Advertisements
Advertisements
Question
On the basis of the figure given below, answer the following questions:
- Why Manganese has lower melting point than Chromium?
- Why do transition metals of 3d series have lower melting points as compared to 4d series?
- In the third transition series, identify and name the metal with the highest melting point.
Advertisements
Solution
- Manganese is having lower melting point as compared to chromium, as it has highest number of unpaired electrons, strong interatomic metal bonding, hence no delocalisation of electrons.
- There is much more frequent metal-metal bonding in compounds of the heavy transition metals i.e 4d and 5d series, which accounts for lower melting point of 3d series.
- Tungsten
APPEARS IN
RELATED QUESTIONS
Why are Mn2+ compounds more stable than Fe2+ towards oxidation to their +3 state?
An antifriction alloy made up of antimony with tin and copper, which is extensively used in machine bearings is called _______.
(A) Duralumin
(B) Babbitt metal
(C) Spiegeleisen
(D) Amalgam
Complete and balance the following chemical equations
`Fe^(2+) + MnO_4^(-) + H^+ ->`
The transition metals show _________ character because of the presence of unpaired· electrons and Cu+ is ____________ because of its electronic configuration is [Ar]3d10
Explain why Mn2+ is more stable than Fe2+ towards oxidation to +3 state. (At. no. of Mn = 25, Fe = 26)
Which is the most stable oxidation state of iron?
Explain why does colour of KMnO4 disappear when oxalic acid is added to its solution in acidic medium.
Assertion (A): Cu cannot liberate hydrogen from acids.
Reason (R): Because it has positive electrode potential.
A transition element X has an electronic configuration [Ar]4s23d3. Predict its likely oxidation states.
Explain the magnetic properties of d-block (or transition) elements.
