-
Identify the type of muscle in human being where formation and effect of lactic acid is not felt.
Date posted:
September 18, 2019
-
In an experiment to investigate a product of photosynthesis, the set up was as shown in the diagram below. The apparatus was placed in the sun.
a) State the confirmation test for gas Y
b) Explain why Elodea is the most suitable plant for this experiment.
c) State the functions of the sodium hydrogen carbonate in the experiment.
Date posted:
September 18, 2019
-
A student added equal amounts of blood to equal volumes of salt of different concentrations. She observed and counted the red blood cells at the beginning of the experiment and at end of the experiment. The results were as shown :
Account for the results in :
a) Set up A
b) Set up B
Date posted:
September 18, 2019
-
Study the flow diagram showing the role of the pancreas in controlling blood glucose concentration;
i) Name the endocrine tissue labelled A.
ii) Name the hormone B produced by a cells.
iii) Name the hormone C produced by the B cells.
iv) Name the process represented by the dotted lines.
v) Briefly describe how hormone B brings about a rise in blood glucose concentration when it reaches
the liner.
Date posted:
September 18, 2019
-
Taja baadhi ya maudhui yanayojitokeza katika hadithi ya tumbo lisiloshiba?
Date posted:
September 18, 2019
-
Taja mifano ya taswira katika hadithi ya tumbo lisiloshiba?
Date posted:
September 18, 2019
-
a)(i) Taking the radius of the earth, R= 6370km and π = 22/7, calculate the shortest distance between
the two cities P(60oN, 29oW) and Q(60oN, 31oE) along the parallel of latitude.
(ii) If it is 1200hrs at P, what is the local time at Q
(b)An aeroplane flew due south from a point A (60oN, 45oE) to a point B. the distance covered by
the aeroplane was 800km. determine the position of B.
Date posted:
September 18, 2019
-
The diagram below shows a circle ABCDE. The line FEG is a tangent to the circle at point E. Line DE is parallel to CG, ∠DEC = 28o and ∠AEG = 32o.
Calculate:
(a) ∠AEG
(b) ∠ABC
Date posted:
September 18, 2019
-
The expression 1 + x/2 is taken as an approximation for √1 + x. Find the percentage error in doing so if x = 0.44.
Date posted:
September 18, 2019
-
The diagram below represents a set up that was used for electrolysis of aqueous copper (II) nitrate.
A gas that relights a glowing splint was produced at electrode A.
i) Which electrode is the cathode ? Explain.
ii) State another suitable method for collecting gas X.
iii) Write ionic equations to show reactions that take place at the :
Anode
Cathode
iv) Explain how the identity of the product at the cathode of this electrolysis can be confirmed.
v) Calculate the mass of copper deposited if a constant current of 5 A was passed for 3 hours. (Cu = 63.5, IF = 965000)
Date posted:
September 18, 2019
-
Identify four differences between full-flow and By-pass filters.
Date posted:
September 18, 2019
-
The figure below shows an isometric drawing of a machine component. Draw FULL SIZE, in first projection the following views in the drawing paper provided.
a) Sectional front elevation B-B .
b) The plan.
c) Include 3 important dimensions.
Do not show hidden details
Date posted:
September 18, 2019
-
Identify two advantages of a pressurized water cooling system over thermo-siphon cooling system.
Date posted:
September 18, 2019
-
Give two reasons why bearings are necessary.
Date posted:
September 18, 2019
-
Excess concentrated sulphuric VI acid was mixed with pieces of dry wood as shown.
a) State the observation made in the tube.
b) When the reaction was complete, the mixture was heated gently, then strongly and set up adjusted as shown below.
State and explain the observation made on acidified potassium chromate VI solution.
Date posted:
September 18, 2019
-
State two reasons for alloying metals.
Date posted:
September 18, 2019
-
Differentiate between live and dead axle.
Date posted:
September 18, 2019
-
The diagram below represents the process that brings about blood clotting.
a) Name the substances A and B.
b) Name one source of calcium ions in the diet.
c) Name one more other role of calcium in the body.
d) Name the blood cells that are involved in blood clotting.
e) List down three structural adaptations of the red blood cells to their functions.
Date posted:
September 18, 2019
-
Draw a line diagram of a national grid system showing typical voltages at each stage.
Date posted:
September 18, 2019
-
Use the nitrogen cycle below to answer the questions that follow.
a) Name the processes represented by
i) G
ii) Y
iii) K
b) Name the group of organisms that cause processes
i) C
ii) J
iii) L
c) Name the state in which nitrogen exist in
i) Plant tissue
ii) Atmosphere
Date posted:
September 18, 2019
-
The table below shows properties of some chlorides. Study it and answer the questions that follow.
a) Explain the high melting and boiling points of sodium chloride.
b) Write an equation for the reaction between PC15 and water.
c) Draw the dot (•) and cross (x) diagram to show bonding in NaCl.
Date posted:
September 18, 2019
-
Give three reasons why a verification of polarity test is carried out in a completed domestic installation.
Date posted:
September 18, 2019
-
List three metal parts that are exempted from earthing in a domestic installation.
Date posted:
September 18, 2019
-
The labels of two reagent bottles contained the following safety symbols.
a) What do the symbols mean ? Explain.
b) Which of the reagent is more harmful ?
Date posted:
September 18, 2019
-
Name the logic gate shown in figure 3 below.
Figure 3
Name.............
Date posted:
September 18, 2019
-
What volume of oxygen gas at r.t.p will be liberated at the anode when a current of 3 amperes is passed through magnesium sulphate solution for 45 minutes and 30 seconds. (Molar gas volume at r.t.p = 24000cm3, Faraday constant = 96500
Coulombs)
Date posted:
September 18, 2019
-
When bismuth III Chloride is added to water, a reaction occurs and a white precipitate forms as shown below.
BiCI3(aq) + H20(l) BiOCl(s) + 2HCl(aq)
What would be the effect on the amount of the precipitate formed if sodium hydroxide solution is added to the equilibrium mixture ? Explain your answer.
Date posted:
September 18, 2019
-
Explain why iron nails rust faster in sodium chloride solution than in tap water.
Date posted:
September 18, 2019
-
List two power company equipment and two consumer’s equipment found at a domestic consumer’s intake point.
Date posted:
September 18, 2019
-
State the role of Directorate of Industrial Training.
Date posted:
September 18, 2019