nbsp-Which among the following is a displacement reaction-a- H2SO4 - Mg - H2 - MgSO4-b- CaCO3 - CaO - CO2-c- 2H2 - O2 - 2H2O-d- CuSO4-5H2O - CuSO4 - 5H2O

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Physical Changes and Its Characteristics

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Question

Which among the following is a displacement reaction?
(a) H₂SO₄ + Mg ⟶ H₂ + MgSO₄
(b) CaCO₃ ⟶ CaO + CO₂
(c) 2H₂ + O₂ ⟶ 2H₂O
(d) CuSO₄.5H₂O ⟶ CuSO₄ + 5H₂O

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Classify each of the following reactions as combination, decomposition, displacement or double displacement reaction. [5 MARKS]

1.	Column-A Types of chemical reaction		Column-B Chemical equation
(A)	Combination reaction	(i)	$Z n + H_{2} S O_{4} \to Z n S O_{4} + H_{2}$
(B)	Oxidation & reduction reaction	(ii)	$2 H_{2} O E l e c t r i c i t y ⟶ 2 H_{2} + O_{2}$
(C)	Decomposition reaction	(iii)	$C a O + C O_{2} \to C a C O_{3}$
(D)	Displacement reaction	(iv)	$H_{2} + C l_{2} \to 2 H C l$
(E)	Double Displacement reaction	(v)	$B a C l_{2} + N a_{2} S O_{4} \to B a S O_{4} ↓ + N a C l$

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