FORM IV EXAMINATION
SECTION A: (40 marks)
- For each of the following items (i) – (x) choose the correct answer from the different options given in the question below and write its letter beside the item number.
(i). The earliest inhabitants of South Africa were known as………….
- San or Bushmen
(ii). Walata was a trading town found in
- West Africa
- Central Africa
- East Africa
- North Africa
(iii). The British captured the ………. In 1975 after taking control of India
- Orange state
- Darkens beurg mountains
- Republic of South Africa
(iv). The slaves from the interior of East Africa were sent to all the following except
- Zanzibar to work in clove and coconut plantations
- Arabia as domestic Servants
- India and china as sailors
- America to work in the mines
(v). Trade developed in the Africa societies mainly because
- There was surplus production
- There was good leadership
- Presence of trade routes
- There presences of Oman Arabs
(vi). Nyungu ya mawe ruled a kingdom called
- Mawe in Tabora
(vii). The main responsibility of moran was
- To kill animals for food
- To defend and protect the society
- To settle disputes
- To tend animals
(viii). From chronological chart the year 1840 signifies
- Missionaries visit to Rabai
- Seyyid said shifts his capital to Zanzibar
- Arabs introduce cloves in Zanzibar for the first time
- Zanzibar becomes a British protectorate
(ix). The theory of evolution of man based on the understanding that man changed gradually from ancestors to modern man was proposed by
- Dr. Leakey
- Charles Darwin
- None of the above
(x). Askia Mohamed was king of the ……….kingdom
- A) The time chart below shows date in Column I and events in column II Match the dates in column I with the corresponding events by writing the letter of event beside the number of the date in your answer sheet.
(i). 1905 – 1907
(ii). 1891 – 1894
A. Birth of Nziga Mkuu
B. Anglo German agreements in East Africa
C. Angola & Mozambique independence
D. Formation of Dutch East African company
E. The coming of Boers and Settled in south Africa
F. Buganda agreement
H. Helgoland treaty
I. Independence of Ghana
J. Great economic depression
K. The outbreak of WWI
L. Majimaji resistance in southern Tanganyika
M. The fall of fort Jesus
N. The coming of Boers in the cape of good hope
O. Nyamwezi resistance
P. Imperialism stage
Q. Rise of capitalism
R. French revolution
S. Colonial economy
T. Registration of kipande system
- b) Mention five (5) trade commodities (items) involved in the Trans
SECTION B: (60 marks)
Answer only THREE questions
- The great depression was a serious economic crisis which happened as a result of nature of the capitalist economy. Discuss the causes of the great depression.
- In ruling Uganda and later Tanganyika, The British applied lord Lurgard’s theory of ‘indirect rule’. Analyze the reasons of the application of indirect rule on the part of British.
- During colonial economy it was difficult to separate migrant labour from settler economy. Discuss why plantation, mining and settler economies preferred the use of migrant labour?
- “The struggle for Independence in Portuguese colonies of Angola and Mozambique took long time” Analyze the reasons for Being late to get independence and to use armed struggle.
- Discuss how did the colonial state establish and consolidate settler agriculture in Kenya.
- Both scramble and Partition happened in the 19th scramble happened in Africa while partition happened in Europe. Discuss the reasons for Intensive scramble in Egypt and Congo Basin areas.
FORM IV EXAMINATIONS
- This paper consist of section A, B and C
- Answer All questions in this paper
- The following constants may be used.
Avogadros number=6.02 × 1023.
GMV at S.t.p=22.4dm3
SECTION “A” (20 marks)
Answer all questions in this section.
1.For each of the items (i)-(x) choose the correct answer from the given alternatives and write its letter beside the item number in the answer sheet provided.
- Which of the following hydrocarbons does not belong to the same homologous series as the others?
- A) CH4 B)C3H8 C)C4H10 D)C6H12 E)C5H12
- How many numbers of shells are there in magnesium atom?
A)1 B)2 C)3 D)4 E)5
iii)What is the oxidation state of chlorine in KClO3?
A)+2 B)–5 C)+5 D)+3 E)–3
- iv) Why water is a universal solvent?
- It is neither acid nor basic than any other known liquid
- It disloves more substances than any other known liquid
- It occur naturally in all the three states of matter than any other liquid
- It dissolve both organic and inorganic solutes than any other liquid
- It dissolve both metals and non-metals element than ay other liquid
- v) Which of the following is an example of weak acid?
A)Acetic acid B)Sulphuric acid
C)Hydrochloric acid D)Sodium Hydroxide
vi)Which among the following equations correctly shows the reaction between chlorine gas and water?
- Cl2(g) + H2O(l) Cl2(g)
- 2Cl2(g) + 2H2O(l) 4Cl–(aq) +O2(g) + 2H2(g)
- Cl2(g) + H2O(l) HCl(aq) + HOCl(aq)
- Cl2(g) +2 H2O(l) 2HOCl2(aq) + H2(g)
- Cl2(g) +3 H2O(l) Cl2(g) +2H3O+
vii)Chemical change means;
- The change is reversible
- Can easily be separated
- The change is complete
- New substance is produced
- Produce no change of mass
viii)The only mental which does not react with dilute hydrochloric acid is
A)Magnesium B)Aluminium C)Copper
ix)The ionic equation when aqueous ammonium chloride reacts with sodium hydroxide solution is represented as;
- 2NH4+(aq) +2Cl–(aq) ————-> 2NH3(g) + Cl2(g) +H2(g)
- Na+(aq) +Cl–(aq)—————–> NaCl(s)
- NH4+(aq) +OH–(aq) —————->NH3(g) +H2O(l)
- H+(aq) +OH– ————————> H2O(l)
- 2NH4+(aq) +2Cl–(aq) ———————–>2NH3(g) +2HCl(g)
x)Fractional distillation process of mixture of water and ethanol is possinle because;
- Water and ethanol have the different boiling point
- Water has lower boiling point than ethanol
- Ethanol has lower boiling point than water
- Water and ethanol are immiscible liquid
- Water and ethanol are universal solvent.
2.Match the item in list A with the responses in list B by writing the letter of the correct response beside the item number in the answer booklet provided.
i) Group of elements which react quickly with water to form alkaline solution
ii)The ability of an atom to attract an electron
iii)Group of elements which reacts slowly with water to form alkaline solution
iv)A vertical column of elements in the periodic table
v)Group of elements in which their shells are completely filled up
vi)Group of elements which with metal to form salts
vii)Group of elements which reacts by receiving electrons
viii)The systematic arrangement of elements according to their increase in atomic numbers
ix)Group of elements with high densities and melting points and often act as catalysts
x)Group of element which have both metallic and non –metallic characteristics
D. Transition element
E. Electro negativity
F. Alkali metals
H. Periodic law
I. Alkali earth metal
J. Rare non metals
L. Noble gas
M. Periodic table
SECTION “B” (54 marks)
Answer all questions in this section
- a) i)State three (3) components needed to start a fire.(2 marks)
ii)List five (5) classes of fire. .(2 marks) .
b)State three (3) chemical properties of alkaline metals. .(2 marks)
4.a) i)Give three (3) characteristics of a good fuel. .(1 marks)
ii)Give the categories of fuel on the basis of their occurrence (or preparetion). .(1 marks)
b)Study the following chemical equation and answer the question that follow
N2(g) +3H2(g) 2NH3(g) ∆H= –190.8 KJ/Mol.
i)What is the industrial name of the process by which ammonia gas is formed as product.(1marks)
ii)Explain why increase in pressure gives a better yield of ammonia. .(1 marks)
iii)With a reason, state .whether a high temperature or low temperature will give a better yield of ammonia. .(2 marks)
5.a) i)Explain in terms of electronic configurations, why sodium and potassium elements have similar chemical properties. .(2 marks)
ii)State the trend in electro negativity of group I element in the periodic table and give reasons for it. .(2 marks)
b)Study the following part of the periodic table and list down the names of all the missing elements (starting from 1 up 6).
(3 Marks =½@ each)
6.In an experiment, 1M of H2So4 was titrated again of XOH solution having a concentration of 40g/dm3.The volume of the pipette used was 25cm3 and the results were as follow;
Final readings (cm3)
Initial readings (cm3)
Volume used (cm3)
- a) i)Complete the table by filling in the volume used in each column. .(1 marks)
ii)Calculate the mean titre volume in cm3. .(1 marks)
iii)Write down a balance chemical equation for the reaction at the end point.(1 marks)
- b) i)Find the molarity of XOH solution.(1 marks)
ii)Calculate the atomic mass of X in the compound XOH .(1 marks)
iii)Name the element X.(1 marks)
7.a) Briefly explain what will happen when;
i)Hydrochloric acid react with potassium permanganate.(1 marks)
ii)Monoclinic sulphur left standing at room temperature.(1 marks)
iii)Sulphur dioxide reading dissolves in water .(1 marks)
b)How many atoms are there in 8.68g of magnesium? (3 marks)
8.a)Give the chemical properties of oxygen (give four points) (3marks)
b)Suggest the suitable indicator for the following titrations;
i)Hydrochloric acid against ammonia solution.(1 marks)
ii)Sulphuric acid against sodium hydroxide.(1 marks)
iii)Ethanoic acid against potassium hydroxide solution .(1 marks)
- a) i)What type of chemical bond is found between chlorine atoms in chlorine molecule?(1 marks)
ii)Name other type(s) of chemical bond formed by chlorine with other elements.Give an example of a compound in which chlorine form this type of bond .(1 marks)
b)Compound Z contain 24.24% carbon,4.04% hydrogen and 71.72% chlorine.Given that the vapourdensity of X is 49.5
i)Calculate the molecule formular of the compound X.(2 marks)
ii)Draw and name the displayed structure formular of the possible isomer(S) from the molecular formula determined .(2 marks)
10.a)Give three ways of removing permanent hardness of water.(2 marks)
b)Differentiate the following terms.
i)Isotopes and isolopy.(2 marks)
ii)Hygroscopic and deliquescent solutions.(2 marks)
11.a) i)State faraday’s second law of electrolysis.(1 marks)
ii)Give the factors that affect the ions discharged at the electrons.(2 marks)
b)A steady current of 2A was passed through as solution containing ions of a metal (M2+) for nine minutes.The mass of metal M that was liberated were 0.3552g.Calculate the molar mass of metal M and give the name of metal M .(3 marks)
SECTION “C” (26 marks)
12.Discuss four causes of loss of soil fertility.(10 marks)
- a)Name the following compound according to IUPAC system.
ii)CH3 CH CH2 CH=CH2 (2 marks)
iii)CH3 C- CH2 COOH (2 marks)
- b) Explain why sand is put into the around bottomed flask during the preparation of ethynes while in preparation of ethane sand is put outside the around bottomed flask.(10 marks)