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CHETAN PUBLICATION-METALLURGY-1. (B) CHOOSE AND WRITE THE CORRECT OPTIONS
- is not metalloid.
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- has the highest melting point.
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- is the most reactive metal .
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- is the formula is cuprite.
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- cassiterite is an ore of
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- Metal oxides are generally in nature.
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- is a non metal which conducts electricity.
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- is an oxide which is amphoteric.
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- The reactivity of metals with dil HCl in decreasing order is
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- Cinnabar is an ore of
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- The main consituent of bauxite is
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- Which method, is used for the purfication of more reactive metals ?
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- Substance used to decrease the melting point of alumina in Halls proce...
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- Galvanisation is a method of protecting iron from rusting by coating i...
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- Copper reacts with moist carbon-dioxide in air and slowly loses its sh...
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- react with dil. HNO(3) to evolve hydrogen gas.
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- Silver articles become black on prolonged exposure to air. This is due...
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- In tinning a layer of molten is deposite on metals.
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