Nickel (Z = 28) combines with a uninegative monodentate ligand X ^- to form a paramagnetic complex [NiX₄]^2- . The number of unpaired electron(s) in the nickel and geometry of this complex ion are respectively

1) one, tetrahedral
2) two, tetrahedral
3) one, square planar
4) two, square planar

In which of the following compounds iron has lowest oxidation state 

Which of the following is correct order of cyrstal field splitting.

1) C-donor >  N-donor > O-donor
2) N-donor >  O-donor >  C-donor
3) C-donor >  O-donor >  N-donor
4) O-donor >  N-donor >  C-donor

How many moles of KMnO₄ are needed to oxidise a mixture of 1 mole of each FeSO₄ and FeC₂O₄ in acidic medium?

1) 4 / 5
2) 5 /4
3) 3 /4
4) 5 /3

The one which decreases with dilution is

1) molar conductance

2) conductance

3) specific conductivity

4) None of these

Among the ligands NH₃, en, CN^– and CO the correct order of their increasing field strength, is:  
 

Calculate volume of the gases liberated at STP if 1 L of 0.2 molar solution of CuSO4 is electrolysed by 5.79 A current for 10000 seconds.

1)  5.6 L
2)  2.56 L
3)  50.6 L.
4)  none

Which of the following isomerism is shown by ethyl acetoacetate?

1)  Diastereoisomerism

2)  Geometry isomerism

3)  Keto-enol isomerism

4)  Enantisomerism

A 0.2M solution of formic acid is 3% ionised. The value of ionization constant is

1) 1.8
2) 1.8 × 10^-4
3) 0.018
4) 18

Select the correct order of C-O bond order in mixed phosphine carbonyl complex :

1) $$[(Ph_3P)_3Mo(CO)_3] > [(Ph_2PCl)_3Mo(CO)_3] < (PhPCl_2)_3 Mo (CO)_3]$$
2) $$[(Ph_3P)_3Mo(CO)_3] > [(Ph_2PCl)_3Mo(CO)_3] > (PhPCl_2)_3 Mo (CO)_3]$$
3) $$[(Ph_3P)_3Mo(CO)_3] = [(Ph_2PCl)_3Mo(CO)_3] > (PhPCl_2)_3 Mo (CO)_3]$$
4) $$[(Ph_3P)_3Mo(CO)_3] < [(Ph_2PCl)_3Mo(CO)_3] > (PhPCl_2)_3 Mo (CO)_3]$$