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प्रश्न
Name:
a substance that oxidizes concentrated HCl to chlorine.
उत्तर
MnO2
manganese(IV) oxide
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संबंधित प्रश्न
Define oxidation in terms of gain or loss of hydrogen with one example.
Define reduction.
Why this reaction is considered a reversible reaction?
State, giving reason, whether the substances printed in bold letters have been oxidized or reduced.
Mg + 2HCl → MgCl2 + H2
Complete and balance the following equation:
Zn +_________________→ZnCl2 + H2
During the reaction of some metals with dilute hydrochloric acid, following observations are made.
Silver metal does not show any change
Explain this observation giving suitable reason.
The tarnishing of metals is due to the formation of ______.
Identify the following reactions as oxidation/reduction/redox reaction
2Mg +O2 → 2MgO
What is rancidity?
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.
