Neco computer answers now posted

  

Computer obj
1A 2D 3A 4A 5B
6A 7E 8C 9C 10C
11B 12D 13D 14E 15E
16C 17A 18B 19B 20D
21C 22E 23C 24A 25A
26D 27A 28A 29D 30A
31C 32A 33B 34A 35E
36E 37B 38D 39E 40A
41D 42B 43D 44B 45B
46B 47A 48B 49E 50E
51E 52E 53D 54C 55D
56S 57B 58D 59E 60A


4ai)
10 REM “Program to calculate the perimeter of a circle”
20 INPUT “R “
30 LET P1 = 22/7
40 LET P = 2 * P1 * R
50 PRINT P
60 END
4aii)
LET statement is used to assign a value to a variable.
REM statement is used to give the remark OR the comment within the program.
INPUT statement allows input of values after the RUN command is given.


4bi)Looping is the process whereby a software program repeat the same institution or processes the same information and over until it relieves the order to stop
ii)High level language TRANSLATOR compiler
Assembly Language Translator Assembler
iii)
BASIC
FORTRAN


2ai)
Copyright is a legal right created by the law of a country that grants the creator of an original work exclusive rights for its use and distribution. This is usually only for a limited time.
2aii)
spam is unsolicited junk email sent indiscriminately in bulk, often for commercial purposes. Much of it is sent by botnets, networks of virus-infected computers, complicating the process of tracking down the spammers.
2aiii)
Malware is short for malicious software, is an umbrella term used to refer to a variety of forms of hostile or intrusive software, including computer viruses, worms, trojan horses, ransomware, spyware, adware, scareware, and other malicious programs.
2aiv)
hacking:In computer science , hack verb means gain unauthorized access to computer data: to use a computer or other technological device or system in order to gain unauthorized access to data held by another person or organization.
2av)
Encryption is the most effective way to achieve data security . To read anencrypted file, you must have access to a secret key or password that enables you to decrypt it.

2b)
i)computer slowdown
ii)frequent crashes and freezes
iii)excessive drive or processor use
iv)unfamiliar programs and pop-ups

3ai)
A network topology is the pattern in which nodes (i.e., computers, printers, routers or other devices) are connected to a local area network (LAN) or other network via links

3ii)
i)Star topology
ii)bus topology
iii)Mesh topology
iv)Ring topology

3bi)Web server is a computer system, which provides the web pages via HTTP (Hypertext Transfer Protocol).
While
Web browser is a client, program, software or tool through which we sent HTTP request to web server.
3bii)
Hub connects multiple Ethernet devices together, making them act as a single segment.
While
Switch is used to connect various network segments.


6i) Collation is the assembly of written information into a standard order
Collation is a fundamental element of most office filing systems, library catalogs, and reference books.
ii)Information processing is the change (processing) of information in any manner detectable by an observer. As such, it is a process that describes everything that happens (changes) in the universe, from the falling of a rock (a change in position) to the printing of a text file from a digital computer system
iii)Information Analysis is a vital function in both government and the private sector. Analysts identify, obtain, analyze, and synthesize information to provide insights and advice to policymakers on critical decisions they must make.
iv)The gathering of relevant and up-to-date information is a key business process. Information consists of organised facts and figures that have meaning within the context that the information is intended to be interpreted by people. Information is thus a valuable business commodity, and frequently businesses pay money for up-to-date and relevant information.


6bi)A presentation program is a software package used to display information in the form of a slide show. It has three major functions: an editor that allows text to be inserted and formatted, a method for inserting and manipulating graphic images, and a slide-show system to display the content.


6bii)
a)Slide master
b)Slide notes
c)Transitions
d) plain text editor

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Neco IRS answers

I

==============================
1a)
Surah At-Tin ( The Fig ) - Aya count 8
وَالتِّينِ وَالزَّيْتُونِ ( 1 ) At-Tin ( The Fig ) - Aya 1
Watteeni wazzaytoon
وَطُورِ سِينِينَ ( 2 ) At-Tin ( The Fig ) - Aya 2
Watoori seeneen
وَهَٰذَا الْبَلَدِ الْأَمِينِ ( 3 ) At-Tin ( The Fig ) - Aya 3
Wahatha albaladi al-ameen
لَقَدْ خَلَقْنَا الْإِنسَانَ فِي أَحْسَنِ تَقْوِيمٍ ( 4 ) At-Tin ( The Fig ) - Aya 4
Laqad khalaqna al-insana fee ahsanitaqweem
ثُمَّ رَدَدْنَاهُ أَسْفَلَ سَافِلِينَ ( 5 ) At-Tin ( The Fig ) - Aya 5
Thumma radadnahu asfala safileen
إِلَّا الَّذِينَ آمَنُوا وَعَمِلُوا الصَّالِحَاتِ فَلَهُمْ أَجْرٌ غَيْرُ مَمْنُونٍ ( 6 ) At-Tin ( The Fig ) - Aya 6
Illa allatheena amanoowaAAamiloo assalihati falahum ajrun ghayrumamnoon
فَمَا يُكَذِّبُكَ بَعْدُ بِالدِّينِ ( 7 ) At-Tin ( The Fig ) - Aya 7
Fama yukaththibuka baAAdu biddeen
أَلَيْسَ اللَّهُ بِأَحْكَمِ الْحَاكِمِينَ ( 8 ) At-Tin ( The Fig ) - Aya 8
Alaysa Allahu bi-ahkami alhakimeen
1b)
a) Consequences of man’s spiritual and moral degradation
b) Rewards for the pious believers
c) The reality of the Day of Judgment
2ai)
By memorization
ii)
writting on trees,stone and slate
iii)
Loading.....
2bi)
tafsir-this term is defined as a branch of knowledge by which the Quran is understood, this also means the description of of the quran by the quran it self
(ii)
juz'u-is one of thirty parts of varying lengths into which the Quran is divided into.
(iii)
hizb-A juz is further divided into two ahzab (groups), and each hizb (group) is in turn subdivided into four quarters, making eight quarters per juz.
[7/12, 6:47 AM] Waka: 4a)
1)Sahih Bukhari, collected by Imam Bukhari
2) Sahih Muslim, collected by Muslim b. al-Hajjaj
3)Sunan Abu Dawood, collected by Abu Dawood
4)Jami al-Tirmidhi, collected by al-Tirmidhi
5) Sunan al-Sughra, collected by al-Nasa'i
6) Sunan ibn Majah, collected by Ibn Majah
4b)Ṣaḥīḥ al-Bukhārī is one of the Kutub al-Sittah (six major hadith collections) of Sunni Islam. These prophetic traditions, or hadith, were collected by the Persian Muslim scholar Muhammad al-Bukhari, after being transmitted orally for generations. Sunni Muslims view this as one of the two most trusted collections of hadith along with Sahih Muslim, yet not generally infallible.It is also used as an authentic hadith collection by Zaidi Shia Muslims. In some circles, it is considered the most authentic book after the Quran
7)
THE FIRST MIGRATION TO ABYSSINIA (ETHIOPIA):
The series of persecutions started late in the fourth year of Prophethood, slowly at first, but steadily accelerated and worsened day by day and month by month until the situation got so extremely grave and no longer tolerable in the middle of the fifth year, that the Muslims began to seriously think of feasible ways liable to avert the painful tortures meted out to them. It was at that gloomy and desperate time that Sûrah Al-Kahf (Chapter 18 — The Cave) was revealed comprising definite answers to the questions with which the polytheists of Makkah constantly pestered the Prophet (Peace be upon him). It comprises three stories that include highly suggestive parables for the true believers to assimilate. The story of the Companions of the Cave implies implicit guidance for the believers to evacuate the hot spots of disbelief and aggression pregnant with the peril of enticement away from the true religion:
The young men said to one another): And when you withdraw from them, and that which they worship, except Allâh, then seek refuge in the Cave, your Lord will open a way for you from His Mercy and will make easy for you your affair (i.e. will give you what you will need of provision, dwelling, etc.)18:16].
Next, there is the story of Al-Khidr (The Teacher of Arabia) and Moses (Peace be upon him) in a clear and delicate reference to the vicissitudes of life. Future circumstances of life are not necessarily the products of the prevalent conditions, they might be categorically the opposite. In other words, the war waged against the Muslims would

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Neco physics 2017 answers

*NECO PHYSICS 2017*

Physics obj

1-10 CEABCBAABB
11-20 DCCBCBCCAE
21-30 BECDDBEDDE
31-40 DBAEADBABA
41-50 CBDCBBBDCB
51-60 CEDDCBAEAA

1a) i) The body tube
ii) The launch jug
ii) The fins
iv) The engine holder
V) The nose cone
Vi) The recovery device

b) i) Telepresence
ii) Broadcasting
iii) Tele communication
iv) internet and multimedia

4) The specific latent heat of vaporization of a substance is the quantity of heat required to change unit mass of the substance from its liquid at the boiling point to vapour without a change in temperature

ii) potential energy is simply stored energy or the energy possessed by a body by virtue of its position while
Kinetic energy is the energy possesed by a body by virtue of its motion

3) The examples of stable equilibrium are :
a) a cone resting on its base
b) a racing car with low centre of gravity and wide base

Examples of neutral equilibrium are;
a) a cone or cylinder or an egg resting on its side
b) a ball on a smooth horizontal table

II) a ship is able to float because it is designed to displace a large volume of water, thus providing a big upthrust.

5) a. Sun
b. Wind
II) M1U1 + M2U2 = (M1 + M2) V
M1 = 15kg, M2= 5kg u1=10m/s u2=0 v=?
Momentum before = momentum after
15×10 +5×0 = (15 +5)v
150 + 0 = 20v
150 = 20v
V=7.5m/s

6) Wave front is defined as a line or surface in the path of an advancing wave on which all the particles are in the same phase or state of disturbance

ii) a) transverse wave
b) longitudinal wave

7a)

*Pupil eye*
It’s actually a hole, and the light that passes through the lens is absorbed by the tissues in the back of the eye giving the pupil it’s black look. … The pupillary reflex is the involuntary reflex that regulates the dilation and constriction of the pupil and the amount of light that enters.

7ii)
shutter is a device that allows light
to pass for a determined period, exposing
photographic film or a light-sensitive electronic
sensor to light in order to capture a permanent
image of a scene. A shutter can also be used to
allow pulses of light to pass outwards, as seen in a
movie projector or a signal lamp . A shutter of
variable speed is used to control exposure time of
the film. The shutter is so constructed that it
automatically closes after a certain required time
interval. The speed of the shutter is controlled by a
ring outside the camera, on which various timings
are marked.
*PART B*

==============================

1ai)- The body tube
– The launch lug

1aii) Broadcasting: This involves mainly television broadcast
– Internet and multimedia: This involves communication and exchange of information through the internet

1b)

=

==========≠=============

=======================

=====
3a)-Book lying on table
-A car engine that keeps running for a constant for a considerable length of time

3aii)
-Rolling ball
-Pendulum ball

3b) Ship floats in water,although they are made of steel and iron which are materials denser than water. This Is because the ship is hollow I.e an open object.

==========≠=============

=======================

=================

4a. Specific latent heat of vaporization ( L ) of a substance is the quantity of heat required to change unit mass of the substance from it’s liquid at boiling point to vapor without a change in temperature.

4b. – Kinetic energy is the energy due to motion while potential energy is the energy at rest due to it’s level or position.
– kinetic energy is an horizontal energy while potential energy is a vertical energy.
– Kinetic energy is denoted by k.E while potential energy is denoted by P.E.
– Kinetic energy does not act against gravity while potential energy acts against gravity.
=========================================

6a. Wave front is a line or surface in the path of advancing wave on which all d particles are in the same phase or state of disturbance.

6b.-Plane wave front
– Spherical or circular wave front.

=

==========≠=============

=======================

======================

7i)- Pupil:The pupil serves as the passage for light into the eye

ii)- Shutter:The Shutter works on the stimulation of light before photograph can be taken

III) Screen of pinhole camera: Ihelps to form images which are inverted

==========≠============

=======================

*PART II*

12ai) Newton’s second law of motion states that the rate of change of momentum is proportional to the impressed fotvr and takes place in the direction of the force

12aii)- The motion of the strings in a musical instrument eg. Guitar
– The motion of the balance wheel of a watch

12bi) Resultant force is that single force which acting alone will have the same effect in magnitude and direction as two or more forces acting together

12bii) Equilbrum force is that single force which will balance all the other forces taken together. It is equal in magnitude buy opposite in direction to the resultant force

12c)

==========≠=============

=======================

=====================
13ai)- Solar energy is for providing a cheap and clean source of hot water supply.
– Solar energy provides electricity supply

13aii)-Renewable energy are those that can be replaced as they are used up. They can be continually replenished as they are exploited and utilized while Non-Renewable energy are those that cannot be replenished as they are used up
-Examples of renewable energy are Solar energy, wind energy, Biomass and Bio feuls while examples of Non renewable energy are Coal and wood, Fossil fuel, Petroleum and Natural gas, Nuclear energy

13b) The principle of conservation of linear momentum us also utilized in the propulsion of jet aircraft. Gases are burnt within the combustion chambers of the engine. As jets of hot gases are expelled downwards through the tail nozzle at very high speeds from the aircraft, an equal and opposite momentum is given to the rocket or aircraft which then moves

13c)

==========≠=============

==================

1ai)- The body tube
– The launch lug

1aii) Broadcasting: This involves mainly television broadcast
– Internet and multimedia: This involves communication and exchange of information through the internet

1b)

=

==========≠=============

=======================

=====
3a)-Book lying on table
-A car engine that keeps running for a constant for a considerable length of time

3aii)
-Rolling ball
-Pendulum ball

3b) Ship floats in water,although they are made of steel and iron which are materials denser than water. This Is because the ship is hollow I.e an open object.

==========≠=============

=================

4a. Specific latent heat of vaporization ( L ) of a substance is the quantity of heat required to change unit mass of the substance from it’s liquid at boiling point to vapor without a change in temperature.

4b. – Kinetic energy is the energy due to motion while potential energy is the energy at rest due to it’s level or position.
– kinetic energy is an horizontal energy while potential energy is a vertical energy.
– Kinetic energy is denoted by k.E while potential energy is denoted by P.E.
– Kinetic energy does not act against gravity while potential energy acts against gravity.
=======================

5) a. Sun
b. Wind
II) M1U1 + M2U2 = (M1 + M2) V
M1 = 15kg, M2= 5kg u1=10m/s u2=0 v=?
Momentum before = momentum after
15×10 +5×0 = (15 +5)v
150 + 0 = 20v
150 = 20v
V=7.5m/s

6a. Wave front is a line or surface in the path of advancing wave on which all d particles are in the same phase or state of disturbance.

6b.-Plane wave front
– Spherical or circular wave front.

=

==========≠=============

=======================

======================

7i)- Pupil:The pupil serves as the passage for light into the eye

ii)- Shutter:The Shutter works on the stimulation of light before photograph can be taken

III) Screen of pinhole camera: Ihelps to form images which are inve

*PART II*

12ai) Newton’s second law of motion states that the rate of change of momentum is proportional to the impressed fotvr and takes place in the direction of the force

12aii)- The motion of the strings in a musical instrument eg. Guitar
– The motion of the balance wheel of a watch

12bi) Resultant force is that single force which acting alone will have the same effect in magnitude and direction as two or more forces acting together

12bii) Equilbrum force is that single force which will balance all the other forces taken together. It is equal in magnitude buy opposite in direction to the resultant force

13ai)- Solar energy is for providing a cheap and clean source of hot water supply.
– Solar energy provides electricity supply

13aii)-Renewable energy are those that can be replaced as they are used up. They can be continually replenished as they are exploited and utilized while Non-Renewable energy are those that cannot be replenished as they are used up
-Examples of renewable energy are Solar energy, wind energy, Biomass and Bio feuls while examples of Non renewable energy are Coal and wood, Fossil fuel, Petroleum and Natural gas, Nuclear energy

13b) The principle of conservation of linear momentum us also utilized in the propulsion of jet aircraft. Gases are burnt within the combustion chambers of the engine. As jets of hot gases are expelled downwards through the tail nozzle at very high speeds from the aircraft, an equal and opposite momentum is given to the rocket or aircraft which then moves

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Geography answers

   

 Job6b) Agriculture – Most of the people living in the area engage in the domestication of animals and cultivation of land – due to the presence of fertile soil.
– Mining : The region is also characterised with mining of solid minerals like limestones.
– Human Habitation : it is suitable for human habitation. It favours the construction of good transport network.
– craft type industries  –  The people engaged in the production of mats, ceramics etc.
(6c)
– water shortage

– unpredictable weather

– desert  encroacment

– Rural –  urban migration

3a)

i)Raw materials:industries must be located near the source of raw materials

ii)Availability of labour:industries are to be located where there are abundant labour supply

iii)Nearness to market:industries must be sited very close to market

iv)Power:industries must be sited where there will be constant supply of electricity

v)Good road network:the road network linking the market and the industry must be good
3b)

i)It help to improve standard of living

ii)It help to provide job opportunity

iii)it help to develop the infrastructure

v)it help in diversification of the economy
3c)

i)It helps to boast international trade

ii)It helps in capital formation

iii)it encourages the  development of science and technology

iv)It helps in stimulation of others sector

v)it helps to control inflation due to mass production=======================

SECTION B

5a. CLICK HERE FOR THE IMAGE

Tin is extracted by roasting the mineral casseterite with carbon in a furnace to approximately 2500 degrees Fahrenheit. The next step involves leaching with acid or water solutions to remove impurities. Electrostatic or magnetic separation helps to remove any heavy metal impurities.
5c-Industrial development

-Increase in employment

– Agricultural development

– Source of energy

– Development of self dependency
– Industrial development :

If the mineral resources can be extracted and utilized , mineral based industries can be established and expanded . Petrol , diesel , iron , coal, etc. are minerals for industries . This accelerates the industrial development.
– Increase in employment:

The existence of mineral resource provides employment opportunity to the people. Mineral resources help to establish the new industries where skilled and unskilled people can get employment opportunity.
– Agricultural development :

Some mineral resources are used to make modern agricultural tools machines and fertilizers , etc. They can be used for the modernization and commercialization of agriculture , which help to develop the agriculture .
– Source of energy:

There are various sources of energy like petrol , diesel , natural gas, etc. in Nepal. If these minerals can be extracted, they can provide the necessary energy for industrial sectors and house hold use.
– Development of self dependency :

If we develop mineral resource based industries , we can create more jobs with quality products . We will be independent when industrialization occurs with the uses of mineral resources.
=======================SECTION A

1ai) i)availability of water- there is adequate water supply for the use of man for farming activities and other social activities

 ii)fertile soil- the availability of fertile soil that support farming also tends to attract people to the area

iii)presence of water- water is the basic necessity for serveral purposes including irrigation and domestic uses

 iv)agriculture- agriculture activities is widely practised in the area which also attracts people to the area

1aii) i)there is presence of thick forest that makes agricultural mechanization impossible

 ii)there is presence of harmful bacterial that causes disease in the area

 iii)basic ammenities are lacking in the area which tends to drive people away from the area

 iv)there is lack of natural resources like minerals in the area which tends to attract population

 1b) i)provision of adeqauate basic facilities ii)industrilization of the area iii)improving their medcal facilities iv)improvement of agricultural activities in the area



2b)

– Physical Supply Of Products

Transportation carries necessary raw materials to factory for production of goods and supplies finished goods to consumers. It creates place and time utility of goods by transporting from one place to another. It easily carries finished to the hands of those who need and use them. This significantly increases aggregate sales of goods. In fact, transport is such a key of marketing, which helps in carrying goods to the scattered consumers in different places, narrows the gap between producers and consumers and facilitates to distribute goods to the consumers at minimum cost and time.
– Specialization

Transportation facility encourages division of labor and specialization on geographical or regional basis. Transportation cost highly affects localization of industries. Production of goods may center at such place where the environment is the best and production cost is minimum. This makes maximum utilization of local resources possible, which is both economically and socially necessary.
– Mobility Of Labor And Capital

Transportation facility provides mobility to labor and capital. If more labor force is available at any place, transport helps to carry it economically to necessary place. The means of transport carry labors from one place to another. This encourages labor and capital to use and invest in more productive sectors.
– Stabilization In Price

Transportation helps to bring stability in price of different products. It transports goods from more supplied places to scarcely supplied areas. This establishes coordination between demand and supply, and brings stability in prices. It helps to supply necessary goods regularly to the consumers. Besides this,

consumers get necessary goods at lower prices, because it encourages competition among producers and makes mass production at lower cost possible.
========================

3a)-Raw Materials:

Firms using raw materials that are costly to transport will definitely be attracted to the source of the raw material. Some firms operate in a “weight” reducing technique, where a given quantity of raw materials is processed down into a small quantity of finished products. It’s cheaper to transport the lighter finished goods to the market, than it is to transport the bulky raw materials to the industry e.g. The Kenya Orchards Ltd has got its main food processing plant at Machakos because the vegetables, which are the raw materials, are grown near Machakos.
– Markets:

Some firms find it economically viable to locate themselves as close as possible to their markets. This applies to firms which use a given quality of raw materials. They use these given raw materials to add weight to the products during the manufacturing process so that the finished products are heavier. These industries are known as the “weight” increasing industries; e.g., the brewing industries.
– . Fuel and Power:

Fuel and power do not play a vital role in East Africa as it does in the established industrial centers of Europe and North America, which substitute electricity with coal. Most firms in East Africa use electricity as their main source of power and this can be transported over long distances and at low costs. However, major electricity generating plants may attract a conglomeration of firms especially those which use large quantities of electricity. This can be well illustrated by the concentration of many industries near Owen Falls at Jinja, Uganda. Owen Falls is Uganda’s electricity generating plant.
– 4. Labor:

Due to high levels of unemployment in Nigeria, unskilled labor is usually available throughout the region. Therefore, firms requiring skilled and semi-skilled labor will have to locate themselves in the already established industrial centers in major towns or be prepared to undertake intensive training programmes.

=========================

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Waec gce runs 2017 subscription

     

NOTE:
LISTS OF AVAILABLE SUBJECTS FOR WAEC GCE 2017 RUNS
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Agric
Further
Maths
CRk
Igbo
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Newly introduced Subjects
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Neco chemistry answers posted

.. ISTRY OBJ*

1-10ACBAEDCCAB

11-20ECACDCADBC

21-30ECCEBADADB

31-40CABEBBABEA

4159DDDBAABDEB

51-60-CEEEEECBDA   .
CHEMISTRY  SOLUTIONS*
1ai)-Boiling Point and Freezing Point.

-Surface Tension, Heat of Vaporization,volume

apor Pressure.
1aii)
1aiii)- Aluminium
1aiv)bauxite
1bi)-A

-D

-C

-E

-B
1bii) A standard solution is a solution containing a precisely known concentration of an element or a substance. A known weight of solute is dissolved to make a specific volume. It is prepared using a

standard subs as a primary

standard.
1biii)-A dilute solution contains a smaller amount of solute than does a concentrated solution

– A dilute solution contains more solvent than an equal volume of

concentrated solution does.
1ci)- monosaccharides

-disaccharides
1cii) DRAW TJE STRUCTURAL FORMULA
1ciii) A lighted wooden splint goes out in a

test tube of carbon dioxide but this happens with other gases, too. It is better to bubble the test gas through limewater – calcium hydroxide solution. Carbon dioxide turns limewater cloudy white.

==================

2ai) – Oxidation is a process involving on loss of electrons

– Reduction is a process involving the removal at electronegative elements as well as the addition of electro positive elements
2aii) – Nitrogen is a colourless,odourless and tasteless gas

– it is slightly lighter than air
2aiii) X represents urea [(NH2)2Co)]

– Y represents water[H2o]
2bi)

Chlorine|35|17|18|1s^2 2s^2 2p^6 3s^2 3p^5

Fluorine|18|9|10|1s^2 2s^2 2p^5
2bii) No of moles= Mass/Molarmass

=5/25+16+1

=5/40

No of moles=0.125mole
2biii) Relative atomic Mass=

(18 × 1/3) + (20 × 2/3)

=19.3
2ci)Faraday’s second law of electrolysis states that, when the same quantity of electricity is passed through several electrolytes, the mass of the substances deposited are proportional to their respective chemical equivalent or equivalent weight.
2cii) Single line represents the electrode/electrolyte reaction

– Double lines represents interface in the full cell
2ciii) Polymerization is the process whereby two or more monomers link together to form a compound of high molecular mass called the polymer
2civ) – It is used as a fuel in rockets

– It is sometimes uses as an anti-freeze

-it is used to dissolve soaps,perfumes etc
==================================================

3ai)

i) Metals differ so widely in hardness, ductility (the potentiality of being drawn into wire), malleability, tensile strength, density, and melting point.
ii) Mercury is liquid at room temperature and gallium melts on our hand while tungsten has a melting point of 3687K (3414 0C)
iii) Most metals are highly lustrous (they shine very brightly) and sonorous (they produce sound when struck)
=========================

5a) Peroxide are oxides containing a higher proportion of oxygen than the ordinary oxides
ii)-Sodium Peroxide Na2O2

-Hydogen Peroxide H2O2

-Barium Peroxide Ba2O

-Calcium Peroxide CaO2
Iii)

 II)The Ionic Polar Head of Soap Molecules that are responsible for it solubility

III) In acidic Water it react with excess Hydogen ions to form unionized fatty Acids
iv) Biodegradibility of Soap Molecules means that Soap can easily be decomposed by bacteria into simple inorganic substances, so it does not cause Water Pollution

5ci) Boyle’s law states that at constant temperature for a fixed mass, the absolute pressure and the volume of a gas are inversely proportional. The law can also be stated in a slightly different manner, that the product of absolute pressure and volume is always constant.

6ai)

I)solution A is starch solution, sample B is Iodine

II)the colouration is formed due to the formation of an Iodine starch complex

III)

i)Iodine is used in treatment of goitre

ii)Iodine is used in making dye for colour photography

6aii)

dalton’s law of partial pressure states that in a mixture of non-reacting gases, the total pressureexerted is equal to the sum of the partial pressuresof the individual gases.

6bi)

C – 4.08/12, H – 0.68/1, O – 5.46/16

0.34/0.34, 0.68/034, 0.34/0.34

1, 2, 1.

The emperical formula is CH2O

6bii)

( CH2O)n =60

((12*1)+(1*2)+(16*1))n=60

(12+2+16)n=60

30n/30=60/30

n=2

(CH2O)2=C2H4O2

the molecular formular is C2H202

6ci)

i)exothermic reaction

ii)A is activation energy, B is DH(Negative)

6cii)

i)removeal of carbon(iv)oxide

ii)liquetying the air

6ciii)

vander waal forces

6di)

fats have higher melting point than oil because fats are more denser

6dii)

i)it is poisonous

ii)it is 2,5 times denser than air

iii)it is greenish-yellow gas with a choking smell

6diii)

Zn^2+ has comppletely filled d-orbitals and there are no vacant d-orbitals for the transition of electrons while Sc^3+ has completely empty d-orbital and there are no electrons for d-d transition thus they are colourless==================================Completed. enjoy.

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Neco literature answers

Lit1 Obj
1- 10 DBDBECBBCA
11-20 ECAABEACBC
31-40 AAEEDCADAA
41-50 DCABBDCECB
51-60 BDEEBADBBA

.


 Lit1 Theory:Section: 1


1)Kabria’s Encounter with FofoIn sharp contrast to the life in Sodom and Gomorrah is Kabria’s life with her family. A mother of three lively children- Obea, Essie and Ottu, she lived in a decent neighbourhood in Accra, worked with MUTE a non-governmental agency and drove a problematic old car nick-named Creamy. She ran into Fofo at the Agbloghoshie market while shopping for vegetables.Kabria was standing with other spectators at the spot where Baby T’s body was found when Fofo, disguising as a boy tried to steal her purse. Kabria rescued her from the angry mob. Fofo revealed her female identity and told Kabria that Baby T was her sister. Meanwhile, a lot of people had been made to believe that the dead girl (Baby T) was a kayayoo(a market porter from the north) to conceal her true identity and discourage further enquiry into her death. MUTE (the non-governmental organisation where Kabria worked) got interested in Baby T’s matter and granted Fofo protection by taking her into custody temporarily while conducting investigations into the circumstances surrounding


Section: II
5)
-BIANCA-CHARACTER-
A servant and confidante of Hippolita, Matilda, and Isabella. Silly, nosy, and superstitious, Bianca often gossips and shows that she is willing to be deceitful when she tries to pry into Theodore’slife and when she agrees to be Manfred’sspy. On her way to spy on Isabella, Bianca witnesses a giant hand in armorthat scares her and causes her to inadvertently reveal Manfred’s bribe to Frederic. She often provides comic relief in an otherwise melodramatic story.
-BIANCA-ROLE-
Roles of Bianca in the castle of otranto – servant of Matilda

Theory COMPLETED

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