Which of the following is an example of double displacement reaction-i CO2g - H2g - COg - H2O gii P4O10s - 6H2Ol - 4H3PO4aqiii H2-O2- H2O-iv CoCl2aq - Na2CO3aq - CoCO3aq - 2NaClaq-

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Double Displacement Reaction

Which of the ...

Question

Which of the following is an example of double displacement reaction?
(i) $C O_{2} (g) + H_{2} (g) \to C O (g) + H_{2} O (g)$
(ii) $P_{4} O_{10} (s) + 6 H_{2} O (l) \to 4 H_{3} P O_{4} (a q)$
(iii) $H_{2} + O_{2} \to H_{2} O$
(iv) $C o C l_{2} (a q) + N a_{2} C O_{3} (a q) \to C o C O_{3} (a q) + 2 N a C l (a q)$

(i)

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(ii)

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(iii)

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(iv)

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Solution

The correct option is D
(iv)

In a double displacement reaction, the positive ions (cations) and the negative ions (anions) of the two reactants switch places, forming two new compounds or products.
In the equation,
$C o C l_{2} (a q) + N a_{2} C O_{3} (a q) \to C o C O_{3} (a q) + 2 N a C l (a q)$
the anions $C l^{-} & C O_{3}^{2 -}$ swap their places and form $C o C O_{3} & 2 N a C l$ ,
hence it is an example of double displacement reaction.

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Similar questions

Q. Which of the following is an example of double displacement reaction?
(i)

C O_{2} (g) + H_{2} (g) \to C O (g) + H_{2} O (g)

(ii)

P_{4} O_{10} (s) + 6 H_{2} O (l) \to 4 H_{3} P O_{4} (a q)

(iii)

H_{2} + O_{2} \to H_{2} O

(iv)

C o C l_{2} (a q) + N a_{2} C O_{3} (a q) \to C o C O_{3} (a q) + 2 N a C l (a q)

{CO}_{2} (g) + H_{2} (g) \to CO(g) + H_{2} O(l)

The given reaction is an example of:

Which of the following graphs are correct for the given reactions; $H_{2} (g) + C O_{2} (g) ⇌ H_{2} O (g) + C O (g)$ Assume initially only $H_{2}$ and $C O_{2}$ are present :

{CO}_{2} (g) + H_{2} (g) \to CO(g) + H_{2} O(l)

The given reaction is an example of:

Q. Consider the reactions:

(i)

C O (g) + H_{2} O (g) ⇌ {C O}_{2} (g) + H_{2} (g); K_{1}

(ii)

{C H}_{4} (g) + H_{2} O (g) ⇌ C O (g) + 3 H_{2} (g); K_{2}

(iii)

{C H}_{4} (g) + 2 H_{2} O (g) ⇌ {C O}_{2} (g) + {4 H}_{2} (g); K_{3}

Which of the following is correct?

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Which of the following is an example of double displacement reaction? (i) CO2(g)+H2(g)→CO(g)+H2O(g) (ii) P4O10(s)+6H2O(l)→4H3PO4(aq) (iii) H2+O2→H2O​​​​​​​ (iv) CoCl2(aq)+Na2CO3(aq)→CoCO3(aq)+2NaCl(aq)​​​​​​​