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The p-Block Elements

Short Answer Type

541. Why is dioxygen a gas but sulphur a solid?

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542. What is the covalency of nitrogen in N₂O₅?

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543. Explain why both N and Bi do not form pentahalides while phosphorus does.

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544. What is the covalency of nitrogen in N₂O₅?

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545. Explain why both N and Bi do not form pentahalides while phosphorus does.

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546. Account for the following observations:
among the halogens, F₂, is the strongest oxidising agent?

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547. Account for the following observations:
fluorine exhibits only-1 oxidation state whereas other halogens exhibit positive oxidation states also.

Fluorine is most electronegtive atom and Fluorine atom has 1 unpaired electron and so its oxidation state is –1. Fluorine does not exhibit positive oxidation state because it cannot expand its octet due to non-availability of d-orbitals.

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548. Account for the following observations:
acidity of oxo acid of chlorine is HOCl < HOCIO < HOClO₂ < HOClO₃

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549. How can you prepare Cl₂ from HCI and HCI from Cl₂?

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550. What inspired Neil Bartlett for carrying out reaction between Xe and Pt F₆?

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Previous Year Papers

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Test Yourself

Short Answer Type

547. Account for the following observations:fluorine exhibits only-1 oxidation state whereas other halogens exhibit positive oxidation states also.

547. Account for the following observations:
fluorine exhibits only-1 oxidation state whereas other halogens exhibit positive oxidation states also.