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Ruth deposited sh20,000 in a fixed deposit account for a period of 1½ years. The bank pays compound interest on quarterly basis. At the end of this period her account had shs46,200. Determine the rate at which interest was paid per annum.
Date posted:
September 19, 2019
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The average of the first and fourth terms of a G.P is 140. Given that the first term is 64, find the common ratio.
Date posted:
September 19, 2019
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A ball is kicked vertically upwards from a point 0.5m above the ground at a velocity of 16m/s. Assuming that acceleration due to gravity is 10m/s2
Determine
a)An expression for its velocity t seconds later
b)An expression for its height above the ground t seconds later
c)The maximum height reached by the ball
Date posted:
September 19, 2019
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The diagram below shows the heating curve of a pure substance. Study it and answer the questions that follow.
(a) What are the physical states of the substances at points W and Y.
(b) Explain why the temperature remains constant between points B and C.
Date posted:
September 19, 2019
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Potassium manganate (VII) reacts with chloride salts to produce chlorine. Both chlorine and potassium manganate (VII) are strong oxidizing agents. Which one of the two is the stronger oxidizing agent? Explain your answer
Date posted:
September 19, 2019
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A two-digit number is made by combining any of the two digits 1, 3, 5, 7 and 9 at random.
a)Make an array of possible combinations
b)Find the probability that the number formed is prime
Date posted:
September 19, 2019
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When a grey powder P, which has no action on cold water is placed into a salt solution of Q, a brown solid R is deposited.
The blue solution of Q, fades giving way to a green solution.
a) Name the type of reaction that takes place.
b) Identify solids P and R
c) Write an equation for the reaction leading to formation of the brown solid.
Date posted:
September 19, 2019
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Grade x and grade y sugar cost sh60 and sh50 per kilogram respectively. In what proportion must the two grades be mixed to produce a blend that cost sh53 per kilogram
Date posted:
September 19, 2019
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A point T divides a line AB internally in the ratio 5:2. Given that A is (4,10) and B(11,3). Find the coordinates of T
Date posted:
September 19, 2019
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Methane gas reacts with chlorine gas as shown in the equation below.
Use the bond energies in the table below to calculate the enthalpy for the above reaction.
Date posted:
September 19, 2019
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The set- up below was used to investigate the rate of diffusion of different gases.
a) Explain why a coloured liquid is used in this experiment.
b) State and explain the observation made after 20 minutes.
Date posted:
September 19, 2019
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Use matrix method to determine the co-ordinates of the point of intersection of the two lines.
3x – 2y = 13, 2y + x + 1 = 0
Date posted:
September 19, 2019
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The table below gives information about some reactions of metals A,B, C and D and their rates.
Arrange the metals in order of decreasing activity.
Date posted:
September 19, 2019
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The diagram below shows the set-up that can be used to prepare and collect oxygen gas. Study it and answer the questions that follow.
Identify two mistakes from the diagram which must be corrected for one to collect dry oxygen gas.
Date posted:
September 19, 2019
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State the conditions under which ammonia gives the following products when heated
(i) Nitrogen and hydrogen.
(ii) Nitrogen and water.
(iii) Nitrogen (II) oxide and water.
Date posted:
September 19, 2019
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The following diagram was used to study a property of hydrogen gas. Study it and answer the questions that follow.
a) Name the missing condition in the above set up.
b) Explain why the combustion tube is clamped in a slanting position.
c) Before lighting the gas at the end of delivery tube, hydrogen must be let to pass through until all the air is driven out. Explain.
d) State three observations that occur in the combustion tube.
e) Why was hydrogen gas burnt at point Z.
f) Why should the supply of hydrogen gas be continued while the apparatus cool.
g) What would be observed if the experiment was repeated using lead (II) oxide.
h) Other than the property investigated above, name two other chemical properties of hydrogen gas.
Date posted:
September 19, 2019
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Calculate the mass of sodium carbonate contained in 200cm3 of 0.02M sodium carbonate solution.
Date posted:
September 19, 2019
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A sample of 10cm3 of hydrogen sulphide was burned in 40cm3 of oxygen. Calculate the volume and composition of residual gas (assume all volumes are measured at s.t.p)
Date posted:
September 19, 2019
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A mixture of sand, cement and ballast is in the ratio 5:1:3. If the cost of 7 tonnes of sand is Sh 3000,
5 tonnes of cement sh 50,000 and 8 tonnes of ballast Sh 4000, find the cost of 7tonnes of the mixture.
Date posted:
September 18, 2019
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The price of a new car is Shs. 800,000. If it depreciates at a constant rate to Shs 550,000 within 4 years, find the annual rate of depreciation.
Date posted:
September 18, 2019
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A quantity y varies partly as the square of x, and partly as x. When y = 20 x = 2 and when y =36, x = 3.
Find the equation showing the relationship between x and y.
Date posted:
September 18, 2019
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During a Practical study students made measurements on a fish and found out that its body length from the tip of the mouth to the tail tip was 30cm and the length from the tail tip to the anus was 12cm. Use this information to calculate the tail power of the fish.
Date posted:
September 18, 2019
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What is meant by tail power ?
Date posted:
September 18, 2019
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Calculate the shortest distance in nautical miles between M(45°N, 38°E) and N(45°N,42°W)
Date posted:
September 18, 2019
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A man deposits his money in a savings bank on a monthly basis. Each deposits exceeds the previous one by Shs 500. If he started by depositing Shs 1500, how much will he have deposited in 12 months?
Date posted:
September 18, 2019
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Triangle OPQ is such that OP = p and OQ = q point R divides OP in the ratio 1:3 and a point S
divided PQ in the ratio 5:2 OS and RQ meet at T.
a) Express OS and QR in term of p an q.
b) Given that OT = KOS. Express OT in terms of K, p and q
c) (i) Given also that RT = h RQ, express OT interms of h , p and q
(ii) find the value of h and k
d) State the ratio in which Q divided RT.
Date posted:
September 18, 2019
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The diagram below shows a cross-section through a pistil.
a) Name the structures labelled K, L and M
b) What do the following parts develop into after fertilization.
i) Part M
ii) Part L
iii) Part N
Date posted:
September 18, 2019
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Wafula was asked to round off 2/3 to 2 decimal places but he truncated it to 3 decimal places.
Determine the percentage error as a result of misunderstanding of the question
Date posted:
September 18, 2019
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An experiment was set up as shown below.
a) A student blew air in and out through point X. Using arrows, indicate on the diagram how air gets in and out of the setup.
b) i) In which of the test tube would lime water forms white precipitate first.
ii) Give a reason
Date posted:
September 18, 2019
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Find without using mathematical tables or calculator, the value of x which satisfy the equation.
Log2 (x2 – 9) = 3 log2 2 +1
Date posted:
September 18, 2019