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
Calculate magnetic moment of `Fe_((aq))^(2+) ion (Z=26).`
Account for the following:
Cu+2 salts are coloured, while Zn2+ salts are white.
Give reasons:
Transition metals show variable oxidation states.
What may be the stable oxidation state of the transition element with the following d electron configuration in the ground state of its atom?
3d3
How is the variability in oxidation states of transition metals different from that of the non-transition metals? Illustrate with examples.
Metallic radii of some transition elements are given below. Which of these elements will have highest density?
| Element | \[\ce{Fe}\] | \[\ce{Co}\] | \[\ce{Ni}\] | \[\ce{Cu}\] |
| Metallic radii/pm | 126 | 125 | 125 | 128 |
Assertion: Separation of \[\ce{Zr}\] and \[\ce{Hf}\] is difficult.
Reason: Because \[\ce{Zr}\] and \[\ce{Hf}\] lie in the same group of the periodic table.
Why is the `"E"_(("V"^(3+)//"V"^(2+)))^"o"` value for vanadium comparatively low?
The second ionization enthalpies of chromium and manganese are 1592 and 1509 kJ/mol respectively. Explain the lower value of Mn.
The E° value for the Mn2+/Mn2+ couple is more positive than that of Cr3+/Cr2+ or Fe3+/Fe2+ due to the change of:
