19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
What is the correct electronic configuration of the central atom in K4[Fe(CN)6] based on crystal field theory? (NEET UG 2019)
Iron carbonyl, Fe(CO)5 is (NEET 2018)
Which one of the following ions exhibits d-d transition and paramagnetism as well? (NEET 2018) (a) 2- Cr O (b) - MnO (c) 2- CrO (d) 2- MnO
The type of isomerism shown by the complex [CoCl2(en)2] is (NEET 2018)
The geometry and magnetic behaviour of the complex [Ni(CO)4] are (NEET 2018)
The correct order of the stoichiometries of AgCl formed when AgNO3 in excess is treated with the complexes: CoCl36NH3, CoCl35NH3, CoCl34NH3 respectively is (NEET 2017)
An example of a sigma bonded organometallic compound is (NEET 2017)
Which of the following has longest C-O bond length? (Free C-O bond length is CO is 1.128Å.) (NEET 2016)
Jahn-Teller effect is not observed in high spin complexes of (NEET 2016)
Which of the following species contains equal number of -and -bonds? (AIPMT 2015)
Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give a test of chloride ions with silver nitrate at 25ºC? (AIPMT 2015)
The complex, [Pt(Py)(NH3)BrCl] will have how many geometrical isomers? [CBSE AIPMT 2011]
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]
[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…
The geometry of Ni(CO)4 and Ni(PPh3)2Cl2 are [Manipal 2006]
Cr3+ form four complexes with four different ligands which are [Cr(Cl)6]3–, [Cr(H2O)6]3+, [Cr(NH3)6]3+ and [Cr(CN)6]3–. The order of CFSE (0) in these complexes is in the order :
The magnitude of crystal field stabilization energy in tetrahedral complexes (CFSE of t ) is considerably less than that in the octahedral field because