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P-Block Elements Test - 2

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P-Block Elements Test - 2
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Reaction that involves atmospheric oxygen are never promoted by

    Solution

    Nitric oxide is obtained at a very high temperature by the atmospheric oxygen and nitrogen

    N2 + O2  →  2NO

    The correct answer is: low temperatures

  • Question 2
    1 / -0

    Silicon carbide is used as a / an

    Solution

    Abrasive is tough material used for sharpening and grinding the uneven surfaces and silicon carbide is used for grinding glass.

    The correct answer is: abrasive

  • Question 3
    1 / -0

    Which one of the following is pseudohalide?

    Solution

    It behaves like halogen giving white ppt. with silver nitrate.

    The correct answer is: IF5

  • Question 4
    1 / -0

    Minimum flocculation value is of

    Solution

    Pb+4 ion, having maximum +ve charge, will have minimum flocculation value.

    The correct answer is: Pb+4

     

  • Question 5
    1 / -0

    By the action of ______ bromine can be liberated from KI solution

    Solution

    Chlorine water will liberate bromine from KBr.

    Cl2 + H2O → 2HCl + O

    2Br- + 2H+ + O → Br2 + H2O

     

  • Question 6
    1 / -0

    Aluminium vessels should not be washed with materials containing

    Solution

    Na2CO3 + 2H2O  →  2NaOH + H2O + CO2

    2NaOH + 2Al + 2H2O  →  2NaAlO2 + 3H2

    (Soluble)

    The correct answer is: washing soda reacts with Al to form soluble aluminate

     

  • Question 7
    1 / -0

    Which of the following element has highest first ionization potential?

    Solution

    Nitrogen has stable half filled electronic configuration; hence it has highest first ionization potential.

    The correct answer is: nitrogen

     

  • Question 8
    1 / -0

    Xenon forms compounds only with

    Solution

    Xenon forms compounds only with oxygen & fluorine due to their small sizes and high electro negativity.

    The correct answer is: oxygen and fluorine

  • Question 9
    1 / -0

    Iron when treated with conc. nitric acid

    Solution

    Fe + 2HNO3  →  Fe(NO3)2 + H2O\

    The correct answer is: gives ferrous nitrate

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