Hydrogen and Following Complexes I.

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MAJENGO SECONDARY SCHOOL
CHEMISTRY TEST FORM VI JULY 2013
TIME: 2 HOURS

SECTION A
Answer all questions 1. a) A coordination compound has a formula Co Cl3. 4NH3. It does not liberate ammonia but precipitates one mole of chloride ions with Ag No3. i. Give IUPAC name of the complex ii. Write it’s structural formula a) Give chemical tests to distinguish [Co Br (NH3) 5] S04 and [Co (NH3)5 SO4] Br 2. Give IVPAC Names of the following i. K2 [ptF6] ii. [Co (NH3)5 (ONO)] CL2 iii. K3 [Co NO2)6] iv. [Cr (en)3 ] CL3 3. Write down the structures of the following Complexes i. Hexamine chromium (III) hexacyano cobaltate (III) ii. Triammine chloroplatinium (II) ammine trichloro palatinate (II) iii. Tris (ethylenediamine) chromium (III) hexacyano cobaltate (III) iv. Potassium Hexacyano ferrate (II) 4. Describe the type of complex and hybridization of the following complexes i. [ Co F6]3- ii. [Cu (NH3) 4]2+ 5. a) The Complex Compounds [ Co (CN) 6 ] 3- and [Co (NH3)6 ]2+ have different colours explain 6. give an example of each of the following i. Neutral complex ii. Cationic Complex iii. Anionic Complex iv. Hexadentate ligand

SECTION B 7. a) Giving reasons arrange the following isomeric alkanes in order of decreasing boiling points i. Pentane ii. 2, 2-dimethylpropane iii. 2-methylbutane a) How will you synthesize methane from acetic acid? b) A hydrocarbon C4H10 (A) on monochlorination gives a compound C4H9C1 (B). Compound (B) on treatment with sodium metal gives 2,2 ,3,3- tetramethylbutane. What are the structural formulas of (A) and (B)? 8. a) A hydrocarbon of formula C6H12 decolorises bromine solution, dissolves in concentrated sulphuric acid, yields 2-methylpentane on hydrogenation and on ozonolysis gives formaldehyde and 3- methylbutanal. What is the

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