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What are alloys?
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|
1
|
1072
|
November 3, 2016
|
|
What are inner-transition elements?
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|
1
|
647
|
November 3, 2016
|
|
Write one similarity and one difference between the chemistry of lanthanoids and that of actinoids
|
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0
|
4635
|
November 3, 2016
|
|
With reference to the structural variability and chemical reactivity
|
|
1
|
3459
|
November 3, 2016
|
|
The chemistry of the actinoid elements is not so smooth as that of the lanthanoids
|
|
1
|
1046
|
November 3, 2016
|
|
Write the electronic configuration of the elements with the atomic numbers 61, 91, 101, 109
|
|
0
|
2756
|
November 3, 2016
|
|
Use Hund’s rule to derive the electronic configuration
|
|
1
|
2037
|
November 3, 2016
|
|
Although Zr belongs to 4d and Hf belongs to 5d transition series but it is quite difficult to separate them, why?
|
|
0
|
2953
|
November 3, 2016
|
|
Actinoid contraction is greater from element to element than lanthanoid contraction. Why?
|
|
0
|
2491
|
November 3, 2016
|
|
A black mineral A on treatment with dilute sodium cyanide solution
|
|
1
|
1875
|
November 3, 2016
|
|
A violet compound of manganese 'A’ decomposes on heating to liberate oxygen
|
|
1
|
3960
|
November 3, 2016
|
|
Complete the following chemical equations
|
|
1
|
1410
|
November 3, 2016
|
|
Explain why does colour of $KMnO _{ 4 }$ disappear when oxalic acid is added to its solution in acidic medium?
|
|
0
|
1414
|
November 3, 2016
|
|
Describe the oxidising action of potassium dichromate
|
|
1
|
6439
|
November 3, 2016
|
|
What can be inferred from the magnetic moment values of the following complex species?
|
|
1
|
1794
|
November 3, 2016
|
|
Comment on the statement that elements of the first transition series possess many properties different from those of heavier transition elements
|
|
0
|
1508
|
November 3, 2016
|
|
Compare the general characteristics of the first series of the transition metals
|
|
1
|
2974
|
November 3, 2016
|
|
What is meant by disproportionation? Give two examples of disproportionation reaction in aqueous solution
|
|
0
|
5831
|
November 3, 2016
|
|
Why do transition elements show variable oxidation states?
|
|
1
|
9543
|
November 3, 2016
|
|
The halides of transition elements become more covalent with increasing oxidation state of the metal. Why?
|
|
0
|
4893
|
November 3, 2016
|
|
An aqueous blue coloured solution of transition metal sulphate reacts
|
|
1
|
2744
|
November 3, 2016
|
|
What are the interstitial compounds? Why are such compounds well known for transition metals?
|
|
0
|
6630
|
November 3, 2016
|
|
Predict which of the following will be coloured in aqueous solution?
|
|
0
|
860
|
November 3, 2016
|
|
Explain why ${{Cu}^{+}}$ ion is not stable in aqueous solution?
|
|
1
|
1017
|
November 3, 2016
|
|
For the first row transition metals, the E° values are given below:
|
|
1
|
1896
|
November 3, 2016
|
|
Why E° values for Mn, Ni and Zn are more negative than expected?
|
|
0
|
8129
|
November 3, 2016
|
|
Which metal in the first series of transition metals exhibits + 1 oxidation state most frequently and why?
|
|
0
|
2575
|
November 3, 2016
|
|
How is the variability in oxidation states of transition metals different from that of the non-transition metals? Illustrate with examples
|
|
0
|
2466
|
November 3, 2016
|
|
Name the oxometal anions of the first series of the transition metals
|
|
1
|
1503
|
November 3, 2016
|
|
What are the transition elements? Write the two characteristics of the transition elements
|
|
0
|
4995
|
November 3, 2016
|