Home
Class 11
CHEMISTRY
The sum of oxidation numbers fo all the ...

The sum of oxidation numbers fo all the atoms in the dichromate ion is .

A

`-3`

B

`-1`

C

`-4`

D

`-2`

Text Solution

Verified by Experts

The correct Answer is:
D
Dichromate ion is `Cr_2O_7^(2-)`. In a polyatomic ion, the sum of oxidation numbers fo all the atoms in the ion must be equal to the net charge fo the ion. However, in a neutral molecule , the sum of the oxidation numbers of all the atoms must be zero.
Promotional Banner

Topper's Solved these Questions

  • REDOX REACTIONS

    R SHARMA|Exercise Follow-up Test 4|15 Videos

  • REDOX REACTIONS

    R SHARMA|Exercise Follow-up Test 5|8 Videos

  • REDOX REACTIONS

    R SHARMA|Exercise Follow-up Test 2|5 Videos

  • PURIFICATION AND CHARATERIZATION OF ORGANIC COMPOUNDS

    R SHARMA|Exercise Archives|38 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    R SHARMA|Exercise Archives|26 Videos

Similar Questions

Explore conceptually related problems

Oxidation number is the charge assigned to an atom of a molecule or ion according to some arbitry rules .In neutral molecules , the sum of the oxidation numbers of all the atoms present is zero while in a simple or complex ion it is equal to the net charge on ion. In some cases the oxidation number may be even fractional. Athough sometimes a particular elemenet may have same valency and oxidation state but these are based upon different concepts.The number of oxidation states available for a particular elements are normally more than the valencies A brown complex has the formula: [Fe(H_(2))(O)_(5)NO]SO_(4) the oxidation number of iron is:

Calculate the oxidation number of all the atoms in the following compounds and ions: a. PbSO_(4) , b. CrO_(4)^(2-) , c. Sb_(2)O_(5) , d. NH_(4)_(2)SO_(4)

" The algebraic sum of the oxidation numbers of all atoms in a compound must be "

Oxidation number of chromium in potassium dichromate is