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Highlight four functions of an internet service provider (ISP)
Date posted:
May 14, 2019
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Distinguish between synchronous and asynchronous data transmission modes.
Date posted:
May 14, 2019
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(i) Define the term "network firewall
(ii) Describe three advantages and three disadvantages of adopting hardware firewall.
Date posted:
May 14, 2019
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Explain three modes of data communication and their practical use.
Date posted:
May 14, 2019
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Explain four security concerns that personal computer users face in an organization.
Date posted:
May 14, 2019
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List seven application packages of a computer system.
Date posted:
May 14, 2019
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Briefly explain five features of a spreadsheet package.
Date posted:
May 14, 2019
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Outline circumstances where open tendering is not appropriate
Date posted:
May 14, 2019
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The table below shows the atomic numbers of some elements represented by letter J to Q ( letters
not their actual symbols). Study and answer the questions that follow.
a) Write the electronic configuration of
(i) M
(ii) P2+
b) Write the formula of the compound formed when L combines with N
c) How would reactivities of element N and P with chlorine compare? Explain.
d) Element N combines with oxygen to from an oxide. Using dots (.) and crosses(x) to
represent the outermost electrons, show how the two elements combine.
e) Select the most reactive metal and non-metal and give reason for your answer.
f) State one physical and one chemical property that elements J and Q have in common
g) What name is given to the group of elements to which element M belong?
h) (i) Element K consists of two isotopes with relative abundances 75% and 25% and
mass number 35 and 37 respectively find the relative atomic mass of K.
(ii) Why is the relative atomic mass of K not a whole number?
Date posted:
May 13, 2019
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The diagram below shows a Bunsen burner when in use
Which of the labeled parts is used for heating? Give a reason
Date posted:
May 13, 2019
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Identify five types of file extensions.
Date posted:
May 13, 2019
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During the extraction of lead from its ores one of the main ore used is Galena
(i) Write an equation for the reaction in roasting furnace.
(ii) Name gas
(iii) State one use of lead metal.
Date posted:
May 13, 2019
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Describe how you would prepare crystals of sodium nitrate starting with 200cm3 of 2M
sodium hydroxide.
Date posted:
May 13, 2019
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The following table gives the melting points of oxides of elements in period 3. Study it and
answer the questions that follow:-
(i) Explain the difference in melting points of MgO and P4O10
(ii) Name the compound in the above table that will dissolve both in dilute
hydrochloride acid and dilute sodium hydroxide.
Date posted:
May 13, 2019
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The following diagram gives an overview of computer software:
Required:
Identify two examples of each of the following computer software’s:
i. General purpose application programs.
ii. Application specific programs.
iii. System management programs.
iv. Systems development programs.
Date posted:
May 13, 2019
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36cm3 of a solution of potassium hydroxide requires 25cm3 of 0.5M sulphuric acid to
neutralize it.Calculate the concentration of alkali in g/dm3
Date posted:
May 13, 2019
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(i) Briefly explain the term "machine level programming language".
(ii) State two advantages and three disadvantages of a machine level programming language.
Date posted:
May 13, 2019
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The diagram below represents set-up that can be used to prepare and collect oxygen gas
a) Name solid P
b) What property of oxygen makes it possible for its collection as indicated by the
diagram.
c) Explain why it is important not to collect any gas for the first few seconds of the
experiment.
Date posted:
May 13, 2019
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Discuss the factors that determine the processing power of a computer.
Date posted:
May 13, 2019
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Describe the following characteristics of computer "memory
i. Mutability
ii. Accessibility
iii. Addressability
iv. Volatility
Date posted:
May 13, 2019
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During the electrolysis of dilute sulphuric (VI) acid the volume of hydrogen gas collected is twice
the volume of oxygen gas. Using half equations justify the above statement.
Date posted:
May 13, 2019
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Describe four output devices that could be found in a television broadcasting station
Date posted:
May 13, 2019
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Under certain conditions ,methane reacts with steam to form carbon (II) oxide and hydrogen only. Calculate the total volume of the gas that can be formed when 100cm3 of steam reacts completely with methane.
Calculate the enthalpy change of the reaction.
Date posted:
May 13, 2019
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Using a suitable equation explain why it is not advisable to use hardwater in hot water
systems.
Date posted:
May 13, 2019
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The catalytic oxidation of ammonia gas is done as per the set up below.
a) Name the catalyst used in the above reaction.
b) After sometime, brown fumes are formed in the flask. Explain briefly how this
observation occurs.
c) Why does the metal catalyst stay red hot for some time?
Date posted:
May 13, 2019
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Hydrogen gas is one of the lightest gas known but has not lived to its expectation to be used inObservation balloons. Explain
Date posted:
May 13, 2019
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Describe four characteristics of fifth generation computers.
Date posted:
May 13, 2019
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Briefly describe the concepts of downsizing as used in computer technology.
Date posted:
May 13, 2019
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Information communication technology (ICT) can be categorized into two broad
products; traditional computer-based technologies and digital data communication
technologies.
Required
i. Using suitable examples highlight six traditional office applications of ICT.
ii. Briefly describe three specialized applications of ICT.
iii. Differentiate between "internal networks" and "external networks" as used in digital data
communication.
Date posted:
May 13, 2019
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(i) Briefly explain four approaches to computing in an organisation
(ii) Give one advantage and one disadvantage of each of the approaches explained in (b) (i)
above
Date posted:
May 13, 2019