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Giving a reason, state what would be observed if concentrated hydrochloric acid is added
drop wise to a solution of Bismuth chloride.
Date posted:
September 28, 2017
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Name the following processes
i) When anhydrous calcium chloride was left in an open beaker
overnight a solution was formed.
ii) When sodium carbonate decahydrate crystals are left in an open beaker for some days it turned
into powder.
Date posted:
September 28, 2017
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Briefly explain how the calcium is separated from sodium in the down’s cell.
Date posted:
September 28, 2017
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List the main uses of Sulphur
Date posted:
September 27, 2017
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List and explain the physical properties of Sulphur
Date posted:
September 27, 2017
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Name the two allotropes of sulphur
Date posted:
September 26, 2017
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State three uses of hydrogen nitrate
Date posted:
September 26, 2017
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Define the term catenation?
Date posted:
September 26, 2017
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Both graphite and molten sodium chloride conduct electricity,state how each of the substances conduct electricity?
Date posted:
September 26, 2017
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List five substances that undergo sublimation?
Date posted:
September 26, 2017
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Define the term sublimation
Date posted:
September 26, 2017
-
Define the term chromatography?
Date posted:
September 26, 2017
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Name three methods used in separation of mixtures?
Date posted:
September 26, 2017
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What is a conductor?
Date posted:
September 26, 2017
-
Define the term flame?
Date posted:
September 26, 2017
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An experiment was carried out to investigate the rate of reaction shown below
Sucrose →Fructose + Glucose
For the products fructose and glucose to be formed, it was found that substance K was to be added and the temperature maintained at 370C. When another substance L was added, the reaction slowed down and eventually stopped
a) Suggest the identify of substances K and L
b) Other than temperature state three ways by which the rate of reaction could be increased
c) Explain how substance L slowed down the reaction
Date posted:
September 25, 2017
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Write an equation for the reaction that takes place when equal volumes of chlorine gas react with propane
Date posted:
September 25, 2017
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Gas Q takes 100 seconds to diffuse through a porous pot. Gas Q has a relative molecular mass of 34. Determine how long it will take sulphur (IV) oxide gas to diffuse under the same condition? (S = 32, O = 16,)
Date posted:
September 25, 2017
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What is meant by hard water?
Date posted:
September 25, 2017
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Briefly describe what happens when solids are heated
Date posted:
September 24, 2017
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Explain the Kinetic Particle Theory
Date posted:
September 24, 2017
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State uses of water in frasch process
Date posted:
September 24, 2017
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Why is a glass container for sampling and storage inappropriate
Date posted:
September 20, 2017
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State two chemical tests for the presence of water
Date posted:
September 19, 2017
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What is oxidation agent?
Date posted:
September 19, 2017
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What is oxidation?
Date posted:
September 19, 2017
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State two applications of radioactivity in medicine.
Date posted:
September 19, 2017
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Explain why calcium Oxide is not used to dry hydrogen chloride gas.
Date posted:
September 19, 2017
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Sulphur is extracted from underground deposits by frasch process. State two physical properties of Sulphur that makes it possible to be extracted through this process.
Date posted:
September 19, 2017
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Name a suitable drying agent for hydrogen chloride gas
Date posted:
September 19, 2017