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there was alot of dust on the olw jewellery and when it got polished it ' loosed weight'
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this is the answer for question no 6
Gold and platinum are even known as noble metals. They are not affected by air, water and even by chemicals. Since they have bright lustre, jewellery can be made from them. ... Due to the presence of this layer, the metal becomes un reactive and can be used in making cooking utensils.
Gold and platinum are even known as noble metals. They are not affected by air, water and even by chemicals. Since they have bright lustre, jewellery can be made from them. ... Due to the presence of this layer, the metal becomes un reactive and can be used in making cooking utensils.
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