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1.
2.
Generally transition elements form coloured salts due to the presence of unpaired electrons. Which of the following compounds will be coloured in solid state?
3.
On addition of small amount of KMnO? to concentrated H?SO?, a green oily compound is obtained which is highly explosive in nature. Identify the compound from the following.
4.
KMnO? gets reduced to
5.
The electronic configuration of Cu(II) is 3d9 whereas that of Cu(I) is 3d10. Which of the following is correct?
6.
Out of Mn?O? V?O?, V?O?, CrO, Cr?O?, the basic oxides are
7.
The oxidation state of Cr in final product formed by reaction of KI and acidified dichromate solution is
8.
KMnO? is not acidified by HCl instead of H?SO? because
9.
The colour of KmnO, is due to
10.
Which of the following lanthanoid ion is diamagnetic? (At No. of Ce = 58, Sm = 62, Eu = 63 Yb = 70)