Which among the following isare double displacement reactions-i Pb-CuCl2- PbCl2- Cuii Na2SO4 - BaCl2- BaSO4 - 2NaCliii C - O2- CO2iv CH4 - 2O2- CO2 - 2H2O

The correct option is B (ii) onlyDouble displacement reactions are those in which ions of the #160;reactants are exchanged to form new compounds as products. ...

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Standard VIII

Chemistry

Double Displacement Reaction

Which among t...

Question

Which among the following is(are) double displacement reaction(s)?
(i) $P b + C u C l_{2} \to P b C l_{2} + C u$
(ii) $N a_{2} S O_{4} + B a C l_{2} \to B a S O_{4} + 2 N a C l$
(iii) $C + O_{2} \to C O_{2}$
(iv) $C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$

(i) and (iv)

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(ii) only

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(i) and (ii)

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(iii) and (iv)

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Solution

The correct option is B (ii) only
Double displacement reactions are those in which ions of the reactants are exchanged to form new compounds as products.
In option $(i i)$ ,
$N a^{+}$ ion combines with $C l^{-}$ ion and $S O_{4}^{2 -}$ ion combines with $B a^{2 +}$ ion to form two new compounds as sodium chloride ( $N a C l$ ) and barium sulphate ( $B a S O_{4}$ ) respectively.

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Similar questions

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)

Which of the following are examples of combination reactions?

(i) $C a O + O_{2} \to 2 C a C O_{3}$

(ii) $C a C O_{3} \to C a O + C O_{2}$

(iii) $M g O + C O_{2} \to M g C O_{3}$

(iv) $F e + S \to F e S$

(v) $2 A g C l + s u n l i g h t \to 2 A g + C l_{2}$

(vi) $C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$

(vii) $N a_{2} O + H_{2} O \to 2 N a O H$

Q. Match the column I with column II to identify the products of oxidation of alkanes and mark the appropriate choice.

	Column I		Column II
(A)	$C H_{4} + 2 O_{2} K M n O_{4} - ---- \to [O]$	(i)	$H C O O H + H_{2} O$
(B)	$2 C H_{4} + O_{2} C u / 523 K - ----- \to 100 a t m$	(ii)	$C O_{2} + 2 H_{2} O$
(C)	$C H_{4} + O_{2} M o_{2} O_{3} - ----- \to Δ$	(iii)	$2 C H_{3} O H$
(D)	$C H_{4} + \frac{3}{2} O_{2} (C H_{3} C O O)_{2} M n - --------- \to$	(iv)	$H C H O + H_{2} O$