- Study the information in the table below and answer the questions that follow:(Solved)
Study the information in the table below and answer the questions that follow:
a) Write the electron arrangement of element P.
b) Give the group and period to which elements Q and R respectively.
Date posted: October 15, 2019.
- Compare with a reason the atomic radius of Sodium to that of Aluminum.(Solved)
Compare with a reason the atomic radius of Sodium to that of Aluminum.
Date posted: October 15, 2019.
- Identify the particles that facilitate the electric conductivity of the following substances
(i) Sodium metal
(ii) Sodium Chloride solution
(iii) Molten Lead Bromide(Solved)
Identify the particles that facilitate the electric conductivity of the following substances
(i) Sodium metal
(ii) Sodium Chloride solution
(iii) Molten Lead Bromide
Date posted: October 15, 2019.
- An element W has an atomic number 13.
a) Write the electronic configuration of the most stable ion of W
b) Write the formula of the oxide...(Solved)
An element W has an atomic number 13.
a) Write the electronic configuration of the most stable ion of W
b) Write the formula of the oxide of the element W
Date posted: October 15, 2019.
- The grid below is part of the periodic table. The elements are not represented by their actual symbols. Use the information to answer the questions...(Solved)
The grid below is part of the periodic table. The elements are not represented by their actual symbols. Use the information to answer the questions that follow.
a) (i) Which is the most reactive
(I) Non — metal?
Explain
(II) Metal?
Explain
(ii) Name the family to which elements T and Q belongs.
(iii) Write the formula of the compound formed when W reacts with S.
(iv) Name the type of bond and structure formed when elements R and K react.
(v) Explain why element N doesn’t form compounds with other elements.
(vi) Compare the atomic radii of T and Q. Explain.
Date posted: October 15, 2019.
- The grid below represents part of the periodic table. Study it and answer the questions that follow:(Solved)
The grid below represents part of the periodic table. Study it and answer the questions that follow:
(a) (i) Identify the element that gains electrons most readily
(ii) Which of the metal is most reactive? Explain
(iii) What name is given to the family of elements to which elements X and T belong?
(iv) Explain why:-
(I) Ionic radius of Q is larger than that of M
(II) Atomic radius of Q is greater than that of S
(v) Which of the element in the table does not have the ability to form an ionic or covalent
bond? Explain
(vi) Give the formula of the compound formed between R and Z
Date posted: October 15, 2019.
- The grid below represents part of the periodic table. The letters do not represent the actual symbols of the elements. Study it and answer the...(Solved)
The grid below represents part of the periodic table. The letters do not represent the actual symbols of the elements. Study it and answer the questions that follow:
(a) Explain why element L appears in two different groups in the grid above
(b) State the name of the chemical family to which P and Q belong
(c) Write the formula of the compound formed between P and V
(d) Compare the melting points of Q and S. Explain
(e) Identify an element whose oxide dissolves in both acids and alkalis
(f) Write the equation for the burning of T in excess air
(g) Using dots (•) and cross (x) to represent electrons, draw a diagram to illustrate bonding in the sulphide of Q
(h) State one use of element X
Date posted: October 15, 2019.
- Study the equation below:(Solved)
Study the equation below:
Mg(s) + 2H2O(l)------->Mg(OH)2(aq) + H2(g)
Which species has undergone oxidation .Explain
Date posted: October 15, 2019.
- Work out the oxidation number of phosphorous in the following compound H3PO3(Solved)
Work out the oxidation number of phosphorous in the following compound H3PO3
Date posted: October 15, 2019.
- Soma taarifa ifuatayo kisha ujibu maswali yanayofuatia:
Shule yangu ya upili(Solved)
Soma taarifa ifuatayo kisha ujibu maswali yanayofuatia:
Shule yangu ya upili
Majio yangu katika shule hii ya upili hayakutokea kwa bahati nasibu bali kwa mipango kabambe niliyoianza tangu nikiwa shule ya vichekechea. Nikiwa sitetereki hata kwa wazazi wangu waliponisihi nijiunge na shule nyingine za karibu nikawa sisikii la mwadhini wala la mteka maji msikitini. Nikawa na ragba ya mkanja nikingoja siku ya kujiunga na shule yenyewe. Kweli majuto ni mjukuu na huja kinyume.
Nilizaliwa katika aila yenye nafasi iliyotopea na kubobea katika ukwasi uliodhihirika kutokana na mitaa tulikoselelea kwa muda kabla ya baba kuaamua kununua nyumba yake mwenyewe huko upande wa Karen hivyo tukagura kutoka Runda. Wakati wa likizo tukawa tunaruka hadi pwani ambako mama yangu alikuwa amemiliki jumba lililokuwa katika ufuo wa bahari lililojengwa katika kipande kisichopungua ekari tatu alilotunukiwa wakati wa nikahi yao na wakwe wa baba yangu.
Wavyele wangu wakawa wanaendesha magari meusi ya kifahari ingawa sikuwahi kumwona mama akichangamka kuendesha magari yake ya maana, kila macheo ya siku za kazi gari lililoendeshwa na dereva ambaye alimstahi mama hadi akawa anamfungulia mlango wa gari na kuufunga baada ya mama kujitoma katika tumbo la gari lilimjia na kumrejesha kwa wakati. Nikajiunga na shule ya msingi ya kibinafsi ambako nilishughulikiwa kama kikembe. Wengi wa wale tuliosoma nao walikuwa wa tabaka langu na walikuwa wametoka katika kila sehemu nchini Kenya.
Hayawi hayawi huwa na siku ya kuripoti ikafika. Alfajiri, dereva mmoja akatumwa kwenda hadi Kisumu ili atulaki na kutusafirisha kutoka uwanja wa ndege hadi shule ya upili ambayo ilikuwa yangu ya rohoni. Nasi tukaelekea hadi uwanja wa ndege ili turuke hadi Kisumu. Safari yetu kutoka kitongoji cha kifahari hadi Airport ilikuwa njema, safari yetu tulipoabiri ndege ilikuwa bila bughudha, safari yetu kutoka Kisumu mjini haikuwa na kasoro na tulienda kulingana na mpango. Safari yetu ilikuwa mufti hadi tulipofika katika lango la shule ya kitaifa!
Tulipotia ozi tu!!....jamani......jamani nikafa moyo. Labda mama aliweza kubaini mabadiliko ya hisia zangu, nilitamauka, nikawa mchege na kusema kweli niliyoyaona sikuamini. Mvua iliyokuwa imepasua hapo awali ilikuwa imeacha vitua vya maji kwenye vijia vya kutembea vilivyochakaa na kubomoka bila yeyote kujali kuvikarabati. Majengo yalikuwa makongwe yaliyojengwa miaka mia moja iliyopita na yalistahili kuitwa makafadhi badala ya pahali pa kumkaribishia mwanafunzi aliyepita kwa alama mia nne na thelathini na tano.
Asiye na wake ana Mungu, nikapiga moyo konde lazima nisajiliwe katika shule ya ndoto langu. Ningewezaje kughairi wazo langu baada ya siku hizo zote za maandalizi tena mbele ya wanuna walioniona kama kielelezo chao tangu walipozaliwa. Nikasajiliwa!
Sikujua, hakika sikujua, sikujua shule ya upili ya kitaifa yaweza kuwa hivi. Kweli mwanafunzi aweza kukosa viatu na hata kushindwa kununua rangi ya kupaka viatu hivyo iwapo amenunuliwa na wahisani? Nilimlaumu ninamaana hakunieleza kuwa mtu anaweza kula chakula ambacho mbwa wetu hawezi hata kukiangalia. Nilipoingia katika ukumbi wa chakula nilihisi kitefutefu nusura nichafukwe na moyo, makapi ya mboga na uchafu usioelezeka ulinikumba, kisha nikapewa kisahani cha plastiki na kupakuliwa kipande cha ugali ambacho bado kilikuwa na unga na kuachiwa hiari ya kukila au kukitupa. Wenzangu wakawa wanakirambatia chakula kwa kasi
huku mmoja wao alipoona jinsi nilivyokiangalia changu akanihisi nimpe chote na kukimaliza fyu. Wote walikuwa na furaha kemkem na kuajabia utukufu wa shule iliyotukuka ya kitaifa ila mimi.
Baada ya mlo ‘rojo rojo’, tukaelekea darasani nilikopigwa na mghuma mkubwa. Tulikuwa wanafunzi hamsini na watano katika darasa moja tu! Mwalimu mmoja akaja na kutukaribisha shuleni kisha akatuarifu kuwa atakuwa mwalimu wa darasa letu. Nilipomsikia akinena nusura niishiwe na stahamala, kimombo chake kilinishangaza, hasa matamshi yake yalipungukiwa na kudhirisha athari za lugha ya asili. Nilihisi kana kwamba ningemrekebisha lakini sikudhubutu.
Tukafululiza hadi bweni na nikajilaza kitandani chembamba huku mwingine nisiyemjua lakini asiyejua kuwa kuna nguo maalum za kulala akalala uchi katika ghorofa ya juu ya kitanda chetu. Mgeni njoo mwenyeji apone maana baada ya muda wadudu ambao sikuwahi kuwaona aushini mwangu wakanza kunishambulia. Nikaamka baada ya kumnasa mmoja wa wadudu hawa na kuuliza mmoja wa wenzangu ni wepi wadudu hawa na kwa kutojali hata kidogo, akanieleza kuwa hawana neno bali ni kunguni tu, sikujua na kwa kweli mama hakuniambia kuwa kuna wadudu wanaotafuna mtu na hunuka fye! Sikulala kwa hofu huku wenzangu wakiforota kwa njia ya kunighasi. Sikuwahi kudhani kuwa watu wengi wanaweza kulala chumba kimoja huku changu kikiwa na hamamu na vifaa vyote muhimu kikibaki bila mtu!
Tulisomeshwa na walimu wasiojali kana kwamba tunaelewa au la. Hawakushughulika iwapo tulifanya kazi za ziada au la, ndio, hakujali chochote. Kilichonishangaza ni kuwa wanafunzi waliojiunga nasi kutoka shule za umma wenye alama duni waliwapenda na kuelewa haraka walichosomeshwa na hawakujali matamshi yao, labda hawakuyatambua.
Hatimaye tukafanya mtihani wa mwisho wa muhula wa kwanza. Nilishangaa ghaya iliponibainikia kuwa aliyetuongoza alikuwa ghulamu mmoja mshamba niliyempuuza tu mvulana kutoka kijijini ambacho singetambua katika ramani ya nchi ambaye hata vitu vya kimsingi vilimpiga chenga. Nikafanya uchunguzi nikatambua mwenzangu alikuwa na alama mia mbili hamsini na tatu akitoka katika darasa la nane, nilifanikiwa kuwa nambari mia mbili hamsini na tatu kwa jumla ya wanafunzi mia tatu!
Tulipofunga kwa likizo ya Pasaka nikaamua kuchukua hatua nyingine sitawahi kuhama kutoka shule hii ya upili wala kuwa zaidi ya nambari kumi!
Maswali
a) Thibitisha kauli kuwa msimulizi ana msimamo dhabiti.
b) Tofautisha jinsi mwandishi alivyofunzwa katika shule ya kibinafsi na shule ya upili.
c) Taja mambo matatu yanayotuonyesha kuwa msimulizi alilelewa katika aila ya kikabaila kulingana na aya ya pili.
d) Andika masuala matatu yaliyomshangaza katika shule ya upili.
e) Andika tamathali mbili zilizotumika katika kifungu.
f) Eleza maana ya msamiati huu kama ulivyotumika katika kifungu.
i) alimstahi
ii) kughairi
iii) kunighasi
Date posted: October 15, 2019.
- Study the table below and answer the questions that follow.(Solved)
Study the table below and answer the questions that follow.
(i) Complete the table above
(ii) From the table, choose the most reactive metal. Explain
(iii) Which element is the most electronegative. Explain
(iv) Using dots (.) and crosses (x) to represent electrons, show the bonding in the chloride of Q
(v) Explain the solubility of element T in water
(b) (i) Why is aluminium used to make utensils yet it is a reactive metal?
Date posted: October 15, 2019.
- Read the following story and then answer the questions that follow.(Solved)
Read the following story and then answer the questions that follow.
Once upon a time, the pot and the drum got into an argument. They were sitting idly in a house when the pot suddenly said to the drum, 'You know, I’m tougher and stronger than you.' 'Oh!'Exclaimed the drum. 'Are you now? How’s that?' 'Well, just look at me,” said the pot. “Isn’t it obvious?' The drum took a long and hard look. The pot was a huge round thing, all made of clay and
black with soot from years and years of cooking over hot, smoky fires.
'I sit over fires day in, day out,' continued the pot after a while. 'The more they burn me, the stronger I get. Could you, drum, sit over a fire for even half a minute? Why, you would be burnt to ashes.' The drum could not dispute that. He certainly would not dare sit over a blazing fire. He was made of wood, you see, a hollowed-out trunk, spread with a skin at both ends. So he said to the pot, 'I agree with you. I couldn’t stand a fire even for a brief moment. But how about you facing my drummer with his drumsticks? I would love to see you stand up to the kind of pummeling he gives me day in, day out.' he pot was scared stiff at the thought of being struck with drumsticks. He immediately suggested that they drop the argument, and they did.
Questions:
i) Identify and illustrate three characteristics of narratives present in this story.
ii) What two features of oral performance would you employ in the effective delivery of the story?
iii) List down the reason why the pot feels he is stronger than the drum and vice versa.
iv) How does the drum hit back at the pot?
v) Who won the argument and why?
vi) How would you classify the above narrative? Give a reason.
vii) Give a suitable title for the above narrative
Date posted: October 15, 2019.
- The grid below shows a part of the periodic table. The letters do not represent the actual symbols.(Solved)
The grid below shows a part of the periodic table. The letters do not represent the actual symbols.
Use it to answer the questions that follow:-
(a) How do the atomic radius of element X and Y compare
(b) (i) Using crosses (X) to represent electrons, draw the atomic structure of element Q
(ii) State the period and the group to which element Q belong
(c) (i) The ionic configuration of element G is 2.8 G forms an ion of the type G-1.
Indicate on the grid, the position of element G.
(ii) To which chemical family does element G belong?
(iii) State one use of element U
(iv) What is the nature of the compound formed between K and U
Date posted: October 15, 2019.
- Read the passage below and answer the questions that follow.(Solved)
Read the passage below and answer the questions that follow.
Modern science: A double-edged sword?
The human genome map is complete. This was the startling and fascinating news with which international scientists greeted the 21st Century. It meant that they had discovered and recorded every detail about the patterns of genes in our DNA. DNA is the substance of life in the cells of our bodies, and genes are the patterns in which this substance is
arranged. These patterns determine everything about our existence, from what we look like to how long we will live. Thus a full understanding of how these genetic patterns work was a very important scientific discovery for humankind.
Genetic mapping, however, was only one in a long series of scientific discoveries which have drastically changed our world and our lives over the past one hundred-odd years. These discoveries include internal combustion, aerodynamics, wireless communication and nuclear fission. Internal combustion means the production of heat energy by burning fuel
inside a closed chamber. Its discovery led to the manufacture of engines which move most vehicles today. It is easy to see that modern transport would be unimaginable without such machines. Still thinking of transport, the fastest and most efficient form of long-distance travel today is air travel. People had always dreamt of being able to fly but only a proper mastery of the
principles of aerodynamics – how objects stand and move within the atmosphere – made it possible to make flying machines. Today, aeroplanes fly to and from every corner of the world. The speeds at which aircraft move is also a wonder. When the supersonic concorde jet was used for air travel, one could have had breakfast in Nairobi, lunch in London and dinner in New York, across three continents, all on the same day. This is the power of modern science. Being able to send messages through space around the globe is another wonder of modern science. It was only in stories of fantasy that people could see and hear things many miles away. Today, this is reality, thanks to our scientific understanding of the behaviour of sound and vision waves. This understanding has lead to the invention of instruments such as the radio, television, computer and mobile phone. Today, one can watch events on a television set as they happen in any continent or even in space. Science seems to have overtaken magic.
A scientific development which is as frightening as it is fascinating is nuclear fission. Somewhere during the 1930s’ scientist found out that they could produce a tremendous amount of heat energy by splitting the cores of atoms, some of the smallest units of which matter is made. The heat produced by splitting these atoms was so great that it could burn
a whole city to ashes in a matter of minutes. Indeed, this is what sadly happened in Japan in 1945 during the Second World War. In order to win the war quickly, the Americans dropped two atomic bombs, made by nuclear fission, on two Japanese cities, Hiroshima and Nagasaki. The two cities were destroyed instantly and thousands of people were killed. The Japanese were so shocked that they surrendered immediately. Science had helped the Americans to win the war, but at what cost!
This brings us to a very important point about science. It has both benefits and dangers.
Our understanding, control and use of nature, which is what science is, can be used for good or for evil, Mastery of human genome, for example, can help in the control of
hereditary diseases. A clever rearrangement of a person’s genes may prevent them from inheriting breathing problems characteristic of asthma or uncontrollable bleeding caused by haemophilia. This would be science in the service of humankind. On the other hand, an evil scientist may manipulate human genes to create monsters. Scientist have managed to clone animals such as cattle, sheep and rabbits. A clone is an animal that is an exact genetic copy of another animal. Some scientists have even contemplated producing cloned human beings! What kind of human beings these will turn out to be; only time will tell.
Questions:
1. How did scientists greet the 21st century?
(2mks)
2. Name four scientific discoveries that have been made in the last one hundred years?
3. What according to the passage demonstrates the advantages of aerodynamics?
4. Mention one scientific discovery which is said to have overtaken magic.
5. Explain how an atomic bomb is made.
6. Why did the Americans drop atomic bombs in Hiroshima and Nagasaki?
7. How can scientific discoveries in the area of genetics benefit humankind?
8. What is the possible danger of the discoveries in genetic research?
9. Comment on the relevance of the title of the passage.
10. Explain the meaning of the following phrases as used in the passage
i) Is as frightening as it is fascinating.
ii) A clever rearrangement.
Date posted: October 15, 2019.
- Read the poem below and answer the questions that follow.(Solved)
Read the poem below and answer the questions that follow.
Sampan
Waves lap lap
Fish fins clap clap
Brown sails flap flap
Chop sticks tap tap
Up and down the long green river
Ohe! Ohe! Lanterns quiver
Willow branches brush the river
Ohe! Ohe! Lanterns quiver
Waves lap lap
Fish fins clap clap
Brown sails flap flap
Chop sticks tap tap
Questions:
1. Describe the rhyme scheme of the above poem.
2. Identify and illustrate any sound devices used in the poem.
3. Provide another word that is pronounced the same way as the ones provided below.
i) Key –
ii) One –
iii) Passed –
iv) Come –
v) Read
Date posted: October 15, 2019.
- Fill in the blank spaces below with the most appropriate words.(Solved)
Fill in the blank spaces below with the most appropriate words.
It was now time for 1....................who had a question or anything else to do so. At first nobody stood. 2. .............. seemed to be staring blankly in the air waiting for someone else to go first. Suddenly, somebody finally stood. "I have a suggestion," she said. "Let 3........... be given a chance to say 4................ We should not leave this meeting until this matter is resolved." Wangui suddenly gathered 5.................and spoke as tears flowed freely down her face 6. ...............she asked for forgiveness from those they had aggrieved. Right in front of her, was Paulo, the headboy. Before he could 7............, Wangui handed him the mobile phone they had been 8 ............. for in the dormitories. She hated the prospect of facing their ruthless principal, but she was 9. ..........that that was the right thing to do. The principal was not 10. ............. to learn that Wangui had had this phone all along.
Date posted: October 15, 2019.
- A shaded circle is in a square of length 20 cm. The diameter of the circle is equal to the length of the circle. Calculate...(Solved)
A shaded circle is in a square of length 20 cm. The diameter of the circle is equal to the length of the circle. Calculate the area of the unshaded part. Take π to be 3.14
A 400 cm²
B 86 cm²
C 314 cm²
D 714 cm²
Date posted: October 14, 2019.
- A school has 23 classes. Each class has 40 pupils. Each pupil paid sh 5 for repairs. How much was collected altogether?
A sh 2300
B sh...(Solved)
A school has 23 classes. Each class has 40 pupils. Each pupil paid sh 5 for repairs. How much was collected altogether?
A sh 2300
B sh 920
C sh 4600
D sh 4500
Date posted: October 14, 2019.
- How many pages are there in a book if 3/8 of the book has 45 pages
A 1 000
B 120
C 180
D 200(Solved)
How many pages are there in a book if 3/8 of the book has 45 pages
A 1 000
B 120
C 180
D 200
Date posted: October 14, 2019.
- Fifteen men take 9 days to dig a farm. How many more days will 9 men take to dig the same farm?
A 5 days...(Solved)
Fifteen men take 9 days to dig a farm. How many more days will 9 men take to dig the same farm?
A 5 days
B 15 days
C 2/3 days
D 6 days
Date posted: October 14, 2019.
- The marked price of a sewing machine is sh 3 585. A tailor bought it on hire purchase terms by paying a deposit of sh...(Solved)
The marked price of a sewing machine is sh 3 585. A tailor bought it on hire purchase terms by paying a deposit of sh 1 460 and 7 monthly instalments of sh 375 each. How much more than the marked price did he pay
A sh 4 085
B sh 500
C sh 2 125
D sh 700
Date posted: October 14, 2019.
- The 3/4 of a circle has a radius of 20 cm. What is thrice the perimeter of the figure ( take p = 3.14 )
A...(Solved)
The 3/4 of a circle has a radius of 20 cm. What is thrice the perimeter of the figure ( take π = 3.14 )
A 94.2 cm
B 31.4 cm
C 134.2 cm
D 402.6 cm
Date posted: October 14, 2019.
- A farmer ploughed 2/7 of his farm in the first week, 3/5 of the remaining in the second week and the rest during the third...(Solved)
A farmer ploughed 2/7 of his farm in the first week, 3/5 of the remaining in the second week and the rest during the third week. What fraction did he plough in the third week?
A 2/7
B 3/7
C 5/7
D 6/35
Date posted: October 14, 2019.
- A shopkeeper bought 9 tonnes of sugar and sold it in 100 kg bags. How many bags of sugar did he sell
A 9
B 900...(Solved)
A shopkeeper bought 9 tonnes of sugar and sold it in 100 kg bags. How many bags of sugar did he sell
A 9
B 900 000
C 900
D 90
Date posted: October 14, 2019.
- A trapezium has lengths of 30 m and 50 m respectively and a hypotenuse of 25 m. Find the area of the figure in hectares
A...(Solved)
A trapezium has lengths of 30 m and 50 m respectively and a hypotenuse of 25 m. Find the area of the figure in hectares
A 1 000 ha
B 0.6 ha
C 0.06 ha
D 0.1 ha
Date posted: October 14, 2019.
- Mora paid sh 320 for a cloth after getting a sh 40 discount. What is the percentage of the discount
A 40%
B 12.5%
C 11/1/9%
D...(Solved)
Mora paid sh 320 for a cloth after getting a sh 40 discount. What is the percentage of the discount
A 40%
B 12.5%
C 11/1/9%
D 14/2/7%
Date posted: October 14, 2019.
- Jane, James and Mary were to share sh 72 000 among themselves in the ratio 3:4:5 respectively. How much more did Mary get more than...(Solved)
Jane, James and Mary were to share sh 72 000 among themselves in the ratio 3:4:5 respectively. How much more did Mary get more than Jane?
A sh 3 000
B sh 1 800
C sh 1 200
D sh 2 400
Date posted: October 14, 2019.
- Which of the following is a right angle triangle
A 15 cm, 36 cm, 39 cm
B 0.3 cm, 0.4 cm, 0.6 cm
C 5 cm, 12...(Solved)
Which of the following is a right angle triangle
A 15 cm, 36 cm, 39 cm
B 0.3 cm, 0.4 cm, 0.6 cm
C 5 cm, 12 cm, 14 cm
D 4 cm, 5 cm, 7 cm
Date posted: October 14, 2019.
- The perimeter of Jima's square piece of land is 92 km. What is the area in hectares?
A 23 000 ha
B 52 900 ha
C 5...(Solved)
The perimeter of Jima's square piece of land is 92 km. What is the area in hectares?
A 23 000 ha
B 52 900 ha
C 5 290 000 ha
D 529 000 000 ha
Date posted: October 14, 2019.
- The bus fare from Nairobi to Mombasa was raised by 20%. What is the new fare if the old fare was sh 150?
A sh...(Solved)
The bus fare from Nairobi to Mombasa was raised by 20%. What is the new fare if the old fare was sh 150?
A sh 120
B sh 125
C sh 187.50
D sh 180
Date posted: October 14, 2019.