Please answer it....very urgent...
State whether hydrogen gas is liberated or not in the four reactions listed below-
1. Reaction of zinc with potassium hydroxide
2. Reaction of phosphorus with concentrated sulphuric acid
3. Reaction of iron with hydrochloric acid
4. Reaction of copper with nitric acid
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Hydrogen gas will only be liberated in Fe+HCL》》FeCl2+ H2.
In other cases, H2 will not be given.
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