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100% REAL CHEMISTRY ANSWERS

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THEORY:
(1ai)Q and S (1aii)Q and T, S and U (1aiii) I. Q and S. II.by gaining electron is U. (1aiv) T (1av) S and U . (1bi) Electronegative is the tendency of an atom to gain electron and become negatively charge. (1bii) it increases across theperiod and decreasedown group.
(1biii) due to additional shell, it increases down the group and due to additional electron, it decreases across the group because the nuclei pull between the proton in the nucleus and the valence increases.
(1c.) (i)They have variable oxidation state (ii)They have the ability to form coloured ion (iii) They have the ability to form complex ion.
(1di) 2KClO32KCl+3O2 (1dii) it serve as a catalyst and makes the reaction to occur at a lower temperature and at a faster rate. (1diii) molar mass of KClO3=39+35.5+48=122.5g molar massof KCl=39+35.5=74.5g. Mass of the chloride produced (15*2*74.5)/(2*122.5),=9.122g
(2a)(i)?Boyle?s law state that the volume of a given mass of a gas is inversely proportional to the pressure . i.e V (alpha)1/p (2aii)V (alpha)1/p V= k/p, V1P1= V2P2 (2aiii)(1) it occurs at high temperature (2) also at low pressure(2aIV) (I) - gases are made up of molecules which arein constant random motion. -The particles do not attract each other -The total volume actually occupied bythe gas molecule is negligible comparedwith the volume of the container (II) Dalton law of partialpressure state that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressure of each constituent provided the gases would not chemical react together. i.e. PT= PA+ PB+PC+PD. (2b)(i) p - Condensation, Q- Freezing, R- sublimation (ii)I- Sublimation, II- Iodine molecule (2c)t1/t2= (square root of ) m1/m2. Rate of diffusion = vol/time RCH4= 80/20=4 RQ=50/25=2 RCH4/RQ= square root of) mQ/MRcH4 4/2=square root of) MQ/16 4/2= square root of) MQ/4 Square root of MQ= 4 x 4/2= 16/2=8.
(4ai) hybridization is the mixing or blending of two or more atomic orbitals to produce a new hybrid orbitals (4aii) SP^2 and SP^3 hybridization are exhited by carbon atom in propene (4aiii) (1) S-orbital is spherical, (2) P-orbital is dumb bell (4B) electrons are not free in diamond and its heldtogether by electostatic force of attraction whole in graphite, there are free electron (4c) CnH2n+2=> alkane, RCL=> monochloroalkane. (8a) k-metallic bondH2-covalent bond KH-covalent bond units which make upthe subsctance k-kilojoule H2-kilojoule KH-kilojoule (8bi) H20>H2>CH4 increasing order of boiling points (8bii) boiling points increase with the member of hydrogen bond. (8di) it reacts with base to form salt and water, it react with metall to form hydrogen gas (8dii) I-acidic II--basic III-acidic Iv-acidic
(3aI)An acid-base indicator is a weak organic acid or basewhich changes colour depending onthe hydrogen ion concentration of thesolution. (II)a suitable indicator is one which its PH value(range)falls within the end point PH of the resulting solution of the acid-base reaction. (III)(i)phenolpthalcim (ii)the end poin PH solution is alkaline(strong acid against base)
(3bi) zn+2Agno3-- zn (No3)2+2Ag. (3bii) redox reaction it involves oxidation and reduction processes.(3ci) caco3+2Hcl-- cacl2+co2+H2 increase the surfacearea of caco3. increase the concentration of Hcl.Heat. (3dii) a saturated solution cannot dissolve more solute at that temperature while an unsaturated solution can still dissolve more soluteat that temperature
3cii)increase in temperature increase the average kinetic energy of the reactant molecules and this leads to increase in the effective collisions of the molecules. (3di)solubility:this isa measure of the amount in moles of a solute that dissolves in idm^3 ofa solvent at a particular temperature in the presence of the undissolved solutes. can still dissolve more soluteat that temperature
3cii)increase in temperature increase the average kinetic energy of the reactant molecules and this leads to increase in the effective collisions of the molecules. (3di)solubility:this isa measure of the amount in moles of a solute that dissolves in idm^3 ofa solvent at a particular temperature in the presence of the undissolved solutes.
(3diii) 10cm3 of solution dissolved 0.06g of salt 1000cm3 of solution will dissolve0.06*1000/10=6.0g/dm3
(8ci) In balancing redox reactions and in naming inorganic compounds(IUPAC) (8cii)I->N2O,II->NO,III->N2O3 (8ciii)A drying agent absorbs moisture from a substance usually a gas while adehydrating agent removes water molecule from a substance e.g conc.H2SO4. Drying agent-->silica gel

OBJ:
1-10: CDAACDAADA
11-20: BABDDDBADD
21-30: CBCCCBCDBC
31-40: DCBCCDBCCD
41-50: DBBCCBBCBA.

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BIOLOGY ALTERNATIVE TO PRACTICAL ANSWERS

1(a)i Specie D
   ii because the bio-mes of organism give a more accurate picture of the feeding relationships .
 (b) A The secondary consumer
     B The primary consumer
     C The tertiary consumer
     D The producer

(d) Specie A - Fish
    specie B - consumer plankton
    specie C - hawk
    specie D - photosynthetic plankton
    specie A - Lizard
    specie B - Grasshopper
    specie C - hawks
    specie D - Trees


1di)For marine habitat
(a)phytoplankton
(B)crustaceans
(C)small fishes
(D)Large fishes

(1dii)A:shrubs
B:Insects
C:squirels
D:cats

 (e) the population of D will be decreased because A feeds on B which feeds on D .Therefore if A decrease then the number of B feeding on D will increase .


(4ai) D-tubual legation.
E-Vasectomy.
G-coil.
H-condom ..

(4aii)(I)ureter,
(II) Epidymis,
(III) testis
(iv:) pennis
(v) oviduct
(iv) minor tibiora (vii) vulva
(viii) uterus
(ix) ovary
(x) funnel of oviduct

(4aiii)(II) it stored sperm until matured

(III) production of sperm

(x) it serve as passenger for ova

(4bi)G-Metals,H- rubber.
(4bii)placed at the tip of the womb

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100% CORRECT C.R.S ESSAY ANSWERS

(10a) Paul admonished all christian to obey or to be subjected to constituted or governing authority. according to Paul.

- we must obey as law abiding citizens
-we must show respect for those in authority
-we are instituted by God for purpose of each and stability
-rulers are not out against good work or conduct but against bad conduct
-commendation awaits us for good conduct and punishment for bad conduct

(10b)
-good citizen should always maintain a clear conscience by pay tax and dues as at when due
-ay attention to all civic responsibilities
-shunning membership of secret cult

(5) love: God cares for man and love him and does not want man to perish. hence, he sent his son Jesus Christ as the lamb that carries away the sins of mankind. the love of God therefore is stronger than just a feeling of affection. God's love for man is also manifested daily in our lives. he provides for repentance and gives us the opportunity and freedom always to do that which is good.

Adultery: Jesus teaches us that if a man commit adultery with the wife of his neighbor both the adulteress shall be put death, on that adultery, Jesus also continues his teaching that if a man lies with his daughter-in-law, both of them shall be put to death, they have committed incest, their blood is upon them which means adultery is not accepted in Jesus preaching to his people.

Divorce: it means the legal ending of a marriage in a family or in another word, it is separation of a man and his wife.
According to Jesus teaching, in Matthew chapter 5, verse 22, in order to go straight to the point, Jesus was talking about the verse thirty two, that Jesus said on his wife. Saving the cause of fornication cause her to commit adultery and whosoever shall marry her that is divorced committed adultery. Which means as a child of God, we must do away from divorce.


1ai) In the second account of creation or Yahwist account of creation the main features was that man was created out of dust of the earth and after that breathed into his nostril and He gave man life and ask him to go into the world and multiply.


(1bi) Reproduction (1bii) using the nature to his own advantage


(6b)The parable teaches that our nieghour is anybody who needs our help. (ii) Christain should render help to others and do charity works. (iii) Religious office is not a criterion for salvation



100% CORRECT C.R.S OBJ ANSWERS

Verified C.R.K OBJ:
1-10: DDAABDBAAB
11-20: BBCCDBDACD
21-30: CCDADACBDC
31-40: BABCDABBCD
41-50: CBDDBDDBDC


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100% CORRECT MATHEMATICS OBJ ANSWERS
01-10 BCAABABBDA
11-20 ADAABACABD

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