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Moist chlorine gives oxygen and therefore it can act as on oxidising and bleaching agent: Cl 2 + H 2 O → HCI + HCIO HCIO → HCI + O Chlorine is an oxidising agent as it can take electrons Cl 3 , + 2e– → 3Cl – Owing to liberation of oxygen from water moist chlorine bleaches vegetable colouring matter like litmus, indigo, lien wood pulp, cotton fabric etc. Cl 2 , + H 2 O → 2HCl + [O] Coloured matter + [O] → Colourless matter

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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.

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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.

Moist chlorine gives oxygen and therefore it can act as on oxidising and bleaching agent:
Cl₂ + H₂O → HCI + HCIO
HCIO → HCI + O
Chlorine is an oxidising agent as it can take electrons
Cl₃, + 2e– → 3Cl^–Owing to liberation of oxygen from water moist chlorine bleaches vegetable colouring matter like litmus, indigo, lien wood pulp, cotton fabric etc.
Cl₂, + H₂O → 2HCl + [O]
Coloured matter + [O] → Colourless matter