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Q86 (NDA-II/2010) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Basic chemical principles Answer Verified

An oxidising agent is a substance which

Result
Your answer: —  Â·  Correct: A
Explanation

An oxidising agent (or oxidant) is a substance that causes the oxidation of another species by accepting electrons from it [t2, t9]. In a redox reaction, oxidation is defined as the loss of electrons, which results in an increase in the oxidation number of the element being oxidised [t1, t4, t5]. Therefore, the oxidising agent facilitates this process, effectively increasing the oxidation number of an element in the given substance [t1]. Conversely, the oxidising agent itself gains electrons and undergoes reduction, meaning its own oxidation number decreases [t2, t3]. While classical definitions describe oxidising agents as substances that add oxygen or remove hydrogen [c3], the modern electronic definition focuses on electron transfer and the subsequent increase in the oxidation state of the target substance [t1, t6].

Sources

  1. [1] Science , class X (NCERT 2025 ed.) > Chapter 4: Carbon and its Compounds > Formation of coal and petroleum > p. 71
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SIMILAR QUESTIONS

NDA-I · 2012 · Q19 Relevance score: 5.29

Which of the following statements regarding oxidation and reduction are correct? 1. In oxidation, loss of electron takes place whereas in reduction, gain of electron takes place. 2. In oxidation, gain of electron takes place whereas in reduction, loss of electron takes place. 3. Oxidizing agent decreases the oxidation number but reducing agent increases the oxidation number. 4. Oxidizing agent increases the oxidation number but reducing agent reduces the oxidation number. Select the correct answer using the code given below ; Code:

NDA-II · 2011 · Q70 Relevance score: 1.39

In oxidation 1. Hydrogen is displaced from a substance. 2. an electropositive clement is added to or proportion of electropositive element increases in a substance. Select the correct answer using the code given below :

NDA-II · 2014 · Q19 Relevance score: -0.09

What is the oxidizing agent in the following equation? HAs02(aq) + Sn2+ (aq) + H+ (aq) As (s) + Sn4+ (aq) + H20 (I)

NDA-I · 2012 · Q40 Relevance score: -0.29

The following equation is an example of a redox reaction, in which Cl2 is the oxidizing agent and FeBr3 is the reducing agent : 2FeBr3 (aq) + 3Cl2 (g) = 2FeCl 3 (aq) + 3Br2 (l) Which one among the following statements is incorrect for this redox reaction?