19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
AgCl is dissolved in excess of each of NH3, KCN and Na2S2O3. The complex ions produced in each case are (AMU 2010)
Which of the following 0.1 M complex compound solutions will have the minimum electrical conductivity? [Guj. CET 2010]
The effective atomic number of Cr (atomic no. 24) in [Cr(NH3)6]Cl3 is [Manipal 2010]
Four transition metal octahedral complexes, (the choice given below) low spin electron configurations arises only for [DPMT 2010]
Which of the following species is expected to be colourless? [CBSE AIPMT 2010]
Assertion: If 4 for [Cu(NH3)4] 2+ is 2.1 × 10 13, its instability constant is 4.76 × 10 –14. Reason: Overall dissociation equilibrium constant varies inversely with formation constant. [AIIMS2010]
Which of the following complex ion is not expected to absorb visible light? [CBSE AIPMT 2010]
Crystal field stabilisation energy for high spin d octahedral complex is [CBSE AIPMT2010]
The existence of two different coloured complexes with the composition [Co(NH3)4Cl2] + is due to [CBSE AIPMT2010]
The coordination compound of which one of the following compositions will produce two equivalents of AgCl on reaction with aqueous silver nitrate solution? [J&K CET 2009]
Again for [Fe(H2O)6]Cl3, since H2O is a weak field ligand, the unpaired electrons will not get paired up. Thus the hybridization of Fe will besp 3d 2. So, the reason is not correct. Hence, the correct option is (c).
Assertion: K4[Fe(CN)6] is diamagnetic and [Fe(H2O)6]Cl3 is paramagnetic. Reason: Hybridisation of central metal in K4[Fe(CN)6] is sp3d2, while in [Fe(H2O)6]Cl3 is d 2sp 3. [AIIMS 2009]
Assertion: CO and CN are referred as acid ligands. Reasaon: In CO and CN vacant type orbitals are present. [AIIMS 2009]
Which of the following coordination entities should be expected to absorb light of lowest frequency?[AIIMS2009]
Which of the following complex ion is expected to absorb visible light? [CBSE AIPMT 2009]
How many electrons are present in 3d orbital of tetrahedral K2[NiCl4] complex? [Guj. CET 2008]
Which of the following complexes exhibit the highest paramagnetic behaviour? (where, gly = glycine, en = ethylenediammine and bpy = bipyridyl moities) (At. no : Ti = 22, V = 23, Fe = 26, Co = 27) [CBSE AIPMT 2008]
Which of the following complex ions, which is diamagnetic in nature? [CBSE AIPMT 2008]
The d-electron configuration of Cr 2+, Mn 2+, Fe 2+ and Co 2+ are d 4, d 5, d 6 and d 7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour? [CBSE AIPMT 2007]
Which of the following will give a pair of enantiomorphs? (en = NH2CH2CH2NH2) [CBSE AIPMT 2007]
In which of the following coordination entities the magnitude of o (CFSE in octahedral field) will be maximum? (At. no. Co = 27) [CBSE AIPMT2007]
Among the following, the species having square planar geometry for central atom are [AIIMS2006] (i) XeF4 (ii) SF4 (iii) [NiCl4] 2– (iv) [PtCl4] 2–
The number of possible isomers of an octahedral complex [Co(C2O4)2 (NH3)2]– is [AIIMS2006]
The pair in which both species have same magnetic moment (spin only value) is [AIIMS 2006]
[Cr(H2O)6]Cl3 (at. no. of Cr = 24) has a magnetic moment of 3.83 BM, the correct distribution of 3d- electrons in the chromium of the complex is [CBSE AIPMT 2006] (a) xz x -y , x 3d 3d ,3d (b) xy x -y , 3d ,3d 3d , yz…