MCQ ON CO-ORDINATION COMPOUNDS

The coordination number and oxidation state of in are, respectively [CBSE PMT 1995] (a) 4 and +2 (b) 6 and +3 (c) 3 and +3 (d) 3 and 0 The complex compounds which result from the coordination of carbon monoxide are known as [BHU 1999] (a) Electronic (b) Carbonyls (c) Carbonates (d) Carbon permono Mixture of and 0.02 mol of was prepared in 2 litre of solution 1 litre of mixture X + excess . 1 litre of mixture X + excess Number of moles of Y and Z are [IIT JEE 2003] (a) 0.01, 0.01 (b) 0.02, 0.01 (c) 0.01, 0.02 (d) 0.02, 0.02 Which of the following organometallic compound is and bonded [MH CET 2001; PCET 2002] (a) (b) (c) (d) In the valency and coordination number of will be respectively (a) 3 and 6 (b) 2 and 4 (c) 4 and 2 (d) 4 and 4 Co-ordination number of in the complexes and would be respectively [MP PET 2003] (a) 2, 3, 3 (b) 6, 6, 4 (c) 6, 3,3 (d) 6, 4, 6 On hydrolysis will produce [IIT-JEE 2003] (a) (b) (c) (d) Which of the following represents a chelating ligand [JIPMER 2002] (a) (b) (c) (d) reacts with solution and forms [MP PMT 1992; IIT 1996; UPSEAT 2001, 02] (a) (b) (c) (d) In the process of extraction of gold, Roasted gold ore Identify the complexes [X] and [Y] [IIT-JEE 2003] (a) (b) (c) (d) A solution of potassium ferrocyanide would contains ...... ions [KCET 1990] (a) 2 (b) 3 (c) 4 (d) 5 Which one of the following complexes is an outer orbital complex [AIEEE 2004] (a) (b) (c) (d) Atomic nos : Which one of the following has largest number of isomers ? [AIEEE 2004] (a) (b) (c) (d) (R = alkyl group; en = ethylenediamine) Which kind of isomerism is exhibited by octahedral ? [IIT-JEE Screening 2005] (a) Geometrical and Ionization (b) Geometrical and Optical (c) Optical and Ionization (d) Geometrical only Which one of the following is expected to exhibit optical isomerism (en = ethylenediamine) (a) cis – (b) trans – (c) trans – (d) cis – is a: [UPSEAT 2004] (a) Monodentate ligand (b) Bidentate ligand (c) Quadridentate ligand (d) Hexadentate ligand Which of the following statements is incorrect ? [KCET 2004] (a) In the ligand has satisfied only the secondary valency of ferric ion. (b) In the ligand has satisfied both primary and secondary valencies of ferric ion. (c) In the ligand has satisfied both primary and secondary valencies of ferrous ion. (d) In the ligand has satisfied only the secondary valency of copper. Which of the following is considered as an anticancer species. [CBSE PMT 2004] (a) (b) (c) (d) An aqueous solution of on addition of excess of concentrated HCl turns blue due to formation of [AIIMS 2005] (a) (b) (c) (d) The correct order for the wavelength of absorption in the visible region is [AIIMS 2005] (a) (b) (c) (d) In which of the following pairs both the complexes show optical isomerism [AIIMS 2005] (a) cis-, cis- (b) , cis- (c) , (d) , cis- Which of the following compounds shows optical isomerism [AIEEE 2005; CBSE PMT 2005] (a) (b) (c) (d) 1. (b) Its coordination number will be 6 because it is bonded with three bidentale ligands. Oxi. No. of in is 2. (b) e.g. etc. 3. (a) On using one lit. solution, we will get 0.01 mole y and 0.01 mole z. 4. (b) is the organometallic compound which has ( and ( bonds present. 5. (b) is valency and 4 is C.N. of Ni. 6. (b) Co-ordination number is equal to total number of ligands in a complex. 7. (c) 8. (c) Because it is a polydentate ligand which binds the central atom nickel forming a ring like structure. 9. (d) 10. (a) . 11. (d) Potassium ferrocynide will ionize as ⇌ So, it will give five ions in solution. 12. (d) Complex ion Hybridization of central atom (inner) (inner) (inner) (outer) 13. (d) shows geomerical as well as optical isomerism. 14. (a) 15. (d) 16. (d) Ethylenediamine tetraacetate ion (EDTA) They have six donor atoms. poly dentate ligands have flexidentate character. It is not necessary that all the donor atoms present in the polydentate ligands should form co-ordinate bonds with central metal atom or ion. 17. (a,d) In the ligand are negative which is present in coordination spheres shows a dual behaviour. It may satisfied both primary & secondary valencies while neutral ligand satisfied only secondary valencies. 18. (a) Cis Isomer of is used as an anticancer drugs for treating several type of malignant tumours. When it is injected into the blood stream the more reactive groups are lost so the atom bonds to a atom in guanosine (a part of DNA) This molecule can bond to two different guanosine units & by bridging between them it upsets the normal reproduction of DNA. 19. (c) CoCl2 is a weak Lewis acid, reacting with chloride ion to produce salt containing the tetrahedral [CoCl4]2– ion. CoCl2 is blue when anhydrous, and a deep magneta colour when hydrated, for this reason it is widely used as an indicator for water. 20. (a) The absorption of energy or the observation of colour in a complex transition compound depends on the charge of the metal ion and the nature of the ligands attached. The same metal ion with different ligands shows different absorption depending upon the type of ligand. The presence of weak field ligands make the central metal ion to absorb low energies i.e., of higher wavelength. The field strength of ligands can be obtained from spectrochemical series. i.e. (weak field) I– < Br– < S2– < Cl– < NO3– < F– < OH– < H2O < NH3 < NO2– < CN– < CO (strong field) 21. (b) [Co(en)3]Cl3 cis-[Co(en)2Cl2]Cl 22. (c) CO-ORDINATION COMPOUNDS Mrs. SHALLU JINDAL AGGARWAL : (M)9878608983 –3 Cr OX OX OX –3 OX OX OX Cr Co en en + Cl Cl Cl Co en en Cl + mirror Co en en en l-form 3+ mirror Co d-form Co en en en 3+ M = O– – C O CH2 | | O– – C = O CH2 — CH2 — CH2 — N | | H2C = C – O– O O = C – O– CH2 N Mirror Cl Cl en en CO Cl Cl en en CO NH3 Cl Br H3N NH3 Trans NH3 CO NH3 Br Cl H3N H3N NH3 cis CO Br Br H3N H3N NH3 Trans NH3 CO Br Br H3N H3N NH3 cis NH3 CO