Which of the following is an example of double displacement reaction- i CO 2 g - H 2 g - CO g - H 2 O g ii P 4 O 10 s -6 H 2 O l - 4 H 3 P O 4 aq iii H 2- O 2- H 2 Oiv CoCl 2 aq - N a 2 CO 3 aq - CoCO 3 aq -2 NaCl aq A- ivB- iC- iiD- iii

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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

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:

Q. Question 7

Which among the following is (are) double displacement reaction(s)?

(i)

Pb + {CuCl}_{2} \to {PbCl}_{2} + Cu

(ii)

{Na}_{2} {SO}_{4} + {BaCl}_{2} \to {BaSO}_{4} + 2 NaCl

(iii)

C + O_{2} \to {CO}_{2}

(iv)

{CH}_{4} + 2 O_{2} \to {CO}_{2} + 2 H_{2} O

(a) (i) and (iv)
(b) (ii) only
(c) (i) and (ii)
(d) (iii) and (iv)

{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 :

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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)