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Briefly discuss any five of the elements of good citizenship.
Date posted:
May 21, 2019
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Discuss how the arrival and missionary activities in Kenya affected the African culture.
Date posted:
May 21, 2019
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Briefly explain the establishment of missionary activities in different parts of Kenya
Date posted:
May 21, 2019
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A volume of 80cm3 of a mixture of propane (C3H8) and oxygen were ignited in an experiment.The products were cooled and passed through an aqueous sodium hydroxide. The final volume
was reduced by 30cm3
a) Write the equation for the combustion of propane
b) Determine the volume of;
i) The component of the original mixture
ii) Residual oxygen
Date posted:
May 21, 2019
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Name some of the Eastern Cushitic communities in Kenya
Date posted:
May 21, 2019
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Highlight any seven positive impacts of the missionary work in Kenya.
Date posted:
May 21, 2019
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State and briefly explain any five social effects of the Indian ocean trade on the people of east Africa
Date posted:
May 21, 2019
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75g of a saturated solution contains 30g of salt calculate
a) The solubility of the salt
b) The percentage of the salt in the saturated solution
Date posted:
May 21, 2019
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Define the terms conflict and conflict resolution and briefly discuss the any five methods of solving conflicts in Kenya.
Date posted:
May 21, 2019
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Draw a dot (.) and cross (x) diagram to show bonding in:-
(i) Ammonium ion (NH4)
(ii) Silane (SiH4)
(N=14 H=1 Si=14)
Date posted:
May 21, 2019
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Explain why graphite conducts electricity while diamond does not.
Date posted:
May 21, 2019
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When 31.2g of hydrated. Aluminium oxide ( Al2O3XH2O) was heated to a constant
mass of 20.6g of Aluminium oxide ( Al2O3) was obtained. Determine the value of x in
hydrated oxide.(Al= 27.0, O=16.0, H=1.0)
Date posted:
May 21, 2019
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The flow chart below shows industrial extraction Aluminium metal. Study it and answer the questions that follow.
(i) Explain how process T is carried out.
(ii) Name residue P, give a reason.
(iii) Explain why it is necessary to heat Aluminium oxide in presence of cryolite before
electrolysis is carried out.
Date posted:
May 21, 2019
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Outline four features of direct production.
Date posted:
May 21, 2019
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Describe how sulphuric acid is manufactured from sulphur (VI) oxide.
Date posted:
May 21, 2019
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Enter each of the following transactions in the relevant ledger accounts
(a) Started business in June 15th 2014 with Ksh. 500,000 in bank.
(b) Bought a motor vehicle in June 16th 2014 for KSh. 250,000, payment made by a cheque.
(c) Withdrew Ksh. 50,000 in June 20th 2014 from the business bank a/c to be used in the office.
(d) June 24th, 2014, paid salaries Ksh. 18,000 cash.
Date posted:
May 21, 2019
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In the preparation of magnesium carbonate magnesium was burnt in air and the product collected.Dilute sulphuric acid was added and the mixture filtered and cooled. Sodium carbonate was added to the filtrate and the content filtered. The residue was washed and dried to give a white powder.
a) Give the chemical name of the product formed when magnesium burns in air
b) Write a chemical equation for the formation of product.
c) (i) Name filtrate collected after sodium carbonate was added
(ii) Name the white powder.
d) Write chemical equation for the reaction between product in (a) and acid.
e) Name the ions present in the filtrate after addition of sodium carbonate.
f) Write an ionic equation to show the formation of the white powder
g) Write an equation to show what happened when white powder is strongly heated.
Date posted:
May 21, 2019
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Filter paper dipped in acidified Potassium Manganate (VII) were placed in two
separate gas jars A and B containing pentane and Pent-l-ene respectively. Explain
what was observed in each case.
Date posted:
May 21, 2019
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An aqueous solution of Copper (II) Sulphate was electrolysed using platinum electrodes. When a current was passed a gas that relights a glowing splint was produced.
(i) Name the electrode which acts as cathode. Give a reason.
(ii) Write an equation for the reaction at the anode.
d) 0.11g of metal R deposited by electrolysis when a current of 0.03 amperes flow for
99 minutes. ( R =92.) ,(1 Faraday = 96500 C)
(i) Find the number of moles of metal deposited.
(ii) Find the number of moles of electrons passed.
(iii) Determine the value of n in the metallic ion Rn+.
Date posted:
May 21, 2019
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Study the information below and answer the following questions. A mixture contains three
solid A,B and C. the solubility of these solids in different liquids is as shown below
Explain how you will obtain sample C from the mixture.
Date posted:
May 21, 2019
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The peaks below show the mass spectrum of element X.
Calculate the relative atomic mass of X.
Date posted:
May 21, 2019
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The fig below shows a hydraulic press used to compress a bale
(i) Explain briefly ho a force applied on the lever compresses the bale.
(ii) Given that the area of piston B is 18cm2 and that of piston A 3.0cm3. A force of 2N is
applied to piston A, find the force produced on the larger piston B that compresses
the bale.
Date posted:
May 21, 2019
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Solutions can be classified as acids bases or neutral. The table below shows solutions and their pH values.
(i) Select any pair that would react to form a solution of pH 7
(ii) Identify two solutions that would react with Aluminium hydroxide. Explain.
Date posted:
May 21, 2019
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Sketch on he axes provided a graph to show how mass per unit volume of water varies with
temperature when water is heated from 00 to 200
Date posted:
May 21, 2019
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List the uses of the dictionary.
Date posted:
May 21, 2019
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D grams of potassium hydroxide were dissolved in distilled water to make 100cm3 of
solution. 50cm3 of the solution required 50cm3 of 2.0M nitric acid for complete neutralization.Calculate the mass D of potassium hydroxide.
(relative formula of KOH=56)
Date posted:
May 21, 2019
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Element A has atomic mass 23 and element B atomic mass 7 and also have 12 neutrons and 4 neutrons respectively.
a) Write the electron arrangement of A and B
b) Which element has higher ionization energy? Explain
Date posted:
May 21, 2019
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When hydrogen chloride gas is dissolved in water the solution formed turns blue litmus paper red but there is no effect on blue litmus paper when the gas is dissolved in carbon tetra chloride.Explain
Date posted:
May 21, 2019
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A box of mass 500g is dragged along a level ground at a speed of 12m/s. if the force of friction
between the box and the floor is 2000N, calculate the power developed.
Date posted:
May 21, 2019
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The figure shows the velocity time graph of two identical spheres released from the surfaces of
two liquids A and B.
Give a reason why the terminal velocity of the sphere In B is higher than in A.
Date posted:
May 21, 2019