Chemistry
Which of the following metals does not give hydrogen with acids?
- Iron
- Copper
- Magnesium
- Zinc
Hydrogen
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Answer
Copper
Reason — Hydrogen cannot be prepared from metals that are below in the metal reactivity series such as copper, since only metals that are more reactive than hydrogen can displace it from acids.
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Related Questions
For the reaction PbO + H2 ⟶ Pb + H2O, which of the following statements is wrong?
- H2 is the reducing agent.
- PbO is the oxidizing agent.
- PbO is oxidized to Pb
- H2 is oxidized to H2O.
Which metal gives hydrogen with all of the following: water, acids, alkalis?
- Fe
- Zn
- Mg
- Pb
Which of the following statements about the reaction given below are correct?
3Fe (s) + 4H2O (g) ⟶ Fe3O4 (s) + 4H2 (g)
P — Iron is getting oxidised.
Q — Water is getting reduced.
R — Water is a reducing agent.
S — Water is an oxidising agent.
- P, Q and R
- R and S
- P, Q and S
- Q and S
Which of the following statements about the reaction given below are incorrect?
ZnO (s) + C (s) ⟶ Zn (s) + CO
P — Zinc is getting reduced.
Q — Carbon is getting oxidised.
R — Carbon monoxide is getting oxidised.
S — Zinc oxide is getting reduced.
- P and Q
- P and R
- P, Q and R
- All are incorrect