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Question
Assertion :6:6 co-ordination at normal temperature and pressure changes to 8:8 co-ordination at high pressure. Reason: Pressure influences the structure of solids.
Assertion :6:6 co-ordination at normal temperature and pressure changes to 8:8 co-ordination at high pressure. Reason: Pressure influences the structure of solids.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Pressure and temperature also influence the structure of ionic solids. The structures of chlorides, bromides and iodides of sodium, potassium and rubidium having 6:6 co-ordination at normal temperature and pressure changes to 8:8 co-ordination like CsCl structure at high pressure.
Thus, high pressure increases the co-ordination number. Furthermore, CsCl structure changes to NaCl structure at 760 K. Thus, high temperature decreases the co-ordination number.
Thus, Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Hence, the correct option is A
Pressure and temperature also influence the structure of ionic solids. The structures of chlorides, bromides and iodides of sodium, potassium and rubidium having 6:6 co-ordination at normal temperature and pressure changes to 8:8 co-ordination like CsCl structure at high pressure.
Thus, high pressure increases the co-ordination number. Furthermore, CsCl structure changes to NaCl structure at 760 K. Thus, high temperature decreases the co-ordination number.
Thus, Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Hence, the correct option is A
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