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1.
In aqueous solution 
ion acts as
ion acts as
2.
Transition elements form complexes because of:
3.
Philosopher's wool on heating with BaO at 1100
C produce
C produce
4.
Which of the following trivalent ion has the largest atomic radii in the lanthanide series?
5.
Ferrous ion changes to X ion, on reacting with acidified hydrogen peroxide. The number of 
-electrons present in X and its magnetic moment (in BM) are, respectively
-electrons present in X and its magnetic moment (in BM) are, respectively
6.
Which of the following is amphoteric oxide?
7.
The valence shell electronic configuration of 
ion is
ion is
8.
Which of the following ore is an ore of copper?
9.
Chinese white is:
10.
Cerium 
is an important member of the lanthanides. Which of the following statement about cerium is incorrect?
is an important member of the lanthanides. Which of the following statement about cerium is incorrect?