Advertisements
Advertisements
Question
Complete and balance the following equation:
\[\ce{Fe_{(s)} + H2O_{(g)} ->[Red heat]}\]
Advertisements
Solution
\[\ce{3Fe_{(s)} + 4H2O_{(g)} ->[Red heat] Fe3O4_{(s)} + 4H2_{(g)}}\]
APPEARS IN
RELATED QUESTIONS
‘E’ is an element which reacts with oxygen to form an oxide E2O. An aqueous solution of E2O turns red litmus blue, so:
i. What is the nature of oxide E2O ?
ii. Write the name of element ‘E’.
Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows.
| Metal | Iron (II) sulphate | Cooper (II) sulphate | Zinc sulphate | Silver nitrate |
| A | No reaction | Displacement | ||
| B | Displacement | No reaction | ||
| C | No reaction | No reaction | No reaction | Displacement |
| D | No reaction | No reaction | No reaction | No reaction |
Use the Table above to answer the following questions about metals A, B, C and D.
- Which is the most reactive metal?
- What would you observe if B is added to a solution of copper (II) sulphate?
- Arrange the metals A, B, C and D in the order of decreasing reactivity.
Write the chemical reaction when iron reacts with dilute H2SO4.
Show the formation of Na2O by the transfer of electrons.
What name is given to those metal oxides which show basic as well as acidic behaviour?
Name the metal which has been placed at the top of the reactivity series.
What will happen if a strip of zinc is immersed in a solution of copper sulphate?
Give reasons for the following:
Blue colour of copper sulphate solution is destroyed when iron filings are added to it.
Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.
How do non-metals react with hydrogen? Explain with an example.
Name another metal oxide which behaves like aluminium oxide.
A basic oxide will be formed by the element ______.
Out of aluminium, copper, calcium and tin, the most reactive metal is:
The elements whose oxides can turn litmus solution blue are ______.
A metal less reactive and another metal more reactive than hydrogen are ______.
Which one of the following four metals would be displaced from the solution of its salt by the other three metals?
Which of the following reactions will not occur? Why not?
- \[\ce{MgSO4_{(aq)} + Cu_{(s)} -> CuSO4_{(aq)} + Mg_{(s)}}\]
- \[\ce{CuSO4_{(aq)} + Fe_{(s)} -> FeSO4_{(aq)} + Cu_{(s)}}\]
- \[\ce{MgSO4_{(aq)} + Fe_{(s)} -> FeSO4_{(aq)} + Mg_{(s)}}\]
Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines.
Choose the correct alternative and rewrite the following:
Reaction of iron nails whith copper sulphate solution is an example of _____________________
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
