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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?
why do the transition elements show variable oxidation states?
Zn salts are white while Cu2+ salts are coloured. WHY?
why (MnO4)2- is paramagnetic and (MnO4)1- is dimaganetic
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?
Co2+ is easily oxidised to Co3+ ion in the presence of ligands .WHY?
.La3+ (Z=57) and Lu3+ (Z=71) do not show any coloured solution. why?
what is meant by poor shielding effect ?
i agree that V2+ is more stable than V3+, but what is the main reason behind it ?
IUPAC NAME OF K3[Al(C2O4)3]
which has poor shielding effect 4f or 5f ?
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?
CrO is basic but Cr2O3is amphoteric ?
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.
What does M2+/M and M3+/M2+ mean?
transition elements form alloys
Europium(II) is more stable trhan Cerium (II)
Cr2+ is a stronger reducing agent than Fe2+ .why?
plz ans in short
WHY ONLY MERCURY EXIST AS LIQUID AT ROOM TEMPERATURE, BUT ELEMENTS LIKE Zn Cd ARE SOLID AT ROOM TEMPERATURE?
Describe preparation of KMnO4 from pyrolusite.
''Permanganate exhibits weak temperature dependent paramagnetism''.Does it mean its paramagnetism is weak or it's weakly dependent on temperature?
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 iron does not exibit +5 oxidation state ?
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.
Mn3+ and Co3+ ions are the strongest oxidising agents in aqueous solution.
cu2+ is coloured but cu+ is not and sc2+ is colured but sc3+ is not why????
Why Sc can't form MO oxides
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.
the d orbitals of th transition elements project to the periphery od an atom more than the other orbitals ( s and p ) hence they are more influences by the surroundings as well as affecting the atoms and molecules surrounding them.....WHAT DOES THIS MEAN ??? (this statement is given in the ncert)
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.
what is meant by --
tarnish rapidly in air.
1. In the first transition series only copper has positive electrode potential. Why?
PLEASE ANSWER AS EARLY AS POSSIBLE!!!!!!!!!!
why Zn,Cd,Hg are known as pseudo transition elements?
Zn, Cd, and Hg are not regarded as transition elements and why Uub is regarded as transition elements
Ce3+ is easily oxidised to Ce4+. WHY?
why are scandium salts white in colour
The e value for copper is positive (+ 0.34V). What is possible reason for this?
which is stronger reducing agent fe2+ or cr2+ and why???
Why are transition metals good catalysts??
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.
whyscandium is notincluded in the series of standard electrode potential.
hcl is not used to acidify a permanganate solution in volumetric estimation of Fe+ or C2O42-
Why the third ionisation enthalpy of Mn is generally exceptionally high?
Why do Mn & Tc have low melting points?
How does the colour of K2Cr2O7 solution depends on pH of the solution?
why are enthalpies of atomisation of 4d and 5d series are greater than 3d series?
why transition metals in low oxidation states act as acids...???plzzz explain...
Cr3+ is most stable ion in aqueous solution. Why?
5f, 6d, and 7ssubshells are of comparable energies. what does it mean
ans fast plzzzzzzz
Transition metals exhibits higher oxidation state in oxides and fluorides WHY?
what does transition metals have low volatility mean?
why is scandium(2) virtually unknown
Why do transition elements have high melting & boiling point?
why metal metal bonding is more frequent for the 4d and the 5d series of transtion metals than that for the 3d series????????????
why Transition elements show highest oxidation state in their oxides thanfluorides?
.It is difficult to separate lanthanoids in pure state.
What is lanthanoid contraction & what ar the consequences of lanthanoid contraction?
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