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Maharashtra State BoardSSC (English Medium) 10th Standard

I) Observe the Following Reaction and Answer the Following Questions. C U S O 4 ( a Q ) + F E ( S ) → F E S O 4 ( a Q ) + C U ( S ) A) Identify and Write the Type of Chemical Reaction - Science and Technology 1

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Question

i) Observe the following reaction and answer the following questions.
`CuSO_4 (aq) + Fe (s) →  FeSO_4(aq) + Cu (s)`
a) Identify and write the type of chemical reaction.
b) Write the definition of above reaction.

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Solution

a) displacement reaction.
b) The reaction in which the place of the ion of a less reactive element in a compound is taken by another more reactive element by formation of its own ions, is called displacement reaction.

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2018-2019 (March) Balbharati Model Question Paper Set 2

RELATED QUESTIONS

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


The reddish brown deposit formed on iron nails kept in a solution of copper sulphate is

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  2. Cu
  3. CuO
  4. CuS

What happens when dilute hydrochloric acid is added to iron fillings? Choose the correct answer.


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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What type of chemical reaction is represented by the following equation?

A + BC → AC + B

 


what type of reaction is the following:

Cl+ 2KI → 2KCl + I2 


What type of reaction is represented by the following equation?

2Na + 2H2O → 2NaOH + H2


What happens when a piece of iron metal is placed in 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.
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When a strip of red-brown metal X is placed in a colourless salt solution YNO3 then metal Y is set free and a blue coloured salt solution X(NO3)2 is formed. The liberated metal Y forms a shining white deposit on the strip of metal X.
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Name the type of reaction which is governed by the position of a metal in the metal activity series ?


The colour of an aqueous solution of zinc sulphate as observed in the laboratory is:

(1) Green 

(2) Yellow 

(3) Blue 

(4) Colourless


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


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Identify the type of reaction taking place in the following case and write the balanced chemical equation for the reaction.
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Classify the following reaction into different type:

Zn + CuSO4 → ZnSO4 + Cu


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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  3. Displacement
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The reaction is – Zinc reacts with copper [II] sulphate to give zinc sulphate and copper.


Give a balanced equation for –

A displacement reaction involving a metal above hydrogen in the activity series with copper [II] sulphate solution


Select the correct answer for the statement given below:

The displaced product of the displacement reaction of sodium with cold water.


  • Complete the given chemical reaction:
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  • Name the type of the reaction.

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(i) Zn

(ii) Ag

(iii) Cu

(iv) Mg.

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

Identify the type of chemical reaction given below:

\[\ce{CuSO4 + Fe -> FeSO4 + Cu}\]


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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  1. \[\ce{Mg + 2HCl -> MgCl_2 +H_2}\]
  2. \[\ce{NaOH +HCl -> NaCl + H_2O}\]

The correct statement about these equations is:


The colour of the solution observed after 30 minutes of placing zinc metal in copper sulphate solution is ______.


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