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It was Paheli’s birthday. Her grandmother gave her two gifts made of metals, one old dull silver spoon and a pair of lustrous gold earrings. She was surprised to see the difference in the appearance of the two metals. Can you explain the reason for this difference?
Paheli was surprised to see the difference in the appearance of two metals because silver in and loses its shine. But, gold is one of the which present in the atmosphere.
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