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प्रश्न
What is an oxidising agent?
उत्तर
An oxidising agent is a compound that supplies oxygen in a reaction and gets reduced.
Examples of oxidising agents are potassium permanganate, potassium dichromate, oxygen and ozone.
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संबंधित प्रश्न
Define corrosion.
Give an example of an oxidation reaction.
Is oxidation an exothermic or an endothermic reaction?
When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.
Explain the following in term of gain or loss of oxygen with two examples.
Oxidation
State, giving reason, whether the substances printed in bold letters have been oxidized or reduced.
PbO + CO → Pb + CO2
You are provided with two containers made up of copper and aluminium. You are also provided with solutions of dilute HCl, dilute HNO3, ZnCl2 and water. In which of the above containers, can these solutions be kept?
The tarnishing of metals is due to the formation of ______.
When hydrogen gas is passed over black copper oxide, a reddish-coloured layer of copper is formed.
Answer the questions that follow based on this reaction.
- Write the equation.
- What type of reaction is it?
- Complete the blanks:
In this reaction, an oxygen atom goes away from CuO (copper oxide), which means that ______ of copper oxide takes place, whereas a hydrogen molecule takes up an oxygen atom and water (H2O) is formed, meaning ______ of hydrogen takes place.
Metals are good ______.
