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प्रश्न
A strip of copper is placed in four different colourless salt solutions. They are KNO3, AgNO3, Zn(NO3)2 and Ca(NO3)2. Which one of the solutions will finally turn blue?
एका वाक्यात उत्तर
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उत्तर
AgNO3 solution will turn blue.
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Electrolytes
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