4Q16Q17Q18Some materials are naturally lustrous while others are coated with compounds to make them appear lustrous. Over time, all materials tend to lose lustre due to their environment. Which of the following objects cannot regain their lustre upon being rubbed with sandpaper?
i.Rusted nails
ii.Old silver cutlery
iii.Oldceramic mug
iv.Copper jug
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Answer:
The answer is iv. copper jug
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The answer is Copper Jug
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