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प्रश्न
Fill in the following blanks with suitable words:
The addition of hydrogen to a substance is called ........ whereas removal of hydrogen is called .......
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उत्तर
The addition of hydrogen to a substance is called reduction, whereas removal of hydrogen is called oxidation.
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संबंधित प्रश्न
Corrosion can be prevented by using ……………. solution.
Define ‘redox reaction’. Give one example.
In order to prevent the spoilage of potato chips, they are packed in plastic bags in an atmosphere of:
(a) Cl2
(b) H2
(c) N2
(d) O2
Identify from the reaction the reactants that undergo oxidation and reduction.
2Mg + O2 → 2MgO
In what respect does hydrogen differ from:
alkali metals
Give the general group study of hydrogen with reference to
burning
Write the equation in the ionic form
CuSO4(aq) + Fe(s)→ FeSO4(aq) + Cu(s)
Choose terms from the options given in brackets to complete this sentence.
When CuO reacts with hydrogen,………………… is reduced and ……………….is oxidized to ………………….
(CuO, H2, Cu, H2O)
Complete and balance the following equation:
Zn +_________________→ZnCl2 + H2
State a reason why, when hydrogen is passed over heated copper oxide, the resultant product formed, differs in colour from the original reactant.
Explain the term oxidation in term of addition and removal of oxygen/hydrogen with a suitable example.
Give two tests for a reducing agent.
Identify the reducing agent in the following reactions -
`"H"_2"O" + "F"_2 -> "HF" + "HOF"`
Identify the reducing agent in the following reactions
`"Fe"_2"O"_3 + 3"CO" -> 2"Fe" + 3"CO"_2`
Identify the oxidising agent (oxidant) in the following reactions
`3"Fe" + 4"H"_2"O" -> "Fe"_3"O"_4 + 4"H"_2`
Identify the following reactions as oxidation/reduction/redox reaction
2Mg +O2 → 2MgO
What are redox reactions? Give examples.
Find the oxidation number of the element in the following compound.
Mg in MgO
In the redox reaction:
MnO2 + 4HCl → MnCl2 + 2H2O + Cl2
The metallic oxide which can be reduced by using common reducing agents is ______.
