Advertisements
Advertisements
प्रश्न
Write the formula of an oxo-anion of Chromium (Cr) in which it shows the oxidation state equal to its group number
Advertisements
उत्तर
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
संबंधित प्रश्न
Why are Mn2+ compounds more stable than Fe2+ towards oxidation to their +3 state?
Describe the oxidising action of potassium dichromate and write the ionic equation for its reaction with iodide.
How is potassium dichromate prepared from chrome iron ore?
Explain why Mn2+ is more stable than Fe2+ towards oxidation to +3 state. (At. no. of Mn = 25, Fe = 26)
When \[\ce{KMnO4}\] solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because ______.
Which of the following ions show higher spin only magnetic moment value?
(i) \[\ce{Ti^3+}\]
(ii) \[\ce{Mn2+}\]
(iii) \[\ce{Fe2+}\]
(iv) \[\ce{Co3+}\]
Match the solutions given in Column I and the colours given in Column II.
| Column I (Aqueous solution of salt) |
Column II (Colour) |
| (i) \[\ce{FeSO2.7H2O}\] | (a) Green |
| (ii) \[\ce{NiCl2.4H2O}\] | (b) Light pink |
| (iii) \[\ce{MnCl2.4H2O}\] | (c) Blue |
| (iv) \[\ce{CoC12,6H2O}\] | (d) Pale green |
| (v) \[\ce{Cu2 Cl2}\] | (e) Pink |
| (f) Colourless |
Answer the following question:
Which element of the first transition series has lowest enthalpy of atomisation?
Give reasons for the following statement:
Transition metals and most of their compounds show paramagnetic behaviour.
The compounds of \[\ce{Ti^4+}\] ions are colourless due to ______.
