Which one of the following reaction involves oxidation-
reduction?
(a) H₂ + Br₂ → 2HBr
(b) NaBr + HCl → NaCl + HBr
(c) HBr + AgNO₃ → AgBr + HNO₃
(d) 2NaOH+ H₂SO₄ → Na₂SO₄ + 2H₂O
Answers
reaction D
hope it will help you
HBr + AgNO₃ → AgBr + HNO₃ is the reaction involves oxidation-
reduction.
Explanation:
Redox reaction
It is defined as simultaneously the reduction and oxidation reactions takes place.
Oxidation
It is the chemical reaction, which loss electrons. The oxidation number will raise during this reaction.
Reduction
It is the chemical reaction which gains electrons. The oxidation number will decrease during this reaction.
In first reaction is the redox reaction.
H₂ + Br₂ → 2HBr
In second reaction exchange of ion occurs. This is a double displacement reaction.
NaBr + HCl → NaCl + HBr
In third reaction also double displacement reaction, where exchange of ions occurs.
HBr + AgNO₃ → AgBr + HNO₃
In fourth reaction acid react to base to form water and salt, which is a kind of neutralization reaction.
2NaOH+ H₂SO₄ → Na₂SO₄ + 2H₂O
To learn more;
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