Advertisements
Advertisements
प्रश्न
Calculate the oxidation number of the underlined atom.
Cr2O72−
Advertisements
उत्तर
Cr2O72−
Oxidation of O = –2
\[\ce{Cr2O^2-_7}\] is an ionic species.
∴ Sum of the oxidation numbers of all atoms = – 2
∴ 2 × (Oxidation number of Cr) + 7 × (Oxidation number of O) = – 2
∴ 2 × (Oxidation number of Cr) + 7 × (–2) = – 2
∴ 2 × (Oxidation number of Cr) – 14 = – 2
∴ 2 × (Oxidation number of Cr) = – 2 + 14
∴ Oxidation number of Cr = `+12/2`
∴ Oxidation number of Cr in \[\ce{Cr2O^2-_7}\] = +6
APPEARS IN
संबंधित प्रश्न
Choose the correct option.
Oxidation numbers of Cl atoms marked as Cla and Clb in CaOCl2 (bleaching powder) are
\[\begin{array}{cc} \ce{Cl^{{a}}}\phantom{.} \\/\phantom{...} \\ \ce{Ca}\phantom{......} \\ \backslash\phantom{..} \\\phantom{........} \ce{O-Cl^{{b}}}\phantom{.} \end{array}\]
Choose the correct option.
A compound contains atoms of three elements A, B, and C. If the oxidation state of A is +2, B is +5 and that of C is -2, the compound is possibly represented by
Calculate the oxidation number of the underlined atom.
H2SO4
Calculate the oxidation number of the underlined atom.
K2C2O4
Calculate the oxidation number of the underlined atom.
H2S4O6
Calculate the oxidation number of the underlined atom.
NaH2PO4
Identify the following pair of species is in its oxidized state?
Cu/Cu2+
Identify the following pair of species is in its oxidized state?
Cl2/Cl−
Provide the stock notation for the following compound:
HAuCl4
Assign oxidation number atom in the following species.
H3BO3
Which of the following redox couple is a stronger oxidizing agent?
Cl2 (E0 = 1.36 V) and Br2 (E0 = 1.09 V)
Which of the following redox couple is a stronger oxidizing agent?
\[\ce{MnO^Θ_4}\](E0 = 1.51 V) and \[\ce{Cr2O^{2Θ}_7}\](E0 = 1.33 V)
Complete the following table:
Assign oxidation number to the underlined species and write Stock notation of compound
| Compound | Oxidation number | Stock notation |
| AuCl3 | ||
| SnCl2 | ||
| \[\ce{\underline{{V}}_2O^{4-}_{7}}\] | ||
| \[\ce{\underline{{Pt}}Cl^2-_6}\] | ||
| H3AsO3 |
What is the oxidation number of Mn in \[\ce{MnO^{2-}_4}\] ion?
In the reaction,
\[\ce{MnO^{-1}_4 (aq) + Br^{-1}(aq) -> MnO2(s) + BrO^{-1}_3(aq)}\]
the correct change in oxidation number of the species involved is ______.
Which of the following is NOT an example of redox reaction?
In the complex [Co(en)3]Cl3, ____________.
In the following reaction, the oxidation number of Cr changes.
\[\ce{ClO^-_{( aq)} + Cr(OH)^-_{4(aq)} -> CrO^{2-}_{4(aq)} + Cl^-_{( aq)} (basic)}\]
The oxidation number of sulphur in S8 molecule is ______.
In which of the following, oxidation number of oxygen is +2?
Stock notations are used to specify the oxidation numbers of ____________.
The sum of oxidation states of all atoms in \[\ce{Cr2O^{2-}_7}\] ion is ______.
The oxidation number of Cr in \[\ce{Cr(OH)^-_4}\] ion is ______.
What is the oxidation state of chlorine atom in perchloric acid?
The brown ring complex is formulated as [Fe(H2O)5NO]SO4. The oxidation number of iron is ______.
What is the average oxidation number of sulphur in tetrathionate ion?
Among group 16 elements, which one does not show −2 oxidation state?
In which of the compounds does ‘manganese’ exhibit the highest oxidation number?
Which of the following changes exhibit that nitrogen undergoes oxidation?
