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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS -ADDITIONAL QUESTIONS & ANSWERS ( FILL IN THE BLANKS )
- is the science of extracting metals from ores and modifyig metals...
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- The melting point of copper is .
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- Copper reacts with dil. HNO3 with the liberation of gas.
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- is the process of purification of metal.
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- Clay and bauxite are the two minerals to .
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- The rocky impurity associated with an ore is called or .
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- Siderite is a ore .
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- Galena is a ore .
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- Zinc blende is a ore .
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- process depends on the preferential wettability of the ore with oil...
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- ore is found in Coimbatore and Salem district.
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- is found in Madurai and Dindugal.
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- The best conducting metal is .
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- Matte is mixture of .
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- 98% pure copper is called as.
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- Electromagnets , springs and anchors are prepared from .
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- is the gradual destruction of metals by chemical or electrochemical ...
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- The process of of coating zinc over a metal is called as .
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- The easily corrodible metal is called as to act as a anode ensuring...
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- Corrosive action in the presence of moisture is called .
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