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Iron II Oxide

Which of the ...

Question

Which of the following cannot displace $H_{2}$ from dil. Acid?

A

Pt

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B

Zn

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C

Mg

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D

Pb

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Solution

The correct option is A
Pt

Platinum is less reactive that hydrogen so it cannot displace it. It lies below hydrogen in the activity series.

Zinc, magnesium and lead all lie above hydrogen and are more reactive than it. They can displace hydrogen gas easily from a dilute acid.

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