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Give an appropriate answer for the following statement- Electric heaters, toasters, dental restoration equipments are made up-

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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
  1. Give an appropriate answer for the following statement- Electric heate...

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  2. True of False : Copper is found both in free as well as in combined st...

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  3. True of False : All minerals are ores put all ores cannot be minerals.

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  4. True of False : The minerals siderite, magnetite and haematite contain...

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  5. True of False : Flux combines with slag to form gangue.

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  6. True of False : In calcination, the ore is heated with calcium.

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  7. True of False : Silver is extracted by by hydrometallurgy.

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  8. Zone refining is used for the

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  9. True of False : The metals Ag, Au and Hg are extracted by pyrometallur...

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  10. Chromium steel is the mixture of-

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  11. Which of the following reagents can be used to convert acetamide into ...

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  12. Complete the missing links : The earthly and silicious impurities whic...

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  13. The most abundant element in the earth's crust is:

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  14. Purest form of iron is

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  15. State whether the statement is true or false- Lunar caustic is the com...

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  16. Zirconium is best refined by ......... method.

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  17. In blast furnace, iron oxide is reduced by

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  18. Nichrome metal alloy is a mixture of-

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  19. The naturally occurring chemical substances in the form of which metal...

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  20. Copper can be extracted from

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  21. Fill in the blanks- alloy is made up of 14% of manganese and 85% of ir...

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