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# Which of the following metals cannot replace hydrogen from water or steam?

### Question

Which of the following metals cannot replace hydrogen from water or steam?

A) Sodium

B) Magnesium

C) Iron

D) Calcium

### Explanation:

Metals above hydrogen in the activity series can displace or replace hydrogen present in water (H2O) example of such metals are Ca, K, Na etc. But the metals below hydrogen in the activity series cannot replace hydrogen in the activity series example of such metals are Cu Hg.

## Dicussion (1)

• Metals above hydrogen in the activity series can displace or replace hydrogen present in water (H2O) example of such metals are Ca, K, Na etc. But the metals below hydrogen in the activity series cannot replace hydrogen in the activity series example of such metals are Cu Hg.