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प्रश्न
Explain the following in terms of gain or loss of oxygen with one example:
Oxidation
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उत्तर
Oxidation is a chemical process characterised by the gain of oxygen.
When magnesium metal is heated, it reacts with oxygen in the air to form magnesium oxide. In this reaction, magnesium (Mg) gains oxygen to become magnesium oxide (MgO).
\[\ce{2Mg + O2 -> 2MgO}\]
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संबंधित प्रश्न
Define corrosion.
When SO2 gas is passed through saturated solution of H2S, the following reaction occurs:
SO2 + 2H2S → 2H2O + 3S
In this reaction, which substance is oxidised and which one is reduced?
The addition of hydrogen to a substance is called ______ whereas removal of hydrogen is called ______.
Give one example of an oxidation-reduction reaction which is also a combination reaction.
Indicate which of the following statement is true and which is false:
The removal of hydrogen from a substance is called reduction.
TRUE \ FALSE
Hydrogen is a good oxidizing agent.
Identify the substances that are oxidised and the substances that are reduced in the following reaction.
\[\ce{CuO_{(s)} + H2_{(g)} -> Cu_{(s)} + H2O_{(l)}}\]
In what respect does hydrogen differ from:
alkali metals
Give the general group study of hydrogen with reference to
reducing power
Name:
a solid that is an oxidizing agent.
Complete and balance the following equation:
H2 + S → ___________
With reference to oxidation & reduction reaction – complete the statement given by filling in the blanks with only the words (a) Addition (b) Removal.
‘Oxidation is a chemical reaction involving ____ of oxygen to a substance or ____ of hydrogen from a substance. Reduction on the otherhand involves ____ of hydrogen to a substance or ____ of oxygen from a substance.
State what is oxidising agent. Give an example of oxidising agent in the gaseous, liquid, and solid form.
Identify the reducing agent in the following reactions
`4"NH"_3 + 5"O"_2 -> 4"NO" + 6"H"_2"O"`
The tendency of atoms to have eight electrons in the outer shell is known as ______.
The tarnishing of metals is an example of ______ reaction.
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
The metallic oxide which can be reduced by using common reducing agents is ______.
