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Metals and Non-...

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  • Question 1
    1 / -0

    What is the colour of the coating formed on copper when it reacts with moist carbon dioxide?

  • Question 2
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    Which of the following gases is produced during roasting?

  • Question 3
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    Which of the following gases is produced during calcination?

  • Question 4
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    Which of the following is a major source of metals?

  • Question 5
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    Some minerals contain high percentage of a particular metal. These minerals are known as 

  • Question 6
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    Which of the following elements is used as a reducing agent for obtaining zinc from zinc oxide?

  • Question 7
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    Silver articles become __________ after some time, when exposed to air.

  • Question 8
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    The elements or compounds which occur naturally in the earth's crust are known as 

  • Question 9
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    Which of the following is a dehydrating agent?

  • Question 10
    1 / -0

    Which of the following contains some soluble salts such as sodium chloride, magnesium chloride, etc?

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