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प्रश्न
Define reduction.
उत्तर
Those reactions in which hydrogen combines with a substance or oxygen is removed from a substance, are known as reduction reactions.
Example: \[\ce{2HgO->[heat]2Hg +O2}\]
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संबंधित प्रश्न
Define reduction in terms of gain or loss of hydrogen with one example.
You are given the following chemical equation:
Mg (s) + CuO (s) → MgO (s) + Cu (s)
This equation represents:
(a) decomposition reaction as well as displacement reaction
(b) combination reaction as well as double displacement reaction
(c) redox reaction as well as displacement reaction
(d) double displacement reaction as well as redox reaction
Indicate which of the following statement is true and which is false:
The removal of hydrogen from a substance is called reduction.
The colours of aqueous solutions of CuSO4 and FeSO4 as observed in the laboratory are:
(A) pale green and light blue respectively
(B) light blue and dark green respectively
(C) dark blue and dark green respectively
(D) dark blue and pale green respectively
State whether the following conversion is oxidation or reduction:
2Cl- - e-→ Cl2
Complete and balance the following equation:
CuO +__________→ Cu +___________
Which of the following statements about the given reaction are correct?
\[\ce{3Fe_{(s)} + 4H2O_{(g)} -> Fe3O4_{(s)} + 4H2_{(g)}}\]
(i) Iron metal is getting oxidised.
(ii) Water is getting reduced.
(iii) Water is acting as the reducing agent.
(iv) Water is acting as oxidising agent.
Why do we store silver chloride in a dark coloured bottle?
Define oxidation number.
Find the oxidation number of the element in the following compound.
Zn in ZnSO4
