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P - Block Eleme...

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  • Question 1
    4 / -1

    Which of the following does not contain silicon?

  • Question 2
    4 / -1

    Carborundum is

  • Question 3
    4 / -1

    Moderate electrical conductivity is shown by

  • Question 4
    4 / -1

    CO is poisonous gas, antidote for CO poisoning is

  • Question 5
    4 / -1

    Aluminium is extracted from alumina (Al2O3 ) by electrolysis of a molten mixture of :

  • Question 6
    4 / -1

    In the preparation of amorphous silicon, HF acid is used to remove

  • Question 7
    4 / -1

    Water gas is

  • Question 8
    4 / -1

    The purest form of coal is

  • Question 9
    4 / -1

    Pb reacts with dilute HNO3 produces

  • Question 10
    4 / -1

    Which of the following is used for making optical instruments ?

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