1. When 0.1 mol CoCl3(NH3)5 is combined with excess AgNO3, then 0.2 mol AgCl is obtained. The conductivity of the solution suits the 1:3 electrolyte 1:1 electrolyte 3:1 electrolyte 1:2 electrolyte Answer: (d) 2. A chelating agent has two or more than two donor atoms to bind to a single metal ion. Which of the following is not a chelating agent? Thiosulphato Oxalato Glycinato Ethane-1,2-diamine Answer: (a) 3. IUPAC name of [Pt(NH3)2Cl(NO2)] is Platinum diamminechloronitrite Chloronitrito-N-ammineplatinum (II) Diamminechloridonitrito-N-platinum (II) Diamminechloronitrito-N-plantinate (II) Answer: (c) 4. In the complex [E(en)2(C2O4)]NO2 (where (en) is ethylenediamine) _______are the coordination number and the oxidation state of the element ‘E’ respectively. 6 and 2 2 and 2 4 and 3 6 and 3 Answer: (d) 5. The sum of coordination number and oxidation number of the metal M in the complex [M(en)2(C2O4)]Cl (where (en) is ethylenediamine) is 9 6 7 8 Answer: (a) 6. Some salts containing two different metallic elements give test for only one of them in solution, such salts are double salts normal salts complex salts None of these Answer: (c) 7. An example of a sigma bonded organometallic compound is Grignard reagent Ferrocene Cobaltocene Ruthenocene Answer: (a) 8. Iron carbonyl, Fe(CO)5 is Tetranuclear Mononuclear Dinuclear Trinuclear Answer: (b) 9. The type of isomerism shown by the complex [CoCl2(en)2] is Geometrical isomerism Coordination isomerism Linkage isomerism Ionization isomerism Answer: (a) 10. Which of the following elements do not form a complex with EDTA? Ca Mg Be Sr Answer: (c)

 The compounds in which the central atom or group of atoms is surrounded by anions or neutral molecules called ligands are known as coordination compounds. In the coordination compounds, the central group acts as Lewis acid. The ligands are electron-pair donors and function as the Lewis base. The branch of chemistry under which properties of such compounds are studied is called the coordination chemistry. There is no sharp dividing line between the covalent, coordination and ionic compounds.