Advertisements
Advertisements
प्रश्न
Give reasons for the following statement:
Zn, Cd, and Hg are soft metals.
Zn, Cd, and Hg are soft metals. Why?
Advertisements
उत्तर
Metal atoms like Zn, Cd and Hg have completely filled d-orbitals (d10 configuration). Thus, d-electrons are not available for metallic bond formation. As a result, these metals are quite soft and also have low melting points.
APPEARS IN
संबंधित प्रश्न
Explain why is Fe3+ more stable than Fe2+?
How would you account for the following?
Transition metals exhibit variable oxidation states.
ln which pair highest oxidation states of transition metals are found:
|
`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.
Use Hund’s rule to derive the electronic configuration of Ce3+ ion and calculate its magnetic moment on the basis of ‘spin-only’ formula.
The magnetic nature of elements depends on the presence of unpaired electrons. Identify the configuration of transition element, which shows highest magnetic moment.
Although fluorine is more electronegative than oxygen, but the ability of oxygen to stabilise higher oxidation states exceeds that of fluorine. Why?
Which of the following ions will exhibit colour in aqueous solution?
In order to protect iron from corrosion, which one will you prefer as a sacrificial electrode, Ni or Zn? Why? (Given standard electrode potentials of Ni, Fe and Zn are -0.25 V, -0.44 V and -0.76 V respectively.)
‘Spin only’ magnetic moment is the same for which of the following ions?
- Ti3+
- Cr2+
- Mn2+
- Fe2+
- Sc3+
Choose the most appropriate answer from the options given below:
