Q1 What is ‘tincture of iodine’?
Q2 Define solubility. How does solubility of a solid in water change with temperature?
Q3 How can you change a saturated solution to an unsaturated solution without adding any more solvent to it?
Q4 Distinguish between physical change and chemical change.
Q5 Distinguish between metals and non-metals, on the basis of their physical properties.
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Answer:
5. metals; conductors
eg; cu
non metels; insulators
eg ; glass
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