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Question
Increase in temperature for an ionic solid may ........... its co-ordination number:
Increase in temperature for an ionic solid may ........... its co-ordination number:
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Solution
The correct option is A decrease
Pressure and temperature influences 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 co-ordination number. Furthurmore, CsCl structure changes to NaCl structure at 760 K. Thus, high temperature decreases co-ordination number.
Pressure and temperature influences 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 co-ordination number. Furthurmore, CsCl structure changes to NaCl structure at 760 K. Thus, high temperature decreases co-ordination number.
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