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The figure below shows part of micrometer screw gauge with 50 divisions on the thimble scale. Complete the diagram to show a reading of 5.73mm.
Date posted:
September 10, 2019
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The figure below shows a measuring cylinder,which contains water initially at level A. A solid of mass 0.32g is immersed in the water,the level rises to B.
Determine the density of the solid. (Give your answer to 3 significant figures).
Date posted:
September 10, 2019
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Give a reason why the formula mass of NO2 is sometimes 92 instead of 46.
Date posted:
September 10, 2019
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Which one of the following would correctly describe the net realizable value of a two year old asset?
A. The original cost of the asset less two years' depreciation
B. The amount that could be obtained from selling the asset, less any costs of disposal
C. The cost of an equivalent new asset less two years' depreciation The present value of the future cash flows obtainable from continuing to use the asset
Date posted:
September 10, 2019
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Show by shading the unwanted region, the region which satisfies the following inequalities
(b) calculate the area of this region in a square units
Date posted:
September 10, 2019
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Consider the chromatogram below.
A piece of chromatogram paper was spotted with colour inks obtained from pens labeled A to F. The diagram above shows the spots after the chromatograph was developed.
(a) Which two pens contained the same pigment?
(b) According to the chromatogram which pigments are present in the inks of the pen number F
(c) Describe how one could get a sample of yellow pigment
Date posted:
September 10, 2019
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The tube of a CRO is coated with graphite. State three functions of the graphite coating
Date posted:
September 10, 2019
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Five towns V,W,X,UY and Z are situated such that W is 200km east of V. X is 300km from W on a bearing of 150o. Y is 350km on a bearing of 240o from X. Z is 150o from V but 200o from X.
Draw the diagram representing the position of the towns. ( use a scale of 1cm to represent 50km) .
(b) From the diagram determine
(i) the distance in km of V from Z
(ii) The bearing of Y from W
(c) A plane heading to town X takes off from town y and flies upwards of a constant angle which
is less than 90o. After flying a distance of 350km in the air it sees town x at an angle of depression of 50o. Calculate the distance of the plane from x at this point to the nearest km.
Date posted:
September 10, 2019
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Distinguish between cathode rays and light rays.
Date posted:
September 10, 2019
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The figure below show the displacement time graph of a wave traveling at 400cm/s.
Determine for the wave the:
(i) Amplitude
(ii) Period
(iii) Frequency
(iv) Wavelength
Date posted:
September 10, 2019
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Using compass and ruler only construct a triangle Arc such that AB= 6cm ,BC = 5cm and angle ABC = 67.5o, measure the length of AC
Date posted:
September 10, 2019
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Hydrazine gas, shown below, burns in oxygen to form nitrogen gas and steam.
(a) Write an equation for the reaction
(b) Using the bond energies given below, calculate the enthalpy change for the reaction in (a) above
Date posted:
September 10, 2019
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A student expanded ( x + y)2 incorrectly as x2+ y2. Calculate the percentage error in the answer if x = 4 and y = 6
Date posted:
September 10, 2019
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A fruit juice dealer sell the juice in packet of 300ml, 500ml and 750ml. find the size of the smallest
container that can fill each of the packets and leave a remainder of 200ml
Date posted:
September 10, 2019
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A mason uses a six wheel pulley system to raise a weight of 250N through a vertical height of 2.5m using the machine.If the mason pulls using an effort of 500N. Calculate:
i) The velocity ratio of the pulley system.
ii) The work done by the mason.
iii) The useful work done by the pulley system.
iv) The efficiency of the system
Date posted:
September 10, 2019
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The figure below shows a block of mass 50g and density 2000kg/m3 submerged in a certain liquid and suspended from uniform horizontal beam by means of a string. A mass of 40g suspended from the other end of the beam puts the system in equilibrium
(i) Determine the up-thrust force acting on the block.
(ii) Calculate the density of the liquid.
(iii) Calculate the new balance point of the 50g mass (the 40g mass remains fixed) if the liquid was replace with one whose density was 1500kg/m3.
Date posted:
September 10, 2019
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A bullet moving at a velocity of 350m/s hits a tree trunk of diameter 70cm. It emerge from the opposite side with a velocity of 180m/s. Determine the average deceleration of the bullet in the trunk.
Date posted:
September 10, 2019
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Complete the sentences below with the correct form of the adjectives in brackets.
(i) This answer is.....................than the 1st one. (obscure)
(ii) Not all pre-historic places in Kenya are the same; Kamandusi is .................... (unique).
Date posted:
September 10, 2019
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The figure below shows an arrangement to demonstrate diffusion through solids.
The hydrogen gas is supplied for sometimes then stopped and the beaker removed. State and explain what is likely t be observed when the hydrogen gas supply is stopped.
Date posted:
September 10, 2019
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A form one class carried out an experiment to determine the active part of air. The diagram below shows the set-up of the experiment and also the observation made.
(a) Identify substance M
(b) State two reasons for the suitability of substance M for this experiment
(c) Write the equation for the reaction of substance M and the active part of air
Date posted:
September 10, 2019
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Complete the following sentences using the most appropriate preposition.
i. The student’s idea was conceived ............haste.
ii. The thief was oblivious ............ the trap.
iii. The doctor died .............. Ebola.
iv. The teacher congratulated him.............. his graduation.
v. No other being can be compared ............. God.
vi. They disagreed.......... who should be chosen the prefect.
vii. The electorate want no one ............................... me.
viii. After a delicious lunch, they left........................................ the game park.
ix. I dropped that extra change .........................my mum's purse.
x. Lameck was somewhat susceptible ........................ flattery.
xi. There is still no cure ............ the common cold.
xii. I have not been revising ...................... last week.
xiii. The hotel is now open....... its customers from six to six.
xiv. They congratulated him ............... his good performance.
xv. The guest arrived and sat ............the host.
xvi. John spoke to his father....................phone.
xvii. The Moran was oblivious ..............danger.
xviii. The traveler was robbed ...........all his money.
xix. Early rising is beneficial..............health.
xx. It was thoughtful .............. her to apologize.
xxi. This year's candidates are very good ....... languages.
xxii. Give us information ................................................ your company.
xxiii. The police wanted proof ......................................... their explanation.
xxiv. Vegetables bought in the market are inferior ............those grown at home.
xxv. He was charged.............forging
xxix. The river flows ..............the bridge. under
xxx. His breath smelt ............... alcohol.
xxxi. She was living ............... her means.
xxxii. She sang her heart ...........
xxxiii. Some people are keen .............. working in a team.
xxxiv. Many office workers are fond.....................having frequent coffee breaks.
xxxv. The plane wasn’t allowed to take ..............because of the bad weather.
xxxvi. Muthama is quite blind.......................... his faults.
xxxvii. Power went off; we had to see _________________ the light of a tin lamp.
xxxviii. On Saturday, our football team won because the spectators cheered....................
xxxix. Jane has a special liking ..............Mathematics.
xl. The website has a name that answers ............... the name Toogie.
xli. It is improper to hurl abuses ....................people.
xlii. The accused was so confused that he was lost ................ words.
Date posted:
September 10, 2019
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Xcm3 of substance A which has density 800 kg/m3 is mixed with 1000cm3 of water with a density of 1000kg/m3. The density of the mixture is 960kg/m3. Determine the value of X
Date posted:
September 10, 2019
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Water at 200C falls over a waterfall of height 40m. Calculate the temperature of water at the bottom of the waterfall if 80% of potential energy at the top is converted into heat energy
Date posted:
September 10, 2019
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Draw a dot and cross diagram to show bonding in sulphur (IV) oxide
Date posted:
September 10, 2019
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Give one use of charcoal in the sugar refinery industry.
Date posted:
September 10, 2019
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Study the flow chart below and answer the questions that follow.
(a) Identify solid G
(b) Write a balanced chemical equation between the yellow solid and dilute nitric acid.
(c) Write the formula of the complex ion in solution F
Date posted:
September 10, 2019
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A school has two students whose age difference is 9. Twice the sum of their ages is equal to the age of their teacher.
(a) By letting the age of the younger student be y, write an expression of the:
(i) Age of the elder student.
(ii) Age of their teacher.
(b) If in 19 years time, the product of the ages of the two students is equal to 14 times the age of their teacher;
(i) Form an equation in y and hence determine the present possible age of the younger student.
(ii) Determine the possible age of the elder student in 19 years time.
(iii) Find the possible age of the teacher.
Date posted:
September 10, 2019
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The diagram below shows a set-up of apparatus that can be used to prepare nitrogen (IV) oxide. Study it and use it to answer the questions that follow.
(i) Write the equation for the reaction that takes place in the boiling tube.
(ii) State the observations made in the boiling tube.
(iii) Explain why lead (II) nitrate is preferred over other metal nitrates in this experiment.
(iv) Describe how gas A can be identified.
(b) (i) Name liquid B
(ii) Write a chemical equation to show how liquid B is formed in this experiment.
(c) (i) In another experiment, excess aqueous lead (II) nitrate solution was reacted with a solution which contained 2.34g of sodium chloride. Calculate the mass of precipitate formed in this reaction. (Pb = 207, Cl = 35.5, Na = 23)
(ii) Write an ionic equation for the reaction that takes place when nitrogen (IV) oxide reacts with aqueous sodium hydroxide.
Date posted:
September 10, 2019
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The flow chart below shows some processes in the extraction of zinc. Study it and answer the questions that follow.
(a) Name the processes represented by A and E.
(b) State the reagents required for processes B, C and D.
(c) Write a chemical equation of the reaction that occurs in process B.
(d) With an aid of a diagram, explain how you would obtain a pure sample of zinc by process E
(e) State two commercial uses of zinc metal.
Date posted:
September 10, 2019
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A fathometer produces sound in a ship and receives two echo‘s where there is a raised sea bank. One after 2.5 seconds and the other after 3.0 seconds. Find the height of the raised sea bank if the velocity of sound in water is 1460m/s.
Date posted:
September 10, 2019