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प्रश्न
Name a metal found in the earth’s crust in free state and state where each of these metals is placed in the reactivity series of metals.
लघु उत्तरीय
उत्तर
Gold (Au) is a metal found in the free state in the Earth's crust because it is least reactive. It is placed at the bottom of the reactivity series as it does not react easily with air or water.
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