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Transition metals have high enthalpies of atomization.
Explain why Cr2+ is reducing but Mn3+ is oxidising while both ions have d4 configuration?
Zn salts are white while Cu2+ salts are coloured. WHY?
why do the transition elements show variable oxidation states?
what is the magnetic moment of K3[FeF6] ?
1.why transition metals and their compounds act as a catalyst?
2.The outer electronic configurations of two members of the lanthanide series as follows:4f15d16s2 and 4f75d06s2.what are their atomic numbers?predict the oxidation states exhibited by these elements in their compounds?
1. explain why cu+ ion is not stable in aqueous solution?
2. explain why Ce4+ is a stronger oxidizing agent?
3. which is stronger reducing agent Cr2+, or Fe2+ and why?
4. Describe the oxidizing property of KMnO4 in neutral of alkaline medium for its reaction with iodide irons and thiosulphate irons.
5. What is magnetic moment of Cr3+ ion?
6. why do transition metals form alloys?
7. Why is V2+ is more Stable than V3+
what is lanthanoid and actinoids contraction?
Cr3+ is most stable ion in aqueous solution. Why?
Co2+ is easily oxidised to Co3+ ion in the presence of ligands .WHY?
out of CuCl2 and Cu2CL2 which is more stable please explain the reason ???
what is meant by poor shielding effect ?
IUPAC NAME OF K3[Al(C2O4)3]
The e value for copper is positive (+ 0.34V). What is possible reason for this?
describe the preparation of k2cr2o7 from chromite ore and explain the reaction of k2cr2o7 with acid FeSo4 , KI and H2S ?
Why Zr and Hf have identical sizes?
nickel does not form low spin octahedral complexes
La(OH)3 is more basic than Lu(OH)3. Give reason...
what is difference between valency and oxidation state with egs and detail.
Explain the chemistry behind chromyl chloride test.
.La3+ (Z=57) and Lu3+ (Z=71) do not show any coloured solution. why?
transition elements form alloys
Cr2+ is a stronger reducing agent than Fe2+ .why?
plz ans in short
Describe preparation of KMnO4 from pyrolusite.
WRite the electronic configuration of ti4+ ion
What is the effect of increasing pH on a solution of potassium dichromate????
plz help me in dis!!
Why is oxygen a gas and Sulphur a solid ?
why (MnO4)2- is paramagnetic and (MnO4)1- is dimaganetic
why is ferric chloride preferred over potassium chloride in case of a cut leading to bleeding?
What is meant by disproportionation? Give one example of disproportionation reaction in aqueous solution.
Explain why Mo(VI) and W(VI) are found to be more stable than Cr(VI).
Give Explanatory answer that I can write in Board Exam.
cu2+ is coloured but cu+ is not and sc2+ is colured but sc3+ is not why????
Transition metals and many of their compounds show paramagnetic
The enthalpies of atomisation of the
transition metals are high.
The transition metals generally form
Transition metals and their many
compounds act as good catalyst.
hcl is not used to acidify a permanganate solution in volumetric estimation of Fe+ or C2O42-
the preparation of potassium permanganate. How does the acidified
permanganate solution react with (i) iron(II) ions (ii) SO2
and (iii) oxalic acid?
Write the ionic equations for the reactions.
1. In the first transition series only copper has positive electrode potential. Why?
PLEASE ANSWER AS EARLY AS POSSIBLE!!!!!!!!!!
Zn, Cd, and Hg are not regarded as transition elements and why Uub is regarded as transition elements
which is stronger reducing agent fe2+ or cr2+ and why???
Ce3+ is easily oxidised to Ce4+. WHY?
Why are transition metals good catalysts??
Europium(II) is more stable trhan Cerium (II)
why metal metal bonding is more frequent for the 4d and the 5d series of transtion metals than that for the 3d series????????????
Unlike Cr3+. Mn2+, Fe3+ & the subsequent other M2+ ions of the 3d series of elements, the 4d & the 5d series metals generally do not form stable cationic species.Give reason in brief.......ans quick
Why the third ionisation enthalpy of Mn is generally exceptionally high?
How many nodal planes do SIGMA STAR 2pz have??
Why do Mn & Tc have low melting points?
How does the colour of K2Cr2O7 solution depends on pH of the solution?
How would you account for the increasing oxidising power in series VO2+ < Cr2O72- < MnO4- ?
Which is more covalent ZnCl2 or CuCl ? and why ?
which has poor shielding effect 4f or 5f ?
ans fast plzzzzzzz
Transition metals exhibits higher oxidation state in oxides and fluorides WHY?
why are scandium salts white in colour
Which of the following shows maximum number of different oxidation states in its compounds? Why?
A. Eu B. La C. Gd D. Am
Why do transition elements have high melting & boiling point?
In any transition metal series enthalpy of atomisation increases from left to right reaches a maximum almost in the middle and then decreases WHY?
why in (MnO4) 1- all bonds formed between Mn and O2 are covalent????
why Transition elements show highest oxidation state in their oxides thanfluorides?
Why is co3+ not stable in aqueous solution...???
Though E values suggest but why does it happen
Like Cr3+ has half filled t2g so it is stable.....
What happens to cobalt then....?????
What is lanthanoid contraction & what ar the consequences of lanthanoid contraction?
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