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The p-Block Ele...

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  • Question 1
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    Which of the following statements is wrong?

  • Question 2
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    A brown ring is formed in the ring test for \(NO_3^–\) ion. It is due to the formation of

  • Question 3
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    Elements of group-15 form compounds in +5 oxidation state. However, bismuth forms only one well characterised compound in +5 oxidation state. The compound is

  • Question 4
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    On heating ammonium dichromate and barium azide separately we get

  • Question 5
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    In the preparation of \(HNO_3\), we get NO gas by catalytic oxidation of ammonia. The moles of NO produced by the oxidation of two moles of \(NH_3\) will be ______.

  • Question 6
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    The oxidation state of central atom in the anion of compound \(NaH_2 PO_2 \) will be ______.

  • Question 7
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    A black compound of manganese reacts with a halogen acid to give greenish yellow gas. When excess of this gas reacts with \(NH_3\) an unstable trihalide is formed. In this process the oxidation state of nitrogen changes from _________.

  • Question 8
    1 / -0

    In the preparation of compounds of Xe, Bartlett had taken \(O_2^+ Pt F_6^– \) as a base compound. This is because

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