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Calculate the volume of carbon (IV) oxide that would be produced if 15g of calcium carbonate reacted with 100cm³ of 2.0M hydrochloric acid (C = 12.0, O = 16.0, Ca = 40.0) molar gas volume = 24000cm³
Date posted:
March 28, 2019
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When lead (II) Carbonate is reacted with dilute sulphuric (VI) acid, the reaction takes place for a short time and then stops. Explain.
Date posted:
March 28, 2019
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Name the particles responsible for the electrical conductivity of:
(a) Graphite
(b) Magnesium Sulphate solution
Date posted:
March 28, 2019
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Outline the causes of High Fertility Rate in Kenya.
Date posted:
March 28, 2019
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Outline the problems Facing transport and Communication in Africa and their Possible Solutions.
Date posted:
March 28, 2019
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Role of Transport and Communication in the Economic Development of Africa
Date posted:
March 28, 2019
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Give reasons why there are few Railway links among African Countries.
Date posted:
March 28, 2019
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It is advisable to leave your flame in the luminous state when not in use. Give a reason why.
Date posted:
March 28, 2019
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Discuss the various modes of transport.
Date posted:
March 28, 2019
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The diagram below shows a non-luminous flame. Use it to answer the questions that follow:
Two wooden splints were placed across regions X and Y respectively. Draw labelled diagrams to show the effects observed on the wooden splint placed across each region.
(i) Region X.
(ii) Region Y.
Date posted:
March 28, 2019
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Factors influencing Transport and Communication
Date posted:
March 28, 2019
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State the advantages of using farm tools.
Date posted:
March 28, 2019
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Give the characteristics of Cottage Industry in India in comparison with Kenya
Date posted:
March 28, 2019
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Explain the problems facing industrialization in Kenya and give possible solutions.
Date posted:
March 28, 2019
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What is primary cultivation?
Date posted:
March 28, 2019
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What is secondary cultivation?
Date posted:
March 28, 2019
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Give examples of cottage industries.
Date posted:
March 28, 2019
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280cm³ of nitrogen gas diffuse through a porous plug in 70 seconds. How long will it take 400cm³ of carbon (IV) oxide gas to diffuse through the same porous plug. (C = 12, O = 16, N = 7).
Date posted:
March 28, 2019
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In an experiment, a jar containing sulphur (IV) oxide was inverted over another jar containing hydrogen sulphide gas.
(a) State and explain the observation that was made.
(b) State two conditions necessary for the reaction to take place.
(c) Write an equation for the reaction
(d) What is the role of sulphur (IV) oxide in the reaction
Date posted:
March 28, 2019
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The diagram below represents a set-up used to prepare oxygen gas.
(a) Name substance Q.
(b) Complete the set-up to show how oxygen gas is collected.
(c) Write the equation for the reaction that occur.
Date posted:
March 28, 2019
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Describe briefly how potassium sulphate can be prepared using 50cm³ of 1M potassium hydroxide.
Date posted:
March 28, 2019
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Radioactive polonium – 216 decay as shown below.
Find the value of M and n.
Date posted:
March 28, 2019
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A farmer is to apply a compound fertilizer 20:30:10 on a vegetable plot measuring 5 metres long by 4 metres wide, at the rate of 200kg per hectare.
a) Calculate the amount of the fertilizer the farmer would require for the plot.
b) What do the figures 20, 30 and 10 in the fertilizer stand for?
Date posted:
March 28, 2019
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The flow chart below gives some reactions starting with ethane. Study it and answer the questions that follow.
(a) Draw the structure of compounds:
P:
Q:
(b) Write the name of Compound R.
Date posted:
March 28, 2019
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Explain how the inter-tropical convergence zone affects the weather pattern of East Africa.
Date posted:
March 28, 2019
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The apparatus below was used to separate a mixture of liquid A and B.
(i) State two properties of the liquids that make it possible to separate them are using such apparatus.
(ii) Give the name of the above apparatus.
Date posted:
March 28, 2019
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Two samples of equal volumes of water were put in 250cm³ beaker and heated for 10 minutes. Sample 1 registered a higher temperature than sample 2.
State the conditions under which flame I is produced in Bunsen burner.
Date posted:
March 28, 2019
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A patient was given tablets with prescription 2 x 3 on the envelope. Clearly outline how the patient should take the tablets.
Date posted:
March 28, 2019
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Study the following reaction scheme for the extraction of zinc metal and then answer the questions that follow.
(a) Name two chief ores from which zinc can be extracted
(b) (i) Name the reducing agents used in the reduction chamber.
(ii) Write the equations for the reduction process to obtain zinc
(c) Identify the following:
Solid K
Liquid L
Date posted:
March 28, 2019
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The table below gives reduction potentials obtained when the half – cells for each of the metals represented by letters,V,W,X, Y and Z were connected to a copper half – cell as the reference electrode.
(a) What is metal X likely to be? Give a reason.
(b) Which of the metals cannot be displaced from the solution of its salt by any other metals in the Table? Give a reason.
Date posted:
March 28, 2019