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The p-Block Ele...

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  • Question 1
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    Aluminium is usually found in $$+3$$ oxidation state. In contrast, thallium exists in $$+1$$ and $$+3$$ oxidation states. This is due to : 

  • Question 2
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    Correct statements among a to d regarding silicones are:


    (a) They are polymers with hydrophobic character.

    (b) They are biocompatible.

    (c) In general, they have high thermal stability and low dielectric strength.

    (d) Usually, they are resistant to oxidation and used as greases.

  • Question 3
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    Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is:

  • Question 4
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    The amorphous form of silica is:

  • Question 5
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    Which one of the following elements is unable to form $$MF_{6}^{3-}$$ ion?

  • Question 6
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    Which of the following is incorrect statement ?

  • Question 7
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    How many electrons can fit in the orbital for which $$n = 3$$ and $$l = 1$$?

  • Question 8
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    The stability of $$+1$$ oxidation state among $$Al$$, $$Ga$$, $$In$$ and $$Tl$$ increases in the sequence:

  • Question 9
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    The element $$Z = 114$$ has been discovered recently. It will belong to which of the following family/ group and electronic configuration?

  • Question 10
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    What is the change in oxidation number of carbon in the following reaction?
    $$CH_4 (g) + 4Cl_2 (g)\longrightarrow CCl_4 (l) + 4HCl(g)$$

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