Advertisements
Advertisements
Question
Write the formula of an oxo-anion of Chromium (Cr) in which it shows the oxidation state equal to its group number
Advertisements
Solution
Formula of oxo-anion of chromium (Cr) in which it shows the oxidation state equal to its group number (6) is `Cr_2O_7^(2-)`
2Cr + (-2 ×7) = -2
2Cr - 14 = -2
2Cr = 12
Cr = +6
Oxidation of Cr in `Cr_2O_7^(2-)`is +6 which is equal to its group number 6.
APPEARS IN
RELATED QUESTIONS
Why are Mn2+ compounds more stable than Fe2+ towards oxidation to their +3 state?
\[\ce{KMnO4}\] acts as an oxidising agent in acidic medium. The number of moles of \[\ce{KMnO4}\] that will be needed to react with one mole of sulphide ions in acidic solution is ______.
Transition elements show high melting points. Why?
Although \[\ce{Cr^3+}\] and \[\ce{Co^2+}\] ions have same number of unpaired electrons but the magnetic moment of \[\ce{Cr^3+}\] is 3.87 B.M. and that of \[\ce{Co^2+}\] is 4.87 B.M. Why?
Assertion: The highest oxidation state of osmium is +8.
Reason: Osmium is a 5d-block element.
Transition metals can act as catalysts because these can change their oxidation state. How does \[\ce{Fe(III)}\] catalyse the reaction between iodide and persulphate ions?
The standard electrode potentials of four elements A, B, C and D are – 3.05, – 1.66, – 0.40 and + 0.80. The highest chemical reactivity will be exhibited by
Which of the following statements is not correct?
Why are all copper halides known except that copper iodide?
The E° value for the Mn2+/Mn2+ couple is more positive than that of Cr3+/Cr2+ or Fe3+/Fe2+ due to the change of:
