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CHHAYA PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-QUESTION - ANSWER ZONE FOR BOARD EXAMINATION (VERY SHORT ANSWER TYPE )
- Give an example of each of the following : (1) Liquid metal, (2) N...
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- Give example of two metals one of which is available in nature in the ...
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- Arrange the four abundant elements in the order of their decreasing ab...
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- Give an example of each of the following : (a) a light metal
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- Give an example of each of the following : (b) a heavy metal
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- Out of haematite (Fe(2)O(3)) and iron pyrites (FeS(2)), which one is t...
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- What type of ores are generally roasted ? Why ?
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- Cu and Ag exist as sulphides though they occupy lower positions in the...
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- Why do some metals occur in the native state?
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- What type of ores are concentrated by electromagnetic separation?
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- If the impurities are lighter than the ore, mention the process of the...
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- Explain why the concentraction of the sulphide ore is usually carried ...
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- Name the chief ores of Cu, Fe and Al. What are the methods employed fo...
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- Metal sulphides occur mainly in rocks and metal halides in lakes and s...
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- Write the name of a suitable flux to remove SiO(2) present as gangue.
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- How are the elements occupying higher positions of the electrochemical...
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- Out of C and CO, which is a better reducing agent for FeO in the lower...
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- CO cannot be used for the reduction of ZnO- why?
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- How cany the feasibility of reduction of a metal oxide by a metal be p...
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- Name an alloy of Cu that is used for making utensils.
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