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Define oxidation number. What is the oxidation number of alkaline earth metal elements in their compounds?

Important Questions on Redox Reactions

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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
The oxidation number of sulphur in S8 molecule is
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
The oxidation states of Cr in CrH2O6Cl3, CrC6H62 and K2CrCN2O2O2NH3 , respectively, are:
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
In acidic medium, H2O2 changes Cr2O7-2 to CrO5 which has two -O-O- bonds Oxidation state of Cr in CrO5 is:
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
CH4(g)+4Cl2(g)→CCl4(1)+4HCl(g) In the above reaction, the change of oxidation state of carbon is
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
The oxidation number of sulphur is +4 in
MEDIUM
Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
In the reaction of gold with aquaregia, oxidation state of Nitrogen changes from
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
The correct structure of tribromooctaoxide is:
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number

The oxidation number of the underlined atom in the following species is given. Identify the incorrect statement.

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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
The pair of compounds having metals in their highest oxidation state is
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
Two elements, X and Y have atomic numbers 33 and 17, respectively. The molecular formula of a stable compound formed between them is-
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
The oxidation states of transition metal atoms in K2Cr2O7, KMnO4 and K2FeO4, respectively, are x,y and z . The sum of x, y and z is______
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
Identify the compound in which phosphorus exists in the oxidation state of +1.
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
Identify the incorrect statement.
MEDIUM
Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
The oxidation state of sulphur in H2S2O7 is
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
What is the change in oxidation number of carbon in the following reaction?
CH4g+4Cl2g→CCl4+4HClg
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
Which among the following pair of elements show highest oxidation state +7 in their different compounds ? (Atomic no. Cr=24, V=23, Mn=25, Cl=17, S=16)
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
The oxidation number of nitrogen atoms in NH4, NO3 are
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
The metal with the highest oxidation state present in K2CrO4, NbCl5 and MnO2 is-
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
The oxidation states of P atom in POCl3, H2PO3 and H4P2O6 , respectively, are
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Chemistry>Physical Chemistry>Redox Reactions>Oxidation Number
An element X shows +3, oxidation state in its compounds. Out of the four compounds given below, choose the incorrect formula for the element X.