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D and F Block Elements Test - 7

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D and F Block Elements Test - 7
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  • Question 1
    1 / -0

    Find the complex ion formed in this reaction. Reaction: Excess of CN- is added to CuSO4 solution.

    Solution

    2Cu2+ + 4CN- → Cu2(CN)2 + (CN)2 ;

    Cu2(CN)2 + 6CN → 2[Cu(CN)4]3-

     

  • Question 2
    1 / -0

    The compound which formed on adding Na2CO3 to CuSO4 solution is?

    Solution

    2 CuSO4 + H2O + 2 Na2CO3 → 2 Na2SO4 + Cu2(OH)2CO3 + CO2

     

  • Question 3
    1 / -0

    Find the gas which evolved in the reaction. Reaction: On heating AgNO3 above its melting point.

    Solution

    2AgNO3 → 2AgNO2 + O2 (above the melting point)

     

  • Question 4
    1 / -0

    Which of the following compound sublimes on heating?

    Solution

    Mercury(II) Chloride sublimes on heating.

  • Question 5
    1 / -0

    Red precipitate is obtained when AgNO3 is added to

    Solution

    Na2S2O3 + 2 AgNO3 → Ag2S2O3 + 2 NaNO3

    Red ppt. obtained in this reaction.

     

  • Question 6
    1 / -0

    Zinc oxide, a white powder, turns yellow on heating and again turns white on cooling. This is because of

    Solution

    Colour changes occurs due to reversible loss of some oxide ion from the lattice sites leaving behind the electrons.

  • Question 7
    1 / -0

    Choose the correct covalent character of the following chlorides follow the order.

    Solution

    Covalent character increases down the group.

  • Question 8
    1 / -0

    The metal 'X' of the following dissolve in hot NaOH solution to form the compound 'Y'. X and Yare respectively

    Solution

    Zinc metal forms Sodium zincate when react with hot NaOH solution.

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