Advertisements
Advertisements
Questions
Give reasons for the following statement:
Transition metals and most of their compounds show paramagnetic behaviour.
Give reasons:
Transition metals show paramagnetism.
Why do most of the transition metals show paramagnetic behaviour?
Why do most of the transition metals and their compounds exhibit paramagnetic behaviour?
Explain giving reasons:
Transition metals and many of their compounds show paramagnetic behaviour.
Why do most of the transition metals and their compounds exhibit paramagnetic behaviour? How is their paramagnetic behaviour related to the number of unpaired electrons?
Explain the following:
Transition metals and their compounds generally exhibit a paramagnetic behaviour.
Advertisements
Solution
- They have unpaired electrons in their (n − 1)d orbitals.
- The presence of these unpaired electrons causes attraction towards a magnetic field, resulting in paramagnetic behavior.
- The number of unpaired electrons increases from left to the middle of the transition series, so paramagnetism increases and then decreases towards the end.
- Transition metals or ions with all paired electrons show diamagnetism, not paramagnetism.
Thus, paramagnetism in transition metals arises from unpaired electrons in d-orbitals, causing magnetic moments.
Notes
Students can refer to the provided solutions based on their preferred marks.
APPEARS IN
RELATED QUESTIONS
Calculate the number of unpaired electrons in the following gaseous ions:
Mn3+, Cr3+, V3+ and Ti3+. Which one of these is the most stable in an aqueous solution?
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
Which among the following transition metal has the lowest melting point?
Which of the following will not act as oxidising agents?
(i) \[\ce{CrO3}\]
(ii) \[\ce{MoO3}\]
(iii) \[\ce{WO3}\]
(iv) \[\ce{CrO^{2-}4}\]
When a brown compound of manganese (A) is treated with \[\ce{HCl}\] it gives a gas (B). The gas taken in excess, reacts with \[\ce{NH3}\] to give an explosive compound (C). Identify compounds A, B and C.
Give reason for the following statement:
[Ti(H2O)]3+ is coloured while [Sc(H2O)6]3+ is colourless.
Which of the following characteristics of transition metals is associated with their catalytic activity?
Which one among the following metals of the 3d series has the lowest melting point?
Write the number of unpaired electrons in Cr3+.
(Atomic number of Cr = 24)
Give a reason for the following:
Transition metals possess a great tendency to form complex compounds.
