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Chemistry : The p-Block Elements

Short Answer Type

561. Why do noble gases have comparatively large atomic sizes?

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Long Answer Type

562. List the uses of neon and argon gases.

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Short Answer Type

563. State reasons for each of the following happenings:
(i) Sulphur vapour exhibits some paramagnetism.
(ii) Unlike phosphorus nitrogen shows little tendency for catenation.

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564. Give reasons for the following:
CN^– ion is known but CP^– is not known.

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565. Give reasons for the following:
NO₂ demerises to form N₂O₄

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566. Give reasons for the following:
ICl is more reactive than I-I

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567. SF₆ is a well known compond but SCl₆ is not known. Explain?

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568. Assign an appropriate reason for each of the following statements:
SiF₆²^– is known but SiCl₆²^– is not known.

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569. Assign an appropriate reason for each of the following statements:
More metal fluorides are ionic in nature than metal chlorides.

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570. Assign an appropriate reason for each of the following statements:
Solid phosphorus pentachloride exhibits some ionic character.

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