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प्रश्न
Give reasons for the following:
The reaction of iron (III) oxide [Fe2O3] with heated aluminum is used to join cracked machine parts.
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उत्तर
The reaction of iron (III) oxide with heated aluminum is a displacement reaction which is highly exothermic in nature. The amount of heat evolved is so large that the metals are produced in the molten state due to which this reaction is used to join cracked machine parts.
\[\ce{Fe2O3(s) +2Al(s)->2Fe(l) + Al2 O3(s) + heat}\]
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संबंधित प्रश्न
What type of reaction is represented by the following equation?
\[\ce{2Na + 2H2O -> 2NaOH + H2}\]
What happens when a zinc strip is dipped into a copper sulphate solution?
Name the type of reaction involved.
Explain the following type of chemical reaction, giving two examples for it:
Displacement reaction
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(1) Green
(2) Yellow
(3) Blue
(4) Colourless
Explain the terms with examples.
Displacement reaction
Classify the following reaction into –
- Direct combination
- Decomposition
- Displacement
- Double decomposition
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Give a balanced equation for –
A displacement reaction involving a metal above hydrogen in the activity series with copper [II] sulphate solution
A single displacement reaction is represented by X(s) + 2HCl(aq) → XCl2(aq) + H2(g). Which of the following(s) could be X.
(i) Zn
(ii) Ag
(iii) Cu
(iv) Mg.
Choose the best pair.
\[\ce{Pb + CuCl2 -> PbCl2 + Cu}\]
The above reaction is an example of:
Identify the type of chemical reaction given below:
\[\ce{CuSO4 + Fe -> FeSO4 + Cu}\]
