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The s-Block Ele...

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  • Question 1
    1 / -0

    When sodium is heated in moist air, the ultimate product obtained is:

  • Question 2
    1 / -0

    The re-activity of Ca, Sr, Mg and Ba with water follow the order :

  • Question 3
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    Alkali metals readily react with oxyacids forming corresponding salts like $${ M }_{ 2 }{ CO }_{ 3 }$$, $${ M }H{ CO }_{ 3 }$$, $${ M }N{ O }_{ 3 }$$, $${ M }_{ 2 }{ SO }_{ 4 }$$, etc. with evolution of hydrogen. They also dissolve in liquid $${ NH }_{ 3 }$$ but without the evolution of hydrogen. The color of its dilute solution is blue but when it is heated and concentrated then its color becomes bronze.

    Which of the following statement about the sulphate of alkali metal is correct :

  • Question 4
    1 / -0

    Select the correct order of ionic conductance of the following cations in an aqueous solution.

  • Question 5
    1 / -0

    Which of the following has the maximum coordinate number not more than 4?

  • Question 6
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    Among the following hydroxides, the one which has the lowest value of $$K_{sp}$$at ordinary temperature is:

  • Question 7
    1 / -0

    Which of the following does not decompose water?

  • Question 8
    1 / -0

    A metal $$M$$ forms water-soluble sulphate $$MSO_4$$, water-insoluble hydroxide$$M(OH)_2$$ and oxide $$MO$$ which becomes inert on heating. The hydroxide is soluble in $$NaOH$$. Then $$M$$ is:

  • Question 9
    1 / -0

    Which of the following alkaline earth metal does not impart characteristic colour to flame?

  • Question 10
    1 / -0

    Which of the following alkaline earth metal indirectly form a polymeric hydride with three centre bond?

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