1Thank You
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Q1 A liquid which is supercooled frequently is called ?
Q2 Solublity of iodine in water is increased greatly by addition of iodide ions .Why ?
Q3 AlF3 is ionic whereas AlCl3 is covalent ?
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2 Answers
106Q2. I2+I- --> I3-
This is why iodine becomes soluble in water when iodide ions are added
Q3. AlCl3 exists as a covalent dimer
AlF3 is ionic because the anion is smaller and has more charge density, so it is least polarizable hence ionic
While Cl is comparatively larger, and hence more polarizable than F so AlCl3 is less ionic (it is covalent)