals are not ores.

A mineral is called an ore if :

A : All the diverse minerals element found in plants are not essential for them. R : Some plants accumulate heavy and toxic minerals such as gold and selenium from the soil.

NARAYNA-METALLURGY-STATEMENT TYPE QUESTOINS
  1. All ores are minerals while all minerals are not ores because :

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  2. Assertion: All minerals are ore. Reason: Ores are minerals from whic...

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  3. Metals of high purity are obtained by zone refining. Impurities are ...

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  4. (A) Au,Pt,Ag etc are found in free state (R ) The metals which are n...

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  5. (A) Roasting is a process in which the ore is heate in presence of air...

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  6. During the electrolysis of aqueous sodium chloride the cathodic reacti...

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  7. The ore that is concentrated by froth floatation process is

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  8. Assertion: Ag and Au are extracted by leaching the ores with a dilute ...

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  9. (A) Alumina has hgih condutivity (R ) The mixture of alumia and cryo...

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  10. What is the percentage of carbon in pig iron and cast iron ?

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  11. Steel contains more carbon than wrought iron

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  12. Aluminium metal is generally used for the extraction of chromium and m...

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  13. Statement-1:Electrolytic reduction of alumina to aluminium by Hall-Her...

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  14. In Froth floatation process for, pine oil functions oil functions as:

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  15. Silver is refined by cupellation process, the process removes the impu...

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  16. Statement-1:Magnesia and quick lime are used as basic flux. Statemen...

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  17. The ore that is concentrated by froth floatation process is

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  18. Assertion : Nickel can be purified by Mond process. Reason : Ni(CO)(...

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  19. Zinc is used to protect corrosion of iron because

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  20. Cinnabar (HgS) and galena (PbS) on roasting give their respective meta...

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  21. Statement-1: Silicones are used as high class industrial insulators. ...

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