19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
An octahedral complex is formed when hybrid orbitals or the following type are involved
Which of the following complex ions obeys Sidgwick‘s effective atomic number (EAN) rule?
The effective atomic number for the complex ion [Pd(NH3)6]4+ is
The effective atomic number for the complex ion [Ni(CN)4]2– is
Which of the following ion does not follow EAN rule?
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 :
Mn H O 25–2 12 . Thus it violates EAN rule. Pt NH Fe CN 78 – 4 12 24+0 12 Fe CO 26+ 0 10
The geometry of Ni(CO)4 and Ni(PPh3)2Cl2 are [Manipal 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…
Which of the following complex ions violates the EAN rule?
The pair in which both species have same magnetic moment (spin only value) is [AIIMS 2006]
The number of possible isomers of an octahedral complex [Co(C2O4)2 (NH3)2]– is [AIIMS2006]
Consider the following statements: According the Werner‘s theory. 1. Ligands are connected to the metal ions by covalent bonds. 2. Secondary valencies have directional properties 3. Secondary valencies are non-ionisab…
In the complex with formula MCl3. 4H2O, the coordination number of the metal M is six and there is no molecule of hydration in it. The volume, if 0.1 M AgNO3 solution needed to precipitate the free chloride ions in 20…
Among the following, the species having square planar geometry for central atom are [AIIMS2006] (i) XeF4 (ii) SF4 (iii) [NiCl4] 2– (iv) [PtCl4] 2–
On treatment of 100 mL of 0.1 M solution of CoCl3.6H2O with excess of AgNO3; 1.2 × 1022 ions are precipitated. The complex is
A coordination complex compound of cobalt has the molecular formula containing five ammonia molecules, one nitro group and two chlorine atoms for one cobalt atom. One mole of this compound produces three mole ions in …
Excess of silver nitrate solution is added to 100 mL of 0.01 M pentaaquachlorochromium (III) chloride solution. The mass of silver chloride obtained (in gram) is [Atomic mass of silver is 108]
In which of the following coordination entities the magnitude of o (CFSE in octahedral field) will be maximum? (At. no. Co = 27) [CBSE AIPMT2007]
Mixture X = 0.02 mole of [Co (NH3)5 SO4] Br and 0.02 mole of [Co(NH3)5 Br] SO4 was prepared in 2L of solution. 1 L of mixture X + excess AgNO3-> Y 1 L of mixture X + excess BaCl2-> Z Number of moles of Y and Z are
Which of the following will give a pair of enantiomorphs? (en = NH2CH2CH2NH2) [CBSE AIPMT 2007]
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]
A coordination compound of cobalt has the molecular formula containing five ammonia molecules, one nitro group and two chlorine atoms for one cobalt atom. One mole of this compound produces three moles of ions in an a…
The number of ions formed from a molecule of potassium ferrocyanide in aqueous solution is
The IUPAC name for [Pt(NH3)3(Br)(NO2)(Cl)]Cl is