Which of the following reactions is the metal displacement reaction? Choose the right option. [2021]

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Q.
Which of the following reactions is the metal displacement reaction Choose the right option. [2021]

1 $2 Pb {({NO}_{3})}_{2} ⟶ 2 PbO + 4 {NO}_{2} + O_{2} ↑$

2 $2 {KClO}_{3} \overset{Δ}{\to} 2 KCl + 3 O_{2}$

3 ${Cr}_{2} O_{3} + 2 Al \overset{Δ}{\to} {Al}_{2} O_{3} + 2 Cr$

4 $Fe + 2 HCl ⟶ {FeCl}_{2} + H_{2} ↑$

Ans.
(3)

In metal displacement reaction more reactive metal displaces the less reactive metal.

${Cr}_{2} O_{3} + 2 Al \overset{Δ}{\to} {Al}_{2} O_{3} + 2 Cr$

Solution

Q.
Which of the following reactions is the metal displacement reaction Choose the right option. [2021]

1 $2 Pb {({NO}_{3})}_{2} ⟶ 2 PbO + 4 {NO}_{2} + O_{2} ↑$

2 $2 {KClO}_{3} \overset{Δ}{\to} 2 KCl + 3 O_{2}$

3 ${Cr}_{2} O_{3} + 2 Al \overset{Δ}{\to} {Al}_{2} O_{3} + 2 Cr$

4 $Fe + 2 HCl ⟶ {FeCl}_{2} + H_{2} ↑$

Ans.
(3)

In metal displacement reaction more reactive metal displaces the less reactive metal.

${Cr}_{2} O_{3} + 2 Al \overset{Δ}{\to} {Al}_{2} O_{3} + 2 Cr$

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Solution

Q. Which of the following reactions is the metal displacement reaction Choose the right option. [2021]

1 2Pb(NO3)2⟶2PbO+4NO2+O2↑

2 2KClO3→Δ2KCl+3O2

3 Cr2O3+2Al→ΔAl2O3+2Cr

4 Fe+2HCl⟶FeCl2+H2↑

Ans. (3) In metal displacement reaction more reactive metal displaces the less reactive metal. Cr2O3+2Al→ΔAl2O3+2Cr

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Q.
Which of the following reactions is the metal displacement reaction Choose the right option. [2021]

1 $2 Pb {({NO}_{3})}_{2} ⟶ 2 PbO + 4 {NO}_{2} + O_{2} ↑$

2 $2 {KClO}_{3} \overset{Δ}{\to} 2 KCl + 3 O_{2}$

3 ${Cr}_{2} O_{3} + 2 Al \overset{Δ}{\to} {Al}_{2} O_{3} + 2 Cr$

4 $Fe + 2 HCl ⟶ {FeCl}_{2} + H_{2} ↑$

Ans.
(3)

In metal displacement reaction more reactive metal displaces the less reactive metal.

${Cr}_{2} O_{3} + 2 Al \overset{Δ}{\to} {Al}_{2} O_{3} + 2 Cr$