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True of False : Copper is found both in ...

True of False : Copper is found both in free as well as in combined state in nature.

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Knowledge Check

  • Metal always found in free state is

    A
    gold
    B
    silver
    C
    copper
    D
    sodium
    • MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
    1. True of False : Copper is found both in free as well as in combined st...

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

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

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

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

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

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    7. Zone refining is used for the

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

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    9. Chromium steel is the mixture of-

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

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

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

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    13. Purest form of iron is

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

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    15. Zirconium is best refined by ......... method.

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    16. In blast furnace, iron oxide is reduced by

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    17. Nichrome metal alloy is a mixture of-

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

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    19. Copper can be extracted from

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

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