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प्रश्न
State, giving reason, whether the substances printed in bold letters have been oxidized or reduced.
Mg + 2HCl → MgCl2 + H2
उत्तर
Magnesium undergoes oxidation by loss of electrons (Mg - 2e- → Mg2+).
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संबंधित प्रश्न
Explain the following in term Oxidation of gain or loss of oxygen with two example.
In the reaction represented by the equation:
MnO2 + 4HCl → MnCl2 + 2H2O + Cl2
(i) name the substance oxidised.
(ii) name the oxidising agent.
(iii) name the substance reduced.
(iv) name the reducing agent.
When a magnesium ribbon is heated, it burns in air to form magnesium oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.
Hydrogen burns with a ______ flame and ______ sound is heard.
Which of the following statements about hydrogen is incorrect?
Name:
a substance that oxidizes concentrated HCl to chlorine.
Complete and balance the following equation:
Fe + H2O →___________+____________
Write chemical formula for rust.
Mention some oxidation reactions that occur in daily life.
A reddish brown metal used in electrical wires when powdered and heated strongly turns black. When hydrogen gas is passed over this black substance, it regains its original colour. Based on this information answer the following questions:
- Name the metal and the black substance formed.
- Write balanced chemical equations for the two reactions involved in the above information
