FINAL REVISION .
1) Adding dil. hydrochloric acid to substance (X), a salt solution (Y) is formed and after a period of time sodium hydroxide is added to the products forming a precipitate, which of the following is correct for the substance (X), the salt solution and the precipitate respectively?
Choice Substance (X) The
2) By using the following diagram:
Which of the following identifies two of the substances (1) : (4)?
a) (1) : Ethanol (2) : Ethyne
b) (2) : Propene (3) : Hydrogen bromide
c) (3) : Bromine water (4) : Bromopropane
d) (1) : Ethanol (4) : 1,2- dibromoethane.
3) A secondary alcohol can be obtained from the reduction of....
a) C2H5COOH.
b) (CH3)2CHCHO.
c) CH3CH2OCH3.
d) CH3COC2H5
4) In the following reaction:
XYO3 + HSO4 → YO2 + XSO4 + H2O
If the element [X] its alloy is used for a medical purpose, element [Y] Its alloy is used in the aircraft Industry. Which of the following can be X, Y?
a) X: Ti , Y: Al
b) X: Fe , Y: Al
c) X:Fe . Y:Ti
d) X:Ti , Y:Fe
5) Number of moles of nitrogen gas resulted from passing 12 F in molten magnesium nitride = ………… mol
a) 1.1
b) 3.2
c) 2
d) 3.1
Acetaldehyde (1) (2)
6) Alloy steels contains elements such as manganese and tungsten , formed by mixing tungsten with steel, This alloy is considered from …………
a) Interstitial alloy and substitutional alloy
b) Substitutional alloy only.
c) Interstitial alloy and intermetallic alloy.
d) Intermetallic alloy only.
7) Each of the following takes place during discharging the lead accumulator except ……………
a) lead (I) sulphate is deposited at each of the cathode and the anode
b) the density of the used electrolyte decreases
c) the accumulator acts as an electrolytic cell.
d) Pb4+ is being reduced to Pb2+
8) Where one mole of the compound (B) contains 12 moles of atoms...The compounds (A), (b) and (C) are:
a) (A) is 2- bromopropane (B) is isopropyl alcohol (C) is acetone
b) (A) is 2- bromopropane (B) is propyl alcohol (C) is acetic acid.
c) (A) is ethyl chloride (B) is ethyl alcohol (C) is acetic acid.
d) (A) is ethyl chloride (B) is ethyl alcohol (C) is acetaldehyde.
9) In the opposite diagram :
Cell (1) : Contains molten sodium chloride.
Cell (2) : Contains aqueous solution of sodium chloride
An electrolysis process is made for both of them, the substances formed at the electrodes (X , Y , Z and L) are ...................
10)The following scheme represents the steps of obtaining meta- bromobenzoic acid from benzene:
Benzene (2) (4) (��) ሮ (��) ሮ (��) ሮ Meta – bromobenzoic acid
Which of the following identifies two out of the five substances (1):(5)?
a) (1) : CH3Cl\AlCl3 , (2): C6H5Cl
b) (2) : C6H5CH3 , (3): Conc. H2SO4
c) (3) : O2 . (4): C6H5COOH
d) (4) : C6H5COOH , (5): HBr
11)At the end of the experiment to purify copper from impurities, it was found that: metal (X) dissolves as ions, but does not deposited at the cathode, and metal (Y) deposit as solid at the bottom, so the reduction potentials are arranged as follows:
a) (X) > (Cu) > (Y).
b) (X) > (Y) > (Cu).
c) (Y) > (Cu) > (X)
d) (Cu) > (X) >(Y).
12)When electrolyzing molten AgCl using graphite electrodes:
a) The number of evolved Cl2 molecules is twice the number of silver atoms deposited.
b) The number of evolved CI2 molecules is half the number of silver atoms deposited
c) Chlorine evolved at the cathode and silver precipitates at the anode.
d) The mass of the cathode increases, the mass of the anode decreases, and the concentration of the molten remains constant.
13)A 1.3 g sample of Ca(OH)2 and CaCl2 was titrated against a 0.2 M solution of HCl. The complete reaction occurred after the addition of 22 mL of acid. To the nearest integer, what is the percentage of CaCl2 in the sample? [Ca=40 , O=16 , H=1 ,Cl=35.5]
a) 12.54 %
b) 80 %
c) 87.46 %
d) 20 %
14)When dilute HCI is added to solid salt has a chemical formula (X) a gas evolves which forms with wet paper by (Y2B) solution a black ppt. The anion (Y) is ..............
a) CH3COO -
b) S2-
c) SO32-
d) HCO3-
15)The opposite ester is produced from the reaction of:
a) ethanol with butanoic acid.
b) propanol with propanoic acid
c) butanol with ethanoic acid
d) propanol with ethanoic acid
16)If you have two salt solutions (A) and (B) when silver nitrate solution is added to both of them, separately, it is observed that:
White ppt. is formed which turn black by heat with salt solution (A).
White precipitate is formed which soluble in ammonia solution with salt solution (B)....So the anions of the two salts (A) and (B) are
a) (A): Br- , (B): S2O32-
b) (A) : SO32- . (B) : Cl-
c) (A): SO32- , (B) : Br-
d) (A): Cl- , (B): S2O32-
17)In the following equilibrium reaction :
2NO2(g) ⇌ N2O4(g) , (KP = 20)
The value of Kp for decomposition of 2 mol of N2O4 equals .... ...............
a) 40
b) 25 x 10-3
c) 2.5 x 10-3
d) 400
18)what percentage of chloroacetic acid molecules are not dissociated in a 0.12 M aqueous solution at 25∘C? The dissociation constant ��a of chloroacetic acid is 1.4×10-3
a) 10.8 %
b) 98 %
c) 70.4 %
d) 89.2 %
19)How many methyl groups are found in product of the reaction of 1- propanol with a hydrogen halide ?
a) 1
b) 2
c) 3
d) 4
20)On performing a reaction of active metal (X) with strong mineral acid (Y), What is the modification which can be performed to make the reaction occurs in a shorter time?
a) Increasing the volume of solvent during preparation of the acid with the same amount of solute
b) Decreasing the volume of solvent during preparation of acid with the same amount of solute.
c) Decreasing the reaction temperature
d) Increasing the volume of the container
21)(A), (B) and (C) are 3 compounds, on adding (A) to the compound (C) a food flavors produced. and on adding sodium hydroxide to (B) or (C) a reaction occurs while on adding it to (A) no reaction
Occurs then the three compounds are:
a) (A): alcohol (B): phenol (C): acid.
b) (A): phenol (B): alcohol (C) : acid
c) (A): acid (B): alcohol (C): phenol
d) (A): acid (B): phenol (C): alcohol
22)The following reaction has two equilibrium constant values at two different temperatures:
A2(g)+ B2(g) ⇌ 2AB(g) Kc=50 at 448 °C
A2(g)+ B2(g) ⇌ 2AB(g) Kc=67 at 850 °C
The concentration of B2 can be decreased by:
a) Heating
b) adding AB.
c) removing A2.
d) Cooling.
23) (A) and (B) are two aromatic organic compounds, the molecular formula of the compound (A) is C6H6O and the compound (B) is C7H6O3 each of the two compounds react with
a) sodium hydroxide.
b) sodium carbonated
c) Hydrochloric acid
d) ethyl alcohol
24)Alcohol (X) is oxidized forming an organic acid its molar mass equals 88 g/mol , what is the molecular formula of the alcohol (X)? [C=12 , H= 1 , O = 16]
a) CH3CH2CH(OH)CH3
b) CH3CH2CH2CH2CH2OH
c) CH3CH2CH2CH2OH.
d) CH3CH2CH(OH)CH2CH3
25)Which of the following, when reacting with iron, changes the number of unpaired electrons in iron?
a) HNO3(aq)
b) H2SO4(aq)
c) HCl(aq)
d) S(s)
26)What is the product of the alkaline hydrolysis (using excess sodium hydroxide solution) of C15H31COOC16H33?
a) C15H31ONa , C16H33COONa.
b) C15H31OH , C16H33COONa.
c) C15H31COONa , C16H33COONa.
d) C15H31COONa , C16H33OH
27)In which of the following galvanic cells the reduction potential of an electrode in a half-cell equals the cell potential by the negative sign?
a) The cell whose cathode is standard hydrogen electrode
b) The cell whose anode is standard hydrogen electrode.
c) The cell whose anode is Zinc and whose cathode is Copper.
d) The cell whose anode is Magnesium and whose cathode is Silver.
28)From the following graph: Which of the following choices is correct ?
a) Element (W) is less density than element (Z).
b) Element (Y) is less density than (Z).
c) Element (W) has lower ionization potential than (X)
d) Element (Y) has lower ionization potential than (X).
29)From the following diagram
Which of the following choice is correct ?
a) Compound (A) does not cause effervescence on adding sodium carbonate to it.
b) Compound (B) forms acetamide on ammonolysis of it
c) Compound (A) removes the violet colour of acidified potassium permanganate
d) Compound (B) removes the violet colour of acidified potassium permanganate
30)Which of the following processes occurs to the salt formed form the reaction of dibasic aliphatic acid with iron respectively to produce iron?
a) Oxidation – reduction - thermal decomposition
b) Thermal decomposition - oxidation- reduction.
c) Reduction -oxidation - thermal decomposition
d) Thermal decomposition - reduction – oxidation
31)A transition element [X] located in period [n], which of the following expresses the electronic configuration of the [X] ion at its maximum oxidation state?
a) ns2 (n-1) dn+1
b) ns0 ndn+1
c) (n-1) s2 ,(n-1) p6
d) ns2 np6
32)All the following are correct except:
a) (D) obeys general formula CnHnCln
b) (C) can react by addition & substitution
c) (A) turns milky on passing carbon dioxide for long time.
d) 1 mole of (B) can remove the color of 2moles of bromine in CCl4
33)What Is the IUPAC name of C6H5CH2CH(OH)CH3 ?
a) propyl alcohol benzene
b) 2-propyl-1- benzene
c) 3-phenyl-2- propanol
d) 1-phenyl-2- propanol
34) The following table represents reduction potential for four elements (A , B , C and D).
Which of the previous metals can be used as a scarifying electrode for another element?
a) C for A.
b) C for D.
c) B For A
d) A for B.
35)Which of the following is correct about the solution obtained by mixing equal volumes of KOH and H3PO4 solutions, each with a concentration of 2 M?
a) The obtained solution will be acidic
b) The obtained solution will be alkaline.
c) The concentration of the obtained solution will be 4 M.
d) The obtained solution will be neutral.
36)Compound (X) contains an ester group, the mass percentage of oxygen in it is 27.6 % , what are the products of the acid hydrolysis of (X)? [C=12 , H =1 , O = 16]
a) 1- butanol and ethanoic acid.
b) Ethanol and propanoic acid
c) Methanol and methanoic acid
d) 2-propanol and butanoic acid
37)If you know that (C) is one of the of iron salts, which of the following choices is suitable for identifying the name of the salt C in practice?
a) Adding BaCl2(aq) to part of the salt solution and then adding the ammonia solution to the remaining part
b) Adding (CH3COO)2Pb(aq) to part of the salt solution and then add MgSO4(aq) to the remaining part.
c) Adding ammonia to part of the salt solution, then adding MgSO4(aq) the remaining part.
d) Adding (CH3COO)2Pb(aq) to part of the salt solution and then add BaCl2(aq) to the remaining part.
38)Which of the following causes an increase the pH of the SHE solution?
a) Connecting it with silver half-cell.
b) electrons flow in external circuit towards SHE
c) Connecting it with an in electrode less active than hydrogen.
d) Anions of salt bridge move toward SHE.
39)Which of the following expresses the processes required to obtain meta-nitrotoluene from benzoic acid?
a) neutralization - dry distillation nitration - nitration – alkylation.
b) dry distillation –- nitration - alkylation
c) neutralization – dry distillation - alkylation –nitration
d) dry distillation - alkylation - nitration
40)According to the following of the ionization of pure water:
2H2O(l) ⇌ H3O+(aq) + OH-(aq)
Adding drops of NaOH solution to pure water ……………..
a) Increases both pH value and [H3O+].
b) Decreases pH value and increases [H3O+].
c) Increases pH value and decreases [H3O+]
d) Decreases both the pH value and [H3O+].
41)(X, Y, Z) three sparingly soluble salts in water ammonia solution was added to each of them, so the salt (X) takes 0.5 s to dissolve in ammonia solution and the salt (Z) takes 10 s while the salt (Y) doesn’t dissolve. which of the following is correct?
a) salt (X) produces orange vapor on adding conc. H2SO4 to it.
b) salt (Z) produces violet vapor on adding conc.H2SO4 to it.
c) salt (Y) produces a vapor which turns paper wet with starch into blue on adding conc. H2SO4 to it
d) salt (X) produces a gas which gives white clouds with a glass rod wet with caustic soda solution on adding conc. H2SO4 to it.
42)In the equilibrium system : PbCO3(s) ⇌ Pb 2+(aq) + CO32+(aq)
How would adding Na2CO3 solution to this system affect both the concentration of lead (II) ions and the mass of lead (II) carbonate ?
a) [Pb2+] decreases, and so does the mass of PbCO3
b) [Pb2+] decreases, while the mass of PbCO3 increases.
c) [Pb2+] increases, while the mass of PbCO3 decreases
d) [Pb2+] increases, and so does the mass of PbCO3
43)The correct set to get an organic solvent from calcium carbide is:
a) dripping water- hydrogenation - thermal decomposition - chlorination.
b) dripping water- catalytic hydration – oxidation - neutralization - dry distillation – chlorination
c) dripping water –hydrogenation.
d) hydrogenation- polymerization.
44)What is pH value of pure water (at 50 ℃ ) , if its ionic product equals 5.495x10-14?
a) 6
b) 7
c) 6.63
d) 13.26
45)The monomer which is responsible for formation of:
a) 5-bromo-5-chloro-3-propyl-4-pentene.
b) 1-bromo-1-chloro-2-ethyl -1-butene
c) 4-bromo-4-chloro-3-propyl -3-butene.
d) 1-bromo-1-chloro-2-ethyl-1-pentene.
46)Number of isomers of mono-substituted alkane derivative which one molecule of it, contains one bromine atom is ……
(knowing that the molar mass of the compound is 137 g/mole) (C=12, H=1, Br=80)
a) 2
b) 4
c) 5
d) 6
47)The IUPAC name for (CH3)2CH – CH(C2H5)2
a) 2-methyl-3-ethyl pentane.
b) 3-ethyl-2-methylpentane
c) 1,1-dimethyl-2-ethyl butane.
d) 2-methyl heptane.
48)All of the following processes aim to improve the physical properties of iron ore before reduction process, except ...................
a) Binding and collecting particles.
b) Increase the % of iron in the ore.
c) Oxidation of impurities
d) Crushing and grinding rocks of the ore.
49)Markownikoff rule is applied on all the following except:
a) adding hydrogen chloride to 3-hexene
b) adding hydrogen chloride to methyl propene.
c) catalytic hydrationof 2-methyl-2- butene.
d) adding excess of hydrogen chloride to 2-butyne.
50)Consider the equation : BaCl2 + H2SO4 → BaSO4 +2HCl what is the volume, of 1 M H2SO4 that reacts with 0.5 g of BaCl2? [Ba=137, Cl=35.5 , S=32 , H=1 ,O=16]
a) 0.011 mL
b) 0.002 mL
c) 10.829 mL
d) 2.404 mL
51)Which of the following methods can't produce the isomer of the compound CH3COOCH3 ?
a) acidic hydrolysis of phenyl propanoate.
b) reaction of formic acid with ethanol in presence of dehydrating agent.
c) acidic hydrolysis of propyl acetate
d) reaction of acidified potassium permanganate with propanal
52)The following scheme represents the reactions of iron and its oxides at the suitable conditions : Which of the following choices illustrates (A), (B) and (C)?
53)The following equation represents a system at equilibrium state : AgCI(s) ⇌ Ag+(aq) + Cl - (aq)
Which of the following changes takes place by adding drops of lead acetate to that system?
a) The rate of backward reaction increases and concentration of silver ions increases.
b) The rate of backward reaction decreases and concentration of silver ions decreases.
c) The rate of forward reaction increases and concentration of chloride ion decreases
d) The rate of forward reaction decreases and concentration of chloride ion increases.
54)In lithium ion battery, lithium ions transfers through (LiPF6) as follow ...................
a) From the negative anode to the positive cathode during discharging
b) From the negative anode to the positive cathode during charging.
c) From the cathode to the anode during discharging.
d) From the cathode to the anode during charging.
55)The products of the reaction of salicylic acid with an adequate amount of sodium
56)Three iron oxides (A), (B) and (C) (A): is produced from reaction between iron and oxygen. (B): has black color & reacts with dilute Acids. (C): is not oxidized
a) (A) is used in paints.
b) (C) can be reduced to iron
c) (B) is a mixed oxide.
d) (B) is used as a strong magnet.
57)Which of the following is used to get methane from sucrose?
a) alcoholic fermentation / completely oxidation / dry distillation
b) alcoholic fermentation / completely oxidation / hydrolysis / neutralization / dry distillation
c) hydrolysis / alcoholic fermentation/ completely oxidation / dry distillation / hydrogenation
d) hydrolysis /alcoholic fermentation / completely oxidation / neutralization / dry distillation.
58)Heating the following iron compounds in atmospheric air (FeCO3 , Fe3O4 , FeO, Fe2O3) separately and comparing the solid mass produced after heating ………………….
a) The mass of Fe2O3 doesn’t change , the mass of FeO increases.
b) The mass of FeCO3 increases and the mass of Fe3O4 doesn’t change
c) The mass of Fe2O3 decreases and the mass of FeO decreases
d) The mass of FeCO3 increases and the mass of Fe3O4 increases
59)Potassium hydroxide solution is added iron (II) sulphate salt solution prepared from a long time in a glass beaker. The colour of the formed ppt. is
a) A gelatinous white.
b) Greenish white.
c) Gelatinous green.
d) reddish brown
60)
a) (C) can be converted into (A) by heating with Conc.H2SO4 at 110°C
b) (C) is not oxidized.
c) (C) is 2-methyl-2-propanol.
d) the reaction (X) obeys Markownikoff's rule.
61)During an experiment of detection of a cation of a salt (X), some of NaOH solution is added, a ppt. is formed, then by adding excess of the reagent, the precipitate disappears , the salt solution (X) is ……………
a) Al(NO3)3
b) FeSO4.
c) FeCl3.
d) CuSO4.
62)The following table for some chemical compounds:
Which of the following choices is correct?
a) (D) detect anion of (B) , anion of (A)
b) (C) detect cation of (B) , Anion of (A)
c) (C) detect anion of (B) , cation of (A)
d) (D) detect anion of (B) , Cation of (A)
63)By adding hot concentrated sulphuric acid to two solid substances (A&B) separately, no reaction in case (A), a gas evolved and precipitate is formed in case (B), Which of the following represents (A&B) ions?
a) A:CO32- , B:PO43-
b) A:SO42- , B:SO32-
c) A:NO2- , B:S2O32-
d) A:PO43- . B: S2O32-
64)During charging the car battery, ....
a) the value of e.m.f of the car battery decreases and the concentration of the acid increases
b) the value of e.m.f of the car battery increases and the concentration of the acid decreases
c) the negative pole of electrical source is connected to the lead electrode
d) the positive pole of electrical source is connected to the lead electrode
65)By using the following diagram:
Where each one mole of the compound(B) contains 12 moles of atoms)So, these compounds (A), (B) and (C) are ..
a) Ethyl chloride, (B) is Ethyl alcohol,(C) is acetaldehyde.
b) (A)2-Bromopropane, (B) Isopropyl alcohol,(C) is propanoic acid.
c) (A)2-Bromopropane,(B) Isopropyl alcohol, (C) is Acetone
d) (A) Ethyl chloride, (B) is Ethyl alcohol, (C)is Acetic acid.
66)primary alcohol can be obtained from secondary alcohol by .......
a) Dehydration / hydrogenation / halogenation / alkaline hydrolysis
b) Dehydration / catalytic hydration
c) Dehydration / addition of hydrogen halide / alkaline hydrolysis
d) Dehydration/halogenation / alkaline hydrolysis
67)What mass of lead bromide will dissolve in 200 mL of water to create a saturated solution? The solubility product of lead bromide is 6.30×10-6 at 298 K [molar mass of lead bromide = 367 g/mol]
a) 0.85 g
b) 0.4 g
c) 1.7 g
d) 0.55 g
68)The simplest aromatic compound can be obtained from sodium ethanoate by:
a) dry distillation → heating then rapid quenching → trimerization.
b) heating then rapid quenching → dry distillation → trimerization
c) trimerization → dry distillation → heating then rapid quenching
d) dry distillation → trimerization → heating then rapid quenching
69)In the equilibrium reaction :A + 3B ⇌ 2C ∆H = - 90 KJ/mol, if Kp at 600 K equals 4.62 x 10-3 ,What is the value of Kp at 800 K
a) 5.3 x10 -2
b) 5.05 x10-5
c) 4.62 x10-3
d) 8.7 x10-1
70)All the following can form molecules of acid during their hydrolysis , except ……………….
a) NH4NO3(s)
b) CH3COONa(s).
c) KHCO3(s).
d) KNO2(s).
71)From the previous scheme, Which of the following is correct:
a) (X) is used in preparing an aromatic acid , (Y) is used in producing Bakelite
b) (X) is prepared by (FriedelCrafts) method , (Y) is used in producing Dacron.
c) (X) is highly explosive, (Y) is a dibasic acid
d) (X) is highly soluble in water, (Y) molecules are bound with hydrogen bonds
72)Knowing that ionic product of water changes by changing the temperature , and under certain conditions from temperature found Kw = 0.49 x 10-13 , so pOH value for water in this state =
a) 5.56
b) 7
c) 7.13
d) 6.65
73)In the following diagram:
If you know that the compound (A) is an alkane its molar mass equals 72 g/mole and from the following diagram the incorrect choice is: (C=12, H=1)
a) Catalytic hydration of compound (B) produces secondary alcohol.
b) The compound (D) is dihydric alcohol
c) The substance (X) is potassium hydroxide
d) The compound (A)has three isomers
74)The opposite figure represents an analytical cell for molten iron (III) oxide when 10 amperes passed for two hours through the molten iron (III) oxide, the volume of evolved gas at anode at (S.T.P) is ...................
a) 8.34 L
b) 16.68 L
c) 12.51 L
d) 4.17 L
75)Sorbitol can be obtained from each of glucose and fructose by:
a) oxidation of carbonyl group in fructose and oxidation of formyl group in glucose.
b) oxidation of carbonyl group in fructose and reduction of formyl group in glucose.
c) reduction of carbonyl group in fructose and reduction of formyl group in glucose
d) reduction of carbonyl group in fructose and oxidation of formyl group in glucose.
76) (X) ,(Y) ,(Z) are three successive transition elements found at the beginning of the first transition series, the element (X) has the largest atomic number, they form the following compounds : ZA2 , YA2 , XA2 , the correct arrangement of their ions according to their magnetic moment is ...................
a) Z2+ > Y2+ > X2+
b) X2+ > Y2+ > Z2+
c) Z2+ > X2+ > Y2+
d) X2+ > Z2+ > Y2+
77)What is the correct IUPAC name of the following compound? C6H5OOCCH2CH2CH3
a) propyl benzoate
b) phenyl butanoate
c) butyl benzoate phenyl propanoate
78)From the following scheme represents reactions at the suitable conditions : Which of the following is correct for the compounds (A) , (C) and (E) ?
a) (A): FeO ,(C):Fe2O3 .(E): Fe
b) (A): Fe2O3 ,(C): Fe ,(E):Fe
c) (A): Fe3O4 ,(C): FeO ,(E):Fe
d) (A): FeO ,(C): Fe3O4 ,(E): Fe2O3
79)Ammonlysis of aspirin produces:
80)A current its intensity is 10 A is passed for 965 s in 1 L of 1 M HCl What is the pH value at the end of this experiment?
a) 0.8
b) 0.2
c) 0
d) 0.0458
81)We can get picric acid from sodium benzoate by:
a) dry distillation / nitration / alkaline hydrolysis / halogenation.
b) dry distillation / halogenation / alkaline hydrolysis / nitration
c) alkaline hydrolysis / dry distillation / halogenation / nitration.
d) dry distillation / alkaline hydrolysis / halogenation / nitration.
82)On heating 6.6 g of hydrated manganese chloride MnClX.4H2O it produces 4.2 g of dehydrated salt; the oxidation state of Mn is:
(Mn = 55, Cl = 35.5,O = 16,H = 1)
a) 7+
b) 6+
c) 3+
d) 2+
83)A, B, and C are three organic compounds on adding (A) to the compound (C) an ester is produced, and on adding sodium hydroxide to (B) or (C) a reaction occurs while on adding it to (A) no reaction occurs, then the three compounds are:
a) A: acetic acid, B: ethyl alcohol, C: phenol.
b) A: ethyl alcohol, B: phenol, C: acetic acid
c) A: phenol, B: ethyl alcohol, C: acetic acid.
d) A: acetic acid, B: phenol. C: ethyl alcohol.
84)Using the following diagram:
(B) +Z(g) / ∆ ← X(s) +Y(s) / ∆ ሮ (A)
If (X, Y, Z) are elements, which of the following could be A ,B?
a) A: FeCl3 , B: Fe3O4
b) A: FeS - B:Fe3O4
c) A:FeS , B: FeSO4
d) A:FeSO4 , B: FeCl2
85)(A) and (B) are two aromatic organic compounds, molecular formula of compound (A) is C6H6O , and the compound (B) is C7H6O3 all the following is correct except:
a) both react with sodium.
b) both react with sodium hydroxide.
c) both are acidic compounds.
d) both react with HCI
86)The product of catalytic hydration of phenyl acetylene is:
a) C6H5CH2CHO
b) C6H5CH2CH2OH
c) C6H5COCH3
d) C6H5CHOHCH3
87)By knowing the following electrodes potentials:
Mg2+ + 2e- → Mg Eo = - 2.37 V
V2+ + 2e- → V Eo = - 1.19 V
Cu2+ + e- → Cu+ Eo = +0.16 V
Which of the following equations represents a spontaneous reaction?
a) Mg2+ + V → V2+ + Mg
b) Mg2+ + 2Cu+ → 2Cu2+ + Mg
c) V2+ + 2Cu+ → V + 2Cu2+
d) V + 2Cu2+ → V2+ + 2Cu+
88)During charging the lead accumulator , all the following happened except …………
a) pOH of the solution in the battery decreases
b) pH of the solution in the battery decreases.
c) PbSO4 produced from the discharging process is converted into Pb and PbO2.
d) Pb2+ is reduced into pb0 at anode.
89)From the following diagram :
The compounds A and B are;
a) A: salicylic acid, B: aspirin
b) A: salicylic acid, B: methylsalicylate.
c) A: marokh oil, B: aspirin.
d) A: Benzoic acid, B: methyl benzoate.
90)PbO2(s) +S
If you know: Pb2+/Pb4+ = -1.69 V , Hg/Hg+ = - 0.59 V So this reaction is considered...
a) Nonspontaneous and emf = -1.1 V.
b) spontaneous and emf = 1.1 V
c) spontaneous and emf = 2.28 V.
d) Nonspontaneous and emf = - 2.28 V.
91)four transition elements and their oxides are X2O5 , Y2O3 , ZO2 and L2O the right arrangement for their oxidation number in these oxides is ...................
a) L < Z < Y < X.
b) L < Y < X < Z.
c) L < Y < Z < X
d) Y < L < Z < X.
92)What is the pH value of a mixture formed from mixing equal volume of two solution of NaOH , the pH of the 1st and the 2nd solution equals 13 , 8 respectively?
a) 8.3
b) 6.5
c) 12.7
d) 13.5
93)The mathematical relationship:1 2 Ma Va = Mb Vb is used for the titration process between ....
a) Sulphuric acid and barium hydroxide solution.
b) Sulphuric acid and sodium hydroxide solution.
c) Hydrochloric acid and potassium hydroxide solution.
d) Hydrochloric acid and barium hydroxide solution
94)The correct arrangement of the following solutions according to their pOH value is …………….
a) NaCl > CH3COOK > NH4NO3.
b) NH4NO3 > NaCl > CH3COOK
c) CH3COOK > NaCl > NH4NO3.
d) NH4NO3 > CH3COOK > NaCl.
95)Formic acid can be obtained from acetic acid by
a) Neutralization / dry distillation/halogenation /alkaline hydrolysis.
b) Neutralization / dry distillation/ halogenation / alkaline hydrolysis/ oxidation
c) Neutralization dry distillation / rapid quenching / hydration.
d) Neutralization / dry distillation / rapid quenching /alkaline hydrolysis/ oxidation.
96)If the value of pOH for weak acid equal 10 and its equilibrium constant Ka = 5.1 x 10-4 , so the degree of ionization of the acid equals ……….
a) 6.3
b) 4.8
c) 7.2
d) 5.1
97)The following equation represents a system at equilibrium state: PbCl2(s) ⇌ Pb2+(aq) + 2Cl-(aq) , Which of the following changes takes place by adding drops of mercury I nitrate to that system?
a) The rate of backward reaction decreases and concentration of lead Il ions increases.
b) The rate of backward reaction increases and concentration of lead Il ions decreases
c) The rate of forward reaction increases and concentration of lead ll ions decreases
d) The rate of forward reaction decreases and concentration of chloride ions increases
98)On alkaline Hydrolysis of the compound C4H9Br which contain one methylene group, the produced compound is:
a) primary alcohol only.
b) secondary alcohol only.
c) primary or secondary alcohol
d) tertiary alcohol only.
99)The ionization constant of formic acid is calculated from the relationship:
Ka = [HCOO ][H3O+] [����������] , The equation that expresses the ionization of the acid is:
a) HCOOH(aq) + H2O(l) ⇌ HCOO - (aq) + H3O+ (aq)
b) HCOOH (aq) ⇌ HCOO - (aq) + H3O+ (aq).
c) HCOO - (aq) + H3O+ (aq) ⇌ HCOOH(aq).
d) HCOO - (aq) + H3O+ (aq) ⇌ HCOOH (aq) + H2O(l)
100) (A, B and C) are 3compounds: on adding (A) to the compound (C) a Pleasant odor is produced, and on adding sodium hydroxide to (B) or (C) a reaction occurs while on adding it to (A) no reaction occurs, then the three compounds are:
a) A: acid, B: alcohol, C: phenol.
b) A: alcohol, B: phenol, C: acid
c) A: phenol, B: alcohol, C : acid.
d) A; alcohol, B; acid, C: phenol.
101) Molecular formula of compound resulted from the reaction between compound B and D is:
(C) Its derivative used in manufacture of safe anesthetic
a) C3H8O
b) C5H10O2.
c) C4H8O2
d) C5H10O
102) To convert the yellow iron ore into a stable iron compound, the following processes performed respectively.
a) Thermal decomposition / heating with CO at 750 ℃ / adding dill HCl.
b) Thermal decomposition / heating with hydrogen at 645 ℃ / adding dill sulphuric acid.
c) Roasting / reduction at the blast furnace / reaction with Sulphur.
Roasting / adding conc. Hydrochloric acid
103) (A) ,(B) and (C) are examples of alloys as shown in the table :
Its hardness is more than its elements
Its elements have the same crystalline form Its elements combined chemically These alloys are...................
a) (A) is an interstitial, (B) is a substitutional, (C) is an intermetallic.
b) (A) is a substitutional, (B) is an interstitial, (C) is an intermetallic.
c) (A) is an intermetallic, (B) is a substitutional, (C) is an interstitial.
d) (A) is an interstitial, (B) is an intermetallic, (C) is a substitutional
104) you If know that: X+ → X0 E0 = - 2.92 V , Y2+ → Y0 E0 = 0.34 V
Then the cell diagram for the cell formed from these two electrodes is:
a) 2X0 / 2X+ // Y2+ / Y0
b) Y2+ / Y0// 2X+ / 2X0
c) Y0/ Y2+ // 2X0 / 2X+
d) X+ / X0 // Y0 / Y2+
105) Two transition elements (X,Y) The electronic configuration for (X2+) ion is [18Ar] 3d6 and for (Y3+) ion is [18Ar] 3d7 . what is the electronic configuration of the (Z) ion located between these two elements in the periodic table in the 4+ oxidation state:
a) [18Ar]3d4
b) [18Ar] 3d6
c) [18Ar] 3d7
d) [18Ar] 3d5
106) An element X reacts with hydrochloric acid according to the following equation:
X + 2HCI → XCl2 + H2
Then the reduction potential of the element X equal:
a) Zero
b) +0.8 V
c) -3.045 V
d) -2.375 V
107) study the opposite diagram :the three compounds 1 ,2 ,3 are respectively ……………….
a) ❶FeCl2 ❷Fe2O3 ❸Fe(OH)3
b) ❶FeCl3 ❷Fe(OH)3 ❸Fe2O3
c) ❶FeCl3
d) ❶FeCl2
Fe2O3
2
3
108) Consider the half-cell reactions: X2+ + 2e- → X E0= -1.029 V , Y0 → Y2+ + 2e- E0= -1.51 V
On forming cell of the two elements (X & Y) the voltmeter reading and the reaction are:
a) +2.539 V / will produce current b) -2.5329 V / will produce current
c) - 0.481 V / non-spontaneous
d) + 0.481 V / spontaneous
109) A Transition element (X) one of its fungicide, and its maximum oxidation state does not exceed its group number, therefore:
a) The element follow it can lose all 4s & 3d electrons
b) Compound XO2 is used as an oxidizing agent in the dry cell
c) Element (X) can form an alloy with tin called bronze
d) The element that precedes it has five unpaired electrons in its atomic state
110) (X, Y, Z) three sparingly soluble salts in water ammonia solution was added to each of them, so the salt (X) takes 0.5 s to dissolve in ammonia solution and the salt (Z) takes 10 s while the salt (Y) doesn’t dissolve. which of the following is correct?
a) salt (X) produces orange vapor on adding conc. H2SO4 to it
b) salt (Z) produces violet vapor on adding conc.H2SO4 to it
c) salt (Y) produces a vapor which turns paper wet with starch into blue on adding conc. H2SO4 to it
d) salt (X) produces a gas which gives white clouds with a glass rod wet with caustic soda solution on adding conc. H2SO4 to it
111) Which of the following is used to get methane from sucrose?
a) alcoholic fermentation / completely oxidation / dry distillation
b) alcoholic fermentation / completely oxidation / hydrolysis / neutralization /dry distillation
c) hydrolysis / alcoholic fermentation / completely oxidation / dry distillation / hydrogenation
d) hydrolysis/ alcoholic fermentation / completely oxidation /neutralization/ dry distillation
112) A sample of a mixture of sodium chloride and sodium phosphate salts its mass is 10 g dissolved in water, then an excess of barium chloride solution is added to it, a precipitate is formed its mass is 6 g so. The percentage of sodium phosphate in the sample will be .....
[Ba = 137 , Na = 23 , P = 31 , O = 16]
a) 65.5%
b) 49.05%
c) 32.7%
d) 16.35%
113) On adding a substance (X) which is the most abundant transition element in the earth's crust to a tube containing a concentrated acid, after a while no observation appeared, which of- the following is correct?
a) The acid is more stable than conc. sulphuric acid
b) (X) can react with liquid water
c) the pure form of metal (X) has no industrial importance
d) (X) reacts with dil. acids produce X(II) salt & water
114) By adding concentrated H2SO4 to solid salt has a chemical formula (AX) a violet vapor evolves, the anion which has ability to remove the color of the solution of the evolved vapor is:
a) I-
b) Br-
c) S2O32-
d) NO3-
115) To obtain Fe(OH)3 from siderite ore, the following processes are carried out respectively:
a) Roasting - Reduction in a Midrex Oven - adding dil. HCI -adding NaOH
b) Roasting - reducing in the blast furnace - adding dil. HCI -adding NaOH
c) Roasting - reduction at 500 °C - passing Cl2 gas above the product - adding NaOH
d) Roasting - reduction by CO,H2 - passing Cl2 gas above the product - adding NaOH.
116) 14.3 g of hydrated sodium carbonate Na2CO3.XH2O dissolved in water, then the volume of the solution is completed to 1 litre, if 25 mL of this solution is neutralized by 25 mL of 0.1 mo/L of hydrochloric acid so, the percentage of water crystallization will be ··········· [O = 16 , C = 12, Na = 23]
a) 31.65%
b) 25.87%
c) 15.73%
d) 62.94%
117) Two transition elements X and Y the electronic configuration of X3+ is [18Ar]3d5 and that of Y2+ is [18Ar]3d8 , All the following of Y3+ is are correct except:
a) (X) is less denser than (Y)
b) (X& Y) can form interstitial alloy
c) the electronic configuration of the element lies between (X & Y) is [18Ar] 4s² 3d7
d) both of (X & Y) belongs to same group
118) If the solubility product of the salt (XY2) is 1.6 x 10-10 , the concentration of [Y-] equals ...................
a) 3.41 X 10-4 M
b) 6.82 X 10-4M
c) 2.36 x 10-5 M
d) 2.14 x 10-5 M
119) On addition of ammonium chloride solution to a solution of ammonium Hydroxide:
a) Dissociation of NH4OH increases
b) The value of pOH decreases
c) Concentration of OH- decreases
d) Concentration of NH4+ and OH- increases
120) In 0.1 M aqueous solution of H2S, has ionized according to the equation: H2S(aq) + H2O(l) ⇌ HS- (aq) + H3O+(aq) Ka = 9.1x10-8 What is the concentration of HS- ions in this solution?
a) 9.5 x 10-5
a) 4.75 x 10-5
b) 1.9 x 10-4
c) 0.95 x 10-4
121) Weak monobasic acid ionizes in a percentage of 1 % when its concentration 0.1 M (at 25°C), what is its ionization percentage when it is diluted by water until its concentration becomes 0.025 M at the same temperature?
a) 2 %
b) 1 %
c) 4 %
d) 3 %
122) Aniline C6H5NH2 is a weak base, if Kb = 7.4x10-10, Then the pH value of a solution of concentration 3.3x10-3 M equals:
a) 8.2
b) 9.14
c) 5.91
d) 12.9
123) Study the opposite compound, H2C = CH – COOH
What is the number of H2 moles which is needed to convert 1 mol of it to saturated alcohol?
a) 1
b) 2
c) 3
d) 4
124) We can prepare the ester which is the isomer of the compound CH3COOCH3 from:
a) acetic acid with a methyl alcohol
b) formic acid with ethyl alcohol
c) formic acid with methyl alcohol
d) acetic acid with ethyl alcohol
125) The isomer of the compound is obtained from:
a) Benzoic acid and methanol
b) Acetic acid and phenol
c) Formic acid and phenol
d) Benzoic acid and ethanol
126) Which of the following compounds produces 2,2-dimethyl propane by dry distillation process?
a) Sodium pentanoate.
b) 3,3-dimethyl sodium butanoate.
c) Sodium hexanoate.
d) 2,2-dimethyl sodium propanoate.
127) From the following diagram :
Which of the following choices is correct for (X) and (Y)?
a) (X) and (Y) react by addition.
b) (X) and (Y) react by substitution
c) (Y) reacts by addition only.
d) (X) reacts by substitution only.
128) Two organic compounds with the general formulas :
(A): C2nH4nOn (B): CnH3nOn
What could be the compounds (A) and (B) ?
a) (A): Ethylene glycol, (B): Butanoic acid.
b) (A): Butanoic acid, (B): Ethylene glycol.
c) (A): Methyl acetate, (B): Butanoic acid.
d) (A): Ethylene glycol, (B): Methyl acetate.