Advertisements
Advertisements
प्रश्न
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
Advertisements
उत्तर
The stable oxidation state will be +5 due to the outer electronic configuration 3d3 4s2 (+2, +3, +4, +5).
संबंधित प्रश्न
|
`E_((M^(2+)/M)` |
Cr | Mn | Fe | Co | Ni | Cu |
| -0.91 | -1.18 | -0.44 | -0.28 | -0.25 | -0.34 |
From the given data of E0 values, answer the following questions :
(1) Why is `E_(((Cu^(2+))/(Cu)))` value exceptionally positive
(2) Why is `E_(((Mn^(2+))/(Mn)))` value is highly negative as compared to other elements
(3) Which is the stronger reducing agents Cr2+ or Fe2+ ? Give Reason.
The \[\ce{E^{\circ}_{(M^{2+}/M)}}\] value for copper is positive (+0.34 V). What is possible reason for this? (Hint: consider its high ΔaH° and low ΔhydH°)
Predict which of the following will be coloured in the aqueous solution?
Ti3+, V3+, Cu+, Sc3+, Mn2+, Fe3+ and Co2+. Give reasons for each.
How would you account for the following:
Of the d4 species, Cr2+ is strongly reducing while manganese (III) is strongly oxidising.
What is meant by ‘disproportionation’?
Which metal in the first series of transition metals exhibits +1 oxidation state most frequently and why?
Which one of the following ions is coloured?
When \[\ce{KMnO4}\] solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because ______.
Although fluorine is more electronegative than oxygen, but the ability of oxygen to stabilise higher oxidation states exceeds that of fluorine. Why?
Assertion (A): Cu cannot liberate hydrogen from acids.
Reason (R): Because it has positive electrode potential.
It has been observed that first ionization energy of 5 d series of transition elements are higher than that of 3d and 4d series, explain why?
Catalytic hydrogenation of benzene gives
Sodium this sulphate is used in photography because of its:-
The basic character of transition metals monoxide follow the order.
Which of the following ions acts as a typical transition metal ion?
The oxidation state of Fe in [Fe(CO)5] is ______.
Which property of transition metals enables them to behave as catalysts?
Account for the following:
Zirconium (Zr) and Hafnium (Hf) are difficult to separate.
Give a reason for the following.
Some transition metals and their compounds get attracted towards the magnetic field.
Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following point:
Atomic sizes
