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Q: Which metal is placed at the top of the reactivity series? कौन-सी धातु प्रतिक्रियाशीलता शृंखला (reactivity series) में सबसे ऊपर है?
  • A. Copper/तांबा
  • B. Iron/लोहा
  • C. Silver/चांदी
  • D. Potassium/पोटैशियम
Correct Answer: Option D -
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Explanations:

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