Answer
the following questions:
1. What are transition
metals? Give four examples.
2. Explain the oxidation
states of 4d series elements.
3. What are inner
transition elements?
4. Justify the position of
lanthanides and actinides in the periodic table.
5. What are actinides? Give
three examples.
6. Why Gd3+ is
colourless?
7. Explain why compounds of
Cu2+ are coloured but those of Zn2+ are colourless.
8.
Describe the preparation of potassium dichromate.
9.
What is lanthanide contraction and what are the effects of
lanthanide contraction?
10. complete the following
11. What are interstitial
compounds?
12. Calculate the number of
unpaired electrons in Ti3+ , Mn2+ and calculate the spin
only magnetic moment.
13. Write the electronic
configuration of Ce4+ and Co2+.
14. Explain briefly how +2
states becomes more and more stable in the first half of the first row
transition elements with increasing atomic number.
15. Which is more stable? Fe3+
or Fe2+ - explain.
16. Explain the variation in
E0M3+ /M2+ 3d series.
17. Compare lanthanides and
actinides.
18. Explain why Cr2+
is strongly reducing while Mn3+ is strongly oxidizing.
19. Compare the ionization
enthalpies of first series of the transition elements.
20. Actinoid contraction is
greater from element to element than the lanthanoid contraction, why?
21. Out of Lu(OH)3
and La(OH)3 which is more basic and why?
22. Why europium (II) is
more stable than Cerium (II)?
23. Why do zirconium and
Hafnium exhibit similar properties?
24. Which is stronger
reducing agent Cr2+ or Fe2+?
25. The E0M2+
/M value for copper is positive. Suggest a possible reason for this.
26. predict which of the
following will be coloured in aqueous solution Ti2+ , V3+
Sc4+, Cu+ ,Sc3+, Fe3+, Ni2+
and Co3+
27. Describe the variable oxidation
state of 3d series elements.
28. Which metal in the 3d
series exhibits +1 oxidation state most frequently and why?
29. Why first ionization
enthalpy of chromium is lower than that of zinc?
30. Transition metals show
high melting points why?
Related Topics
Copyright © 2018-2021 BrainKart.com; All Rights Reserved. (BS) Developed by Therithal info, Chennai.