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The s-Block Ele...

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  • Question 1
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    Which of the following is/are correct statement(s)?

  • Question 2
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    Directions For Questions

    Question given below are based on the above shown values of hydration energy and lattice energy:

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     Hydration energy
    $${\Delta H}_{hydra}.(kJ \,mol^{-1})$$    		Lattice energy 
    $${\Delta H_u}(kJ \,mol^{-1})$$
     $$Li^+$$ -499LiCl-840 
     $$Na^+$$-390NaCl-776 
     $$K^+$$-305KCl-703 
     $$Cl^-$$-382 
    Which salt can be used to control humidity?

  • Question 3
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    Burning of Mg is extinguished by :

  • Question 4
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    The first ionization potentials ($$eV$$) of $$Be$$ and $$B$$ respectively are:

  • Question 5
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    In the mineral, barium ion can be identified by :

  • Question 6
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    The hydration energy of $$Mg^{2+}$$ is greater than that of :

  • Question 7
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    The alkali metal that reacts with nitrogen directly to form nitride is:

  • Question 8
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    Out of the elements marked A, B, C, D, E, F, G and H
    which form super oxide?  

  • Question 9
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    The product obtained on fusion of $$BaS{ O }_{ 4 }$$ and $${ Na }_{ 2 }C{ O }_{ 3 }$$ is:

  • Question 10
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    Which of the following is not a alkali metal?

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