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NCERT FINGERTIPS-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Assertion And Reason
- Assertion : Minerals are naturally occurring chemical substances in t...
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- Assertion : In froth floatation method, collectors such as pine oil or...
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- Assertion : Gold and silver are extracted from their native ores by le...
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- (A) Roasting is a process in which the ore is heate in presence of air...
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- Assertion : Reduction of a metal oxide is easier if the metal formed i...
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- Assertion : Sulphide ores are converted to oxides before reduction. R...
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- Assertion : Magnesium metal is not used for the reduction of alumina i...
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- Assertion : In the metallury of aluminium , purified Al(2)O(3) is mixe...
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- Assertion: Limestone addes in the blast furance decomposes to give CaO...
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- Assertion : Tin is refined by liquation method. Reason : Tin has low...
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- Assertion : In electrolytic refining of metal, impure metal is made ca...
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- Assertion: Zone refining method is used to produce pure metals which a...
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- Assertion: Nickel is purified by reaction it with CO. Reason: Impur...
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- Assertion : van Arkel method is used for refining of Zinc. Reason :...
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- Assertion : Chromatography in general involves a mobile (a gas, a liqu...
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