ANSWER ALL QUESTIONS SECTION A :

OBJECTIVES

1. If 10cm3 of hydrogen gas were sparked with 20cm3 of oxygen. Calculate the volume of residual gas after cooling. a. 25cm3 of O2. b. 5cm3 of O2 c.15cm3 of O2. d.10cm3
2. These are adverse effects of chemistry except a. pollution b. population. c. corrosion d. drug abuse
3.The addition of water to calcium oxide is a a. physical change b. chemical change c. formation of mixture d. endothermic reaction
4. 'All pure samples of a particular chemical compound contain similar elements combined in the same proportion by mass' This is the law of a. conservation of mass b. definite proportion c. multiple proportion d. partial pressure
5. Which of these is odd? a. diamond. b. graphite c. bronze d. coal
6. The ability of an element to exist in two or more physical states but maintaining the same chemical characteristics is calleda. isotopy b. isomerism c. allotropy d. buffer
7. Kipp's apparatus is an equipment for preparing intermittent supply of gases by reacting a. liquid and gas b. Liquid with solid c. solid with gas d. liquid with liquid
8.Producer gas has a low heating power because it contains morea. carbon dioxide than oxygen b. nitrogen than carbon monoxide c. hydrogen than oxygen d. nitrogen than hydrogen
9. Temporary hardness of water is caused bya. CaCO3 b. Na2CO3. c. Ca(HCO3)2 d. coal tar
10.The choice of fractional distillation as a separation techniques is based on closeof constituents. a. density. b. melting point c. solubility d. moiling point

SUBJECTIVE

1.The PH of a 0.005m hydrogen tetraoxosulphate vi acid is
2.Potash alum KAl(SO4)2.12H2O is an example of salt
3. A method that can separate solvent from its solution is
4. When a gaseous substance transforms directly into solid state the process is called
5. The aqueous liquid released as one of the products of destructive distillation of coal
6. The crystalline structure of graphite is in shape
7. The solid form of carbon (IV)oxide is called
8.When carbon (IV) oxide is bubbled into slaked lime the solution turns
9.The petroleum fraction used in surfacing of road is
10. Incomplete combustion in engines is a major sources of