1. Lustre:?Non-metals do not have a shiny surface. However, iodine is an exception, which has a very shiny surface. Meaning of hindi

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Solution

Dear student
generally when a minerals surface reflects light we say that it has lustre
Iodine has a very shiny surface because Iodine have free electrons. When sunlight falls on such surface, free electrons get vibrated and reflect light. Then it shines

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