examples for
1]reactions of dilute acids with metal metal oxides.
2]nuetrilisation reaction

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Solution

1) Metals ( except Cu, Ag, Au) usually displace hydrogen gas from dilute acids.
Metals reacts with dilute acid like HCl to give metal chlorides and hydrogen gas.
For eg. -
2Na + 2HCl $\to$ 2NaCl + H₂
2Al + 6HCl $\to$ 2AlCl₃ + 3H₂
Metals reacts with dilute sulphuric acid to give metal sulphates and hydrogen gas.

Reaction of metal oxides with acids -
CuO + H₂SO₄ $\to$ CuSO₄ + H₂O
ZnO + H₂SO₄ $\to$ ZnSO₄ + H₂O
MgO + 2HNO₃ $\to$ Mg(NO₃)₂ + H₂O

2) Neutralisation reaction - It is reaction in which acid and base reacts to form salt.
For eg. -
NaOH + HCl $\to$ NaCl + H₂O
2NaOH + H₂CO₃ $\to$ Na₂CO₃+ H₂O
2HCl + Ca(OH)₂ $\to$ CaCl₂ + 2H₂O

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End products of metallic reaction with dilute acids

W, X, Y

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W, X, Y

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Reaction	$W$	$X$	$Y$	$Z$
$m e t a l + d i l u t e h y d r o c h l o r i c a c i d$	fizzing	fizzing	violent fizzing	no reaction
$m e t a l o x i d e + c a r b o n + h e a t$	no reaction	metal produced	no reaction	metal produced

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