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Chemistry Form Four Term Two Question Paper

Chemistry Form Four Term Two

Course:Secondary Level

Exam Year:2012

1. Which solvent is the most suitable for removing the plant extract stain from a piece of clothes? Explain
2. An anti-acid tablet that neutralizer excess acid in the stomach contains magnesium hydroxide. Write the chemical equation for the neutralization reaction
3. Explain why the pain is relieved faster when the tablet is chewed than when it swallowed whole
4. Define the term solubility
5. The solubility of Y is 4 0g per 100g of water at 60 degrees c and 48g per 100g of water at 100oc. How much salt Y would saturate 190g of water at 100oc
6. A gas Y has the following characteristics. Very dense air, very soluble in water, turns see litmus paper blue, has a pungent smell, colourless
suggest the identity of gas Y
7. Draw a diagram showing how you would collect a fro sample of gas Y
8. Carbon (iv) oxide and silicon (iv)oxide are oxides of elements in same group in the periodic table, in terms of structure and bonding explain why silicon(iv)oxide is a solid at room temperature while carbon (iv)oxide is a gas.
9. State any two factors that effect the equilibrium of a reaction
10. Explain why hydrogen can be placed in either group 1 of group vii of periodic table
11. Explain why helium is prefered to hydrogen in air balloons

Chemistry Form Four Term Two Question Paper

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