Surekha was very upset as her silver jewellary had turned black, and l – InterviewSolution

InterviewSolution

1.	Surekha was very upset as her silver jewellary had turned black, and lost its lustre. Her father is a science teacher and he washed and cleaned the jewellary using toothpaste and brought the shine back. How had the toothpaste got the shine of silver back ?
Answer» Solution : Toothpaste reacts with black coating of SILVER SULPHIDE and REMOVES it.

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