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The p-Block Ele...

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  • Question 1
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    The tendency of BF$$_{3}$$, BCl$$_{3}$$ and BBr$$_{3}$$ to behave as Lewis acid decreases in the sequence is:

  • Question 2
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    What is the value of X in the given chemical formula of crystalline borax, $$Na_{2}[B_{4}O_{5}(OH)_{4}].XH_{2}O$$?

  • Question 3
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    Which of the following is the electron deficient molecule?

  • Question 4
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    When borax is dissolved in water :

  • Question 5
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    The structure of silicon(IV) oxide belongs to the type:

  • Question 6
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    The gaseous product(s) expected at room temperature by reaction of sodium borohydride an boron trifluoride under anhydrous conditions is/are :

  • Question 7
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    The possible oxidation state of Tl are:

  • Question 8
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    The repeating structural unit in silicone is:

  • Question 9
    1 / -0

    Formula of Pyro silicic acid:

  • Question 10
    1 / -0

    $$CO_2$$ is gas, while $$SiO_2$$ is solid because :

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