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प्रश्न
The reddish brown deposit formed on iron nails kept in a solution of copper sulphate is
- Cu2O
- Cu
- CuO
- CuS
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उत्तर
(b) Cu.
When iron nails are kept in a copper sulphate solution, the more reactive element iron displaces the less reactive element copper from copper sulphate and forms ferrous sulphate.
Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)
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संबंधित प्रश्न
CuSO4(aq) + Zn(s) → ZnSO4(aq) + Cu(s) is an example of a decomposition reaction.
\[\ce{Fe2O3 + 2Al -> Al2O3 + 2Fe}\]
The above reaction is an example of a ______.
Write the balanced chemical equation for the following and identify the type of reaction.
\[\ce{Magnesium(s) + Hydrochloric acid(aq) -> Magnesium chloride(aq) + Hydrogen(g)}\]
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A + BC → AC + B
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A2O3 + 2B → B2O3 + 2A
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2Na + 2H2O → 2NaOH + H2
What type of reaction is represented by the following equation?
Mg + CuSO4 → MgSO4 + Cu
What is meant by displacement reaction, Explain with help of one example.
What happens when a piece of iron metal is placed in copper sulphate solution? Name the type of reaction involved.
What happens when a zinc strip is dipped into a copper sulphate solution?
Name the type of reaction involved.
A strip of metal X is dipped in a blue coloured salt solution YSO4. After some time, a layer of metal Y from the salt solution is formed on the surface of metal strip X. Metal X is used in galvanisation whereas metal Y is used in making electric wires. Metal X and metal Y together form an alloy Z.
(a) What could metal X be?
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(e) Write the chemical equation of the reaction which takes place on heating XO with Y2.
(f) What type of chemical reaction is illustrated in the above equation?
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(d) Name the salt X(NO3)2.
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\[\ce{AgNO3_{(aq)} + NaCl_{(aq)}-> AgCl_{(s)} + NaNO3}\]
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Explain the terms with examples.
Displacement reaction
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`CuSO_4 (aq) + Fe (s) → FeSO_4(aq) + Cu (s)`
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b) Write the definition of above reaction.
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Zinc reacts with silver nitrate to produce zinc nitrate and silver.
Classify the following reaction into different type:
AgNO3(aq) + NaCl(aq) →AgCl(s) + NaNO3(aq)
Classify the following reaction into different type:
Zn + CuSO4 → ZnSO4 + Cu
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- Direct combination
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- Displacement
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The reaction is – Zinc reacts with copper [II] sulphate to give zinc sulphate and copper.
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The displaced product of the displacement reaction of sodium with cold water.
- Complete the given chemical reaction:
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(i) Zn
(ii) Ag
(iii) Cu
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Choose the best pair.
Match the following
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| REACTION | TYPE |
| NH4OH(aq) + CH3COOH(aq) → CH3COONH4(aq) + H2O(l) | Single Displacement |
| Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s) | Combustion |
| \[\ce{ZnCO3_{(s)} + ->[Heat]ZnO_{(s)} + CO2_{(g)}}\] | Neutralization |
| C2H4(g) + 4O2(g) → 2CO2(g) + 2H2 O(g) + Heat | Thermal decomposition |
\[\ce{Pb + CuCl2 -> PbCl2 + Cu}\]
The above reaction is an example of:
Identify the type of chemical reaction given below:
\[\ce{CuSO4 + Fe -> FeSO4 + Cu}\]
Complete the following chemical reaction:
\[\ce{CuSO4 (aq) + Pb (s) -> \underline{}\underline{}\underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}\underline{}\underline{}}\]
Name the chemical reaction type.
Complete the given chemical equation:
\[\ce{Zn(s) + CuSO4(aq) -> \underline{}\underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}\underline{}}\]
Name the type of reaction.
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