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प्रश्न
What is observed after about 1 hour of adding the strips of copper and aluminium separately to the ferrous sulphate solution filled in two beakers? Name the reaction if any change in colour is noticed. Also, write a chemical equation for the reaction.
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उत्तर
\[\ce{Cu(s) + FeSO4(aq) -> No change will take place}\]
Copper is less reactive than Fe, so Cu cannot displace iron from a ferrous sulphate solution.
No reaction will take place.
\[\ce{2Al(s) + 3FeSO4(aq) -> Al2(SO4)3 + 3Fe(s)}\] (Displacement reaction)
When Al is added to a FeSO4(aq) solution, the green colour of FeSO4(aq) disappears and the Fe is seen setting down as the reaction occurs Al being higher in the reacting series displaces the Fe in FeSO4.
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संबंधित प्रश्न
Reaction of iron nails with copper sulphate solution is an example of
(a) Combination reaction
(b) Decomposition reaction
(c) Displacement reaction
(d) Double displacement reaction
\[\ce{Fe2O3 + 2Al -> Al2O3 + 2Fe}\]
The above reaction is an example of a ______.
In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the reaction involved.
Why does the colour of copper sulphate solution change when an iron nail is kept immersed in it?
When a black metal compound XO is heated with a colourless gas Y2, then metal X and another compound Y2O are formed. Metal X is red-brown in colour which does not react with dilute acids at all. Gas Y2 can be prepared by the action of a dilute acid on any active metal. The compound Y2O is a liquid at room temperature which can turn anhydrous copper sulphate blue.
- What do you think is metal X?
- What could be gas Y2?
- What is compound XO?
- What is compound Y2O?
- Write the chemical equation of the reaction which takes place on heating XO with Y2.
- What type of chemical reaction is illustrated in the above equation?
To show that zinc is a more active metal than copper, the correct procedure is to:
(1) add dilute nitric acid on strips of both the metals.
(2) observe transmission of heat through strips of zinc and copper.
(3) prepare solution of zinc sulphate and hang strip of copper into it.
(4) prepare solution of copper sulphate and hang strip of zinc into it.
Explain the terms with examples.
Displacement reaction
Classify the following reaction into –
- Direct combination
- Decomposition
- Displacement
- Double decomposition
The reaction is – Zinc reacts with copper [II] sulphate to give zinc sulphate and copper.
Which of the following is a displacement reaction?
State the change in colour observed in following case mentioning the reason:
A piece of zinc is dipped in ferrous sulphate solution.
