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The p-Block Elements

Short Answer Type

571. Assign reason for each of the following:
Noble gases are mostly chemically inert.

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572. Assign reason for the following:
Bismuth is a strong oxidizing agent in a pentavalent state.

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573. NO is paramagnetic in the gaseous state but diamagnetic in the solid and liquid states. Justify?

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574. (CH₃)₃ N is basic but (CF₃)₃ N is not basic. Explain.

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575. Why the melting and boiling points of halogens increases in going from top to the bottom of the group?

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576. Give appropriate reason for the following observation:
Only higher members of Group 18 of the periodic table are expected to form compounds.

Higher member of group 18 are bigger in size thus members of Group 18 have low Ionisation energy, therefore excitation of electron can be done by supplying energy.

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577. Give appropriate reason for the following observation:
Fluorine is a stronger oxidising agent than chlorine, though fluorine has lower electron affinity than chlorine.

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578. Give appropriate reason for the following observation:
NO₂ readily forms a dimer, whereas ClO₂ does not.

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579.

Account for the following:
Chlorine water has both oxidizing and bleaching properties.

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580.

Account for the following:
H₃PO₂ and H₃PO₃ acts as good reducing agents while H₃PO₄ does not.

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Previous Year Papers

Test Series

Test Yourself

Short Answer Type

576. Give appropriate reason for the following observation:Only higher members of Group 18 of the periodic table are expected to form compounds.

576. Give appropriate reason for the following observation:
Only higher members of Group 18 of the periodic table are expected to form compounds.