Which of the following metals does not give hydrogen with acids ?
A
Iron
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B
Calcium
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C
Platinum
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D
Zinc
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E
None of the above
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Solution
The correct option is A Platinum The most reactive metals will react even with water while the least reactive will not react even with acid. According to reactivity series if we put the metals in order of their reactivity from most reactive to least reactive and platinum is the least reactive with acid and hydrogen is not evolved.