Advertisements
Advertisements
प्रश्न
Why EΘ values for Mn, Ni and Zn are more negative than expected?
उत्तर
Negative E° values of Mn2+ and Zn2+ are because of stabilities of half-filled (3d10 : Mn2+) and fully-filled (3d10 : Zn2+) configuration respectively.Mn2+ ion has higher EΘ value because of highest negative enthalpy of hydrogen.
APPEARS IN
संबंधित प्रश्न
Why do the transition elements have higher enthalpies of atomisation?
How would you account for the irregular variation of ionization enthalpies (first and second) in the first series of the transition elements?
In what way is the electronic configuration of the transition elements different from that of the non-transition elements?
How is the variability in oxidation states of transition metals different from that of the non-transition metals? Illustrate with examples.
Transition elements show magnetic moment due to spin and orbital motion of electrons. Which of the following metallic ions have almost same spin only magnetic moment?
(i) \[\ce{Co^{2+}}\]
(ii) \[\ce{Cr^{2+}}\]
(iii) \[\ce{Mn^{2+}}\]
(iv) \[\ce{Cr^{3+}}\]
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.
The second and third rows of transition elements resemble each other much more than they resemble the first row. Explain why?
Identify the metal and justify your answer.
\[\ce{MO3F}\]
Give reason for the following statement:
[Ti(H2O)]3+ is coloured while [Sc(H2O)6]3+ is colourless.
Explain the magnetic properties of d-block (or transition) elements.
