Kombolcha general and preparatory school

08/10/2021

anrseb.gov.et, Amhara National Regional State Education Bureau, Amhara Education Bureau, Bahirdar,East Gojjam, Weste Gojjam, Agew Awi,South Gondar,Central Gondar,North Wollo,Wag Hemra,North Shewa,Desse,Wollo Oromo, South Wollo, Weste Gondar

25/09/2021

25/09/2021

17/05/2020

ቀን 9/ 09/ 2012 ዓ/ም

ለ8ኛ እና 12ኛ ክፍል ተማሪዎች !

የአዲስ አበባ ከተማ አስተዳደር ትምህርት ቢሮ በ2012 የትምህርት ዘመን ለ8ኛ ክፍል በ2 ቋንቋዎች እና ለ12ኛ ከፍል ተማሪዎች ሞዴል ፈተና በማዘጋጀት በቢሮዉ የቴሌግራም ቻናል https://t.me/wwwAddisAbabaeducationbureau ተደራሽ ለማድረግ ዝግጅቱን ያጠናቀቀ በመሆኑ እና የሞዴል ፈተናዎቹ ከማክሰኞ ማለትም ከግንቦት 11/9/2012 ዓ/ም ጀምሮ ቢሮዉ ባወጣዉ የሞዴል ፈተና የጊዜ ሰሌዳ መሰረት የሚሰጥ ሰለሆነ ተማሪዎች የቴሌግራም ቻናላችንን በመከታተል የሞዴል ፈተናዉን በአግባቡ እንድትወስዱ እና እራሳችሁን እንድታዘጋጁ እንጠይቃለን፡፡

ፈተናዉ በወጣዉ መርሃ ግብር እና ሰሃት መሰረት በቢሮዉ ቴሌግራም ላይ ለየክፍል ደረጃዉ የሚቀርብ ሲሆን የሞዴል ፈተና መልስንም ፈተናዉ ከተጠናቀቀ በሃላ በምናወጣዉ ማስታወቂያ መስረት ተደራሽ የሚሆን መሆኑን እንገልጻለን፡፡

ማሳሰቢያ

የሞዴል ፈተናዉ እራሳችሁን እንድትፈትሹበት ብቻ የቀረበ ነዉ፡፡

መረጃዎችን በፍጥነት ለማግኘት የዩቲዩብ ፣ የቴሌግራም ፣ የፊስቡክ እና የትዊተር ገፃችንን ሰብስክራይብ ያድርጉ!

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እንራራቅ፣ እንታጠብ እንዲሁም አንጨባበጥ፡፡

01/05/2020

sample model exam
KOMBOLCHA GENERAL AND HIGHER EDUCATION PREPARATORY SECONDARY
SCHOOL CHEMISTRY QUESTIONS FOR GRADE 12
PHYSICAL CONSTANTS
 Avogadro’s No = 6.02 x1023 mole
 Mass of electron = 9.11x10-31kg
 Gas constant (R) = 8.314 J/mol K = 0.082 L.atm/mol. K
 Planks constant (h) = 6.626x10-34 JS/photons
 Faraday’s constant (F) = 96500C/mol
 Ryberg’s constant (RH) = 2.18x10-18J
 Velocity of light (C) = 3x108 m/s
Atomic number (Z) and mass number (A)
Element H He Li Be B C N O F Ne
A 1 4 7 8 11 12 14 16 19 20
A Na Mg Al P K
23 24 27 31 39
Element H He Li Be B C N O F Ne
Z 1 2 3 4 5 6 7 8 9 10
Z Na Mg Al P K
11 12 13 15 19

Element V Cr Mn Fe Co Ni Cu Zn Ag Au
A 51 52 55 56 59 58.7 64 65 108 197
A Hg Ti Kr Sc
201 48 84 45
Element V Cr Mn Fe Co Ni Cu Zn Ag Au
Z 23 24 25 26 27 28 29 30 47 79
Z Hg Ti Kr Sc
80 22 36 21

CHOOSE THE CORRECT ANSWER FROM THE ALTERNATIVES
1. Among the following SI units which one is not basic?
A. Kelvin B. Candela C. Second D. Atmosphere
2. Which one of the following measurement contains four significant figures?
A. 0.06 B. 5.004 C. 0.0009 D. 0.0027
3. Which one of the following is NOT true about random errors?
A. They affect the precision of the result
B. They vary in magnitude and direction
C. They cause the data to be scattered more or less symmetrically around the main value
D. They lie only in one direction for a set of measurements
4. The agreement or closeness among several measurements of the same quantity is
A. Accuracy B. precision C. systematic error D. random error
5. The general statement that summarizes facts that come from many experiment is
A. Observation B. hypothesis C. theory D. law
6. Which one of the following EMR has the lowest wave length?
A. γ-ray B. radio wave C. micro wave D. X-ray
7. What is the frequency a radiation that has wave number of 1.7x106m-1?
A. 2.3x1014s-1 B. 8.2x1014s-1 C. 5.1x1014s-1 D. 12.3x1014s-1
8. Which one of the following molecule violet octet rule?
A. NF3 B. NH3 C. NO2 D. H2O
9. Among the following molecules which one has sp3d2 hybrid orbitals?
A. SCl6 B.CH4 C. BF3 D. PCl5
10. Which one of the following molecules is not diamagnetic?
A. O2-2 B. N2 C. O2 D. F2
11. 1g of powdered magnesium reacts faster than 1g of magnesium ribbon in 2 molar HCl
solution is due to
A. surface area B. concentration C. temperature D. catalysts
12. Which one has the highest bond order? (Atomic number: F= 9, O= 8, Be= 4, N= 7)
A. N2 B. F2 C. O2 D. Be2
13. The rate of a reaction may be expressed by R=K[A]x[B]y. The following results were
obtained during the rate determination experiment.
Experiment [A] in mol/L [B] in mol/L Rate in mol/LS
1 1.2x10-3 4.4x10-3 1.2x10-2
2 2.4x10-3 4.4x10-3 2.4x10-2
3 1.2x10-3 1.1x10-3 3x10-3
A. Rate= k[A]2[B] B. Rate= k[A][B] C. Rate= k[A][B]2 D. Rate= k[A]2[B]2
14. Which one of the following compounds contains both ionic and covalent bonds?
A. AlCl3 B. Mg3N2 C. NaCN D. NaCl
15. Which one of the following intermolecular forces in covalent compound is the strongest?
A. Hydrogen bonding C. induced - dipole
B. Dipole- dipole D. London force
16. Among the following substances which one has the largest bond angle?
A. C4H10 B. C2H2 C. NH3 D. H2O
17. The intensity of a radiation is related to its
A. Wave length B. frequency C. wave number D. amplitude
18. Which one of the following ions has the smallest radius?
A. 13Al3+ B. 12Mg2+ C. 11Na+ D. 9F-
19. The element neon has two isotopes, 2010Ne and 2110Ne. If the relative atomic mass is 20.18
amu, what is the percentage abundance of 2010Ne?
A. 20% B. 21% C. 82% D. 75%
20. The maximum number of electrons in an atom posses a quantum number n=5, լ=2, mլ= -1
A. 2 B. 4 C. 6 D. 10
21. Which element would you expect has the highest second ionization energy (IE2)
A. Al B. 12Mg C. 11Na D. cannot be determined
22. Which one of the following set of quantum number is NOT permissible?
A. n =3, լ=2, mլ=1, ms=+􀍳
􀍴 C. n =4, լ=3, mլ=1, ms= - 􀍳
􀍴
B. n =2, լ=1, mլ=0, ms= - 􀍳
􀍴 D. n =2, լ=0, mլ=1, ms=+􀍳
􀍴
23. Calculate the energy of transition from energy level 3 to energy level 2 in hydrogen
emission spectrum? (RH = 2.18x10-18 J)?
A. 5.45x10-19 J B. – 5.45x10-19 J C. – 2.42x10-19 J D. - 3.03x10-19 J
24. For zero order reaction which one of the following factor does not affect the rate of
reaction?
A. Surface area B. temperature C. presence of catalysts D. concentration
25. Which one of the following chemical is manufactured by Ostwald process?
A. Ammonia B. sulfuric acid C. hydrochloric acid D. nitric acid
26. Which one of the following radioactive emission from the nucleus of an atom would
change the mass of an atom?
A. γ- emission B. β- emission C. α- emission D. x- ray
27. One among the following quantum numbers determines the orientation of orbitals in
space?
A. principal quantum number C. azimuthal quantum number
B. magnetic quantum number D. spin quantum number
28. Which one of the following is NOT the properties of ionic compounds? Ionic
compounds:
A. Contain molecules as fundamental units
B. Conduct electricity in molten or aqueous
C. Soluble in polar solvents
D. Have relatively high melting point and boiling point
29. Which one of the following molecule has linear shape?
A. IF2- B. XeF2 C. IO2F2- D. ICl4-
30. The number of resonance structures for CO32- are
A. 9 B. 6 C. 3 D. 2
31. In the simple decomposition reaction: AB (g) → A (g) + B (g), rate =k [AB]2 and K=
0.2 L/mol.s. How long will it for [AB] to reach one-third of its initial concentration of
1.5M?
A. 4.3s B. 7s C. 10.2s D. 13.4s
32. In which order/s the half-life (t1/2) is independent of the initial concentration of the
reactant?
A. Zero order B. 1st order C. 2nd order D. zero and 1st order
33. For the following reaction: 2H2S (g) + O2 (g) ↔ 2S (g) +2H2O (g), what would happen
to [O2] if H2S is removed?
A. Decreased B. remains the same C. increases D. has no effect
34. Consider the reaction: 2SO2 (g) + O2 (g) ↔ 2SO3 (g) + heat, which of the following
condition increases the concentration of SO3?
A. Increasing temperature C. adding catalyst
B. Decreasing pressure D. removing SO3 as soon as formed
35. Which of the following factor does not influence the position of equilibrium?
A. Catalysts B. temperature C. concentration D. pressure for gaseous reactants and
products
36. The greatest increase in the rate for the reaction between A and B with rate
R = K [A][B]2 will be caused by
A. Doubling the concentration of A C. doubling the concentration of B
B. Tripling the concentration of A D. lowering temperature
37. For the reaction C (s) + CO2 (g) ↔ 2CO (g), the partial pressure of CO2 and CO are 2
atm and 4 atm respectively at equilibrium. What is the value of KP for this reaction?
A. 4 atm B. 0.5 atm C. 8 atm D. 32 atm
38. In which case Kc and Kp are equal?
A. Δn = 1 B. Kc < RT C. Δn = 0 D. T=R
39. Which of the following particle was discovered by the cathode ray experiment?
A. Electron B. neutron C. nucleus D. proton
40. At 4250c, Kp = 4.18x10-9 for the reaction 2HBr (g) ↔ H2 (g) + Br2 (g), in which direction
the equilibrium shifts when 0.2 atm HBr (g), 0.01 atm H2 (g) and 0.01 atm Br2 (g) are
introduced to a reaction vessel?
Right B. left C. neither direction D. cannot be determined

01/05/2020

KOMBOLCHA GENERAL AND HIGHER EDUCATION PREPARATORY SECONDARY SCHOOL
BIOLOGY QUESTIONS FOR GRADE 11
I. write true if the statement is correct, and false if the
statement is in correct
1. Apoenzemes are small protein particles that combine with cofactors to make active enzymes.
2. Activators are substance that are able to remove inhibitors.
3. The effectiveness of non-competitive inhibitors is affected by the number of substrate
molecules.
4. The word cell was first coined by Anton Van Leeuwen Hoek.
5. The surface area to volume ratio of a cell increases as it becomes bigger.
6. Glycolysis is the only way of producing ATP in the absence of oxygen in aerobic respiration.
II Mach column "A" with column "B"
"A"
1. Exocytosis
2. Endocytosis
3. Fick's law
4. Pinocytic vesicle
5. Davson-Daneilli model
6. Fluid mosaic-model
"B"
A. Phospholipid bilayer sandwiched
between two protein layers
B. The sac formed during cell drinking
C. Bulk transport of material out of cells
D. Proteins are dispersed and embedded
in phospholipid bilayer
E. Mass transport of material in to cells
F. Rate of diffusion of molecule is
inversely related to thickness of The
membrane
III. Choose the correct answer and write the letter of the choice
1. In end product inhibition of a metabolic path way, the activity of the first enzyme is
inhibited by the:
A. first product of the pathway C. intermediate product of the pathway
B. last product of the pathway D. None of the above
2. Enzymes are used in most metabolic processes, which enzyme is used to fix CO2 in C3
photosynthesis?
A. PEP Carboxylase B. Helicase C. ATPase D. Rubisco
3. Which of the following processes can proceed normally whether oxygen is present or
absent?
A. Electron transport chain C. Glycolysis
B. Citric acid cycle D. Oxidative phosphorylation
KOMBOLCHA GENERAL AND HIGHER EDUCATION PREPARATORY SECONDARY SCHOOL
BIOLOGY QUESTIONS FOR GRADE 11
4. Starting with one molecule of glucose the net production of glycolysis are:
A. 2NADH, 2pyruvate and 2ATP C. 2FADH, 2pyruvate and 2ATP
B. 2NADH, 2FADH and 2ATP D. 4NADH, 2pyruvate and 2ATP
5. In aerobic respiration of cells, in which cellular parts does the kreb's cycle takes place?
A. Chloroplasts B. Mitochondria C. Nuclei D. Lysosomes
6. Which of the following organelles are more abundant in active cells such as muscle cells
of human heart?
A. Lysosomes B. Mitochondria C. Chromosomes D. B & C are correct
7. Which of the following pairs are both organelles concerned with energy transformation?
A. Nucleus and nucleolus C. Chloroplast and vacuole
B. Mitochondria and nucleus D. Chloroplast and mitochondria
8. Which of the following process of photosynthesis does not require light to takes place?
A. Carbon fixation C. Reduction of NADP
B. ATP formation D. Splitting of water
9. Which of the following electron carries are also proton pumps in respiration?
A. Ubiquinone C. NADPH dehydrogenase
B. NADH dehydrogenase complex D. A & B are correct
10. Which unit is best to use for measuring the smallest cells and organelles
A. Micrometre B. Milliliter C. Millimetre D. Nanometre
11. If a suspension of a mixture of cellular organelles is spun in a centrifuge which organelles
settle down to the bottom first?
A. Mitochondria B. Nuclei C. Chloroplasts D. Ribosomes
12. During chemiosmosis what substance diffuse from inter membrane space to the
mitochondrial matrix?
A. Water molecules B. ATP C. Electrons D. Protons
13. Which of the following is not the stage in cellular respiration?
A. Calvin cycle B. Glycolysis C. Electron transport D. Kreb cycle
14. In which of the following solution the water potential is more negative when compared
with the water potential of a cell?
A. Isotonic B. Hypertonic C. Hypotonic D. None of the above
15. If 6 cells fit across 24 stage micro meter division that corresponds to 36 eye piece
graticule division and each stage micro meter division = 5μm, the diameter of each cell
is:’
A. 30μm B. 30mm C. 20μm D. 20mm
16. Where does the light dependent reaction of photosynthesis occur in the chloroplast?
A. In thylakoid membrane C. In all parts of the chloroplast
B. In the fluid stroma D. In the fluid matrix
17. In which process is ATP can be generated during short distance high speed running?
A. Aerobic respiration C. Anaerobic respiration
B. Chemiosmosis D. Kreb's cycle
KOMBOLCHA GENERAL AND HIGHER EDUCATION PREPARATORY SECONDARY SCHOOL
BIOLOGY QUESTIONS FOR GRADE 11
18. Which of the following process could not takes place in the link reaction of cellular
respiration?
A. Decarboxylation C. Acetyl CoA formation
B. Dehydrogenation D. ATP formation
19. Why photosynthesis is impossible at a depth of 800 meter in water? Because:
A. It is very cold. C. Light could not reach to this distance.
B. It is too hot. D. Only the blue light penetrates this distance
20. Which of the following is not true about photosystem II?
A. It is most active with wave length of P680.
B. It passes its excited electron to Ferredoxin.
C. The energy lost from its excited electron reduces NADP
D. It replenish its lost electron from photosystem I.
21. Where does calvin cycle takes place in C4 photosynthesis?
A. Mesophyll cells C. Guard cells
B. Bundle sheath cells D. All of the above
IV. Fill in the blank space with the correct answer
1. ------------------is a process in aerobic respiration that produce a small amount of ATP in the way
that does not involve ATP synthase?
2. In anaerobic respiration animal cell convert glucose molecule in to-------------and-----------
3. In low concentration of CO2 Rubisco binds with oxygen and produce CO2, and produce one
molecule of GP & phosphoglycolate, the process is known as------------------
4. To pass through the plasma membrane by simple diffusion the particle must be---------------------,
-------------------and------------------------
V. Write the correct answer
1. Write three conditions that makes C4 photosynthesis most effective?
2. What are prokaryotic cells?
3. How is ATP adapted to its energy transfer role in cells? Write at least two reasons:

01/05/2020

General aptitude

30/04/2020

Try to do by ur self before looking at the answers

29/04/2020

KOMBOLCHA GENERAL AND HIGHER EDUCATION PREPARATORY SECONDARY SCHOOL BIOLOGY QUESTIONS FOR GRADE 11

I. write true if the statement is correct, and false if the statement is in correct

1. Apoenzemes are small protein particles that combine with cofactors to make
active enzymes.
2. Activators are substance that are able to remove inhibitors.
3. The effectiveness of non-competitive inhibitors is affected by the number of
substrate molecules.
4.The word cell was first coined by Anton Van Leeuwen Hoek.
5.The surface area to volume ratio of a cell increases as it becomes bigger.
6. Glycolysis is the only way of producing ATP in the absence of oxygen in
aerobic respiration.

II Mach column "A" with column "B"

"A"
1.Exocytosis
2.Endocytosis
3.Fick's law
4.Pinocytic vesicle
5.Davson-Daneilli model
6.Fluid mosaic-model

"B"
A.Phospholipid bilayer sandwiched between two protein layers
B.The sac formed during cell drinking
C.Bulk transport of material out of cells
D.Proteins are dispersed and embedded in phospholipid bilayer
E.Mass transport of material in to cells
F.Rate of diffusion of molecule is inversely related to thickness of The
membrane


III. Choose the correct answer and write the letter of the choice
1.In end product inhibition of a metabolic path way, the activity of the first
enzyme is inhibited by the:
A. first product of the pathway
B. last product of the pathway
C . intermediate product of the pathway
D. None of the above
2.Enzymes are used in most metabolic processes, which enzyme is used to fix CO2 in C3 photosynthesis?
A. PEP Carboxylase
B. Helicase
C. ATPase
D. Rubisco
3.Which of the following processes can proceed normally whether oxygen is present or absent?
A.Electron transport chain
B.Citric acid cycle
C. Glycolysis
D. Oxidative phosphorylation
4.Starting with one molecule of glucose the net production of glycolysis are:
A.2NADH, 2pyruvate and 2ATP
B. 2FADH, 2pyruvate and 2ATP
C.2NADH, 2FADH and 2ATP
D. 4NADH, 2pyruvate and 2ATP
5.In aerobic respiration of cells, in which cellular parts does the kreb's cycle
takes place?
A. Chloroplasts
B. Mitochondria
C. Nuclei
D. Lysosomes
6.Which of the following organelles are more abundant in active cells such as
muscle cells of human heart?
A.Lysosomes
B. Mitochondria
C. Chromosomes
D. B & C are correct
7.Which of the following pairs are both organelles concerned with energy
transformation?
A. Nucleus and nucleolus
B. Chloroplast and vacuole
C.Mitochondria and nucleus
D. Chloroplast and mitochondria
8.Which of the following process of photosynthesis does not require light to takes place?
A. Carbon fixation
B. Reduction of NADP
C. ATP formation
D. Splitting of water
9.Which of the following electron carries are also proton pumps in respiration?
A.Ubiquinone
B. NADPH dehydrogenase
C.NADH dehydrogenase complex
D. A & B are correct
10.Which unit is best to use for measuring the smallest cells and organelles
A.Micrometre
B. Milliliter
C. Millimetre
D. Nanometre
11. If a suspension of a mixture of cellular organelles is spun in a centrifuge
which organelles settle down to the bottom first?
A. Mitochondria
B. Nuclei
C. Chloroplasts
D. Ribosomes
12.During chemiosmosis what substance diffuse from inter membrane space to
the mitochondrial matrix?
A. Water molecules
B. ATP
C. Electrons
D. Protons
13.Which of the following is not the stage in cellular respiration?
A.Calvin cycle
B. Glycolysis
C. Electron transport
D. Kreb cycle
14.In which of the following solution the water potential is more negative when
compared with the water potential of a cell?
A.Isotonic
B. Hypertonic
C. Hypotonic
D. None of the above
15.If 6 cells fit across 24 stage micro meter division that corresponds to 36 eye
piece graticule division and each stage micro meter division = 5µm, the
diameter of each cell is:’
A.30µm
B. 30mm
C. 20µm
D. 20mm
16.Where does the light dependent reaction of photosynthesis occur in the
chloroplast?
A.In thylakoid membrane
B. In all parts of the chloroplast
C.In the fluid stroma
D. In the fluid matrix
17.In which process is ATP can be generated during short distance high speed
running?
A. Aerobic respiration
B. Anaerobic respiration
C.Chemiosmosis
D. Kreb's cycle
18.Which of the following process could not takes place in the link reaction of
cellular respiration?
A.Decarboxylation
B. Acetyl CoA formation
C.Dehydrogenation
D. ATP formation
19.Why photosynthesis is impossible at a depth of 800 meter in water?
Because:
A.It is very cold.
B. Light could not reach to this distance.
C.It is too hot.
D. Only the blue light penetrates this distance
20.Which of the following is not true about photosystem II?
A.It is most active with wave length of P680.
B.It passes its excited electron to Ferredoxin.
C.The energy lost from its excited electron reduces NADP
D.It replenish its lost electron from photosystem I.
21.Where does calvin cycle takes place in C4 photosynthesis?
A.Mesophyll cells
B. Guard cells
C.Bundle sheath cells
D. All of the above

IV. Fill in the blank space with the correct answer
1.------------------is a process in aerobic respiration that produce a small amount of ATP in the way that does not involve ATP synthase?
2.In anaerobic respiration animal cell convert glucose molecule in to-------------and-----------
3.In low concentration of CO2 Rubisco binds with oxygen and produce CO2, and produce one molecule of GP & phosphoglycolate, the process is known as------------------
4.To pass through the plasma membrane by simple diffusion the particle must be---------------------, -------------------and------------------------

V. Write the correct answer
1.Write three conditions that makes C4 photosynthesis most effective?
2.What are prokaryotic cells?
3.How is ATP adapted to its energy transfer role in cells? Write at least two reasons: