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प्रश्न
Explain the following in terms of gain or loss of oxygen with one example:
Reduction
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उत्तर
The loss of oxygen from a substance is also called reduction.
When copper(II) oxide is heated with hydrogen gas, it loses its oxygen to form copper metal and water.
\[\ce{CuO + H2 ->[Heat] Cu + H2O}\]
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संबंधित प्रश्न
Identify in the following reaction (a) the substance oxidised, and (b) the substance reduced:
\[\ce{ZnO + C -> Zn + CO}\]
In the reaction represented by the equation:
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
- name the substance oxidised.
- name the oxidising agent.
- name the substance reduced.
- name the reducing agent.
Define the following in terms of gain or loss of hydrogen with one example:
Oxidation
Define reduction.
Identify the substances that are oxidised and the substances that are reduced in the following reaction.
\[\ce{CuO_{(s)} + H2_{(g)} -> Cu_{(s)} + H2O_{(l)}}\]
The electron releasing tendency of zinc is ______ than that of copper.
Compare hydrogen with alkali metals on the basis of:
Oxide formation
Divide the following reactions into oxidation and reduction half-reaction:
Zn + Pb2+→ Pb + Zn 2+
Reacting with water, an active metal produces
Which of the following statements about hydrogen is incorrect?
Name:
an oxidizing agent that does not contain oxygen.
Complete and balance the following equation:
Fe + H2O →___________+____________
Explain the term redox reaction with an example involving the reaction of hydrogen sulphide with chlorine.
Write a short note on oxidizing and reducing agents.
Mention some oxidation reactions that occur in daily life.
Oxidizing agents are otherwise called ______.
The sum of the oxidation number of all atoms in a compound is ______.
Find the oxidation number of the element in the following compound.
Mg in MgO
Identify the type of chemical reaction given below:
\[\ce{2Mg + O2 -> 2MgO}\]
The oxidizing agent in the equation \[\ce{S + 2H2SO4 -> 3SO2 + 2H2O}\] is ______.
