1st session exam – 2021 of Ministry of Education
Choose the correct answer:
1- Hydrogenation of the compound produced
from reduction of phenol in suitable conditions
leads to form ……
a) picric acid
b) aliphatic compound
c) vinyl chloride
d) aromatic compound
2- Alkaline hydrolysis for C3H7Br, by heating, it
may produce ……….
a) primary alcohol only
b) secondary alcohol only
c) primary or tertiary alcohol
d) primary or secondary alcohol
3- The element (X) from elements of the first
transition series, it is difficult to be reduced
from X+3 to X+2 under normal conditions. The
element is …………
a) Fe
b) Mn
c) CO
d) Ni
4- When concentrated sulphuric acid is added
to 2 salts with one of them: a gas (X) evolves
which turns a paper wetted by starch yellow,
with the other one: a gas (Y) evolves which
turns a paper wetted by starch blue, the 2 gases
are ………
a) X: NO2 (g , Y: I2 (v
b) X: HBr (g, Y: HI (g
c) X: HCl (g, Y: Br2 (v
d) X: Br2 (g, Y: I2 (v
5- A and B are hydrocarbon derivatives, they
share some chemical properties where:
A: can be used as fuel
B: enter in the preparation of one of plastic
products
Then A, and B are ………
a) A: alcohol, B: alkyl halide
b) A: phenol, B: acid
c) A: ester, B: aldehyde
d) A: alcohol, B: phenol
6- In the following equilibrium reaction:
Br2 (g + H2 (g ⇌ 2HBr (g. If the partial pressure of
bromine, hydrogen, and hydrogen bromide
gases are 0.5 atm, 1 atm, and 1.5 atm
respectively. So, the equilibrium constant for
dissociation of hydrogen bromide to its
elements = …………
a) 2.2
b) 0.22
c) 0.45
d) 4.5
7- By using the following diagram:
𝒉𝒚𝒅𝒓𝒐𝒍𝒚𝒔𝒊𝒔
𝑶𝒙𝒊𝒅𝒂𝒕𝒊𝒐𝒏
A 𝑨𝒍𝒌𝒂𝒍𝒊𝒏𝒆
B
C
→
→
Where 1 mole of the compound (C) contains 5
moles atom, the compounds A, B, and C are
……….
a) A is methyl chloride, B is methanol, and C is formic
acid.
b) A is ethyl chloride, B is ethanol, and C is acetic acid.
c) A is methyl chloride, B is methanol, and C is
formaldehyde.
d) A is ethyl chloride, B is ethanol, and C is
acetaldehyde.
8- When drops of blue litmus solution are
added to potassium nitrate solution, the color
of the indicator is ……….
a) blue
b) violet
c) red
d) green
9- Titration of NaOH solution with diluted
sulphuric acid with the same concentration, at
the end point the volume of the used acid will
be ……….
a) equal the volume of the alkali solution.
b) half the volume of the alkali solution.
c) double the volume of the alkali solution.
d) 4 times the volume of the alkali solution.
10- On charging the lead – acid accumulator, all
the following occur except ……….
a) the concentration of the acid increases
b) the mass of water decreases.
c) POH value decreases
d) PH value decreases
11- In the following reaction:
H2N – NH2 (g ⇄ N2 (g + 2H2 (g, ∆H = (-). The amount
of evolved hydrogen gas can be increased by …
a) increasing the temperature
b) increasing the container volume
c) adding excess of N2 to the reaction medium
d) adding a catalyst to the reaction medium
12- In the following reaction: I2 (g + H2 (g ⇄ 2HI (g.
If the equilibrium constant for this reaction =
1.55, and the concentration of hydrogen iodide
is 1.035M so, the concentration of hydrogen
and iodine respectively = ……….
a) [H2] = 0.79M, [I2] = 0.83M
b) [H2] = 0.83M, [I2] = 0.79M
c) [H2] = 0.83M, [I2] = 0.83M
d) [H2] = 0.135M, [I2] = 0.135M
13- To protect the element (A) from corrosion by
using element (B). Which of the following
occurs?
a) Withdrawing of electrons from A to B and it
represents anodic protection.
b) Withdrawing of electrons from B to A and it
represents anodic protection.
c) Transferring of electrons to the element (A) and it
represents cathodic protection.
d) Transferring of electrons to the element (A), and (B)
and it represents scarifying electrode.
14- Which one of the following is considered as
an isomer for ethyl pentanoate?
a) Pentyl formate
b) Propyl butanoate
c) Phenyl benzoate
d) Phenyl acetate
15- On performing nitration process to the
compound produced from thermal catalytic
reforming of normal heptane gives …………
a) an insecticide
b) a detergent
c) an explosive substance its molecular formula
C6H3N3O7
d) an explosive substance its molecular formula
C7H5N3O6
16- 4 metals: A, B, C, and D are characterized
by:
• The element (A): lies in group 3A
• The element (B): forms with tin bronze alloy
• The element (C): is used as a catalyst in
ammonia industry
• The element (D): is non – transition, and is
found in D – block
To cover a metallic object by brass, we will use
……….
a) B and D
b) A and C
c) A and B
d) C and D
17- Which of the following expresses saturated
hydrocarbon which doesn’t contain methyl
group?
a) C5H12
b) C6H12
c) C7H8
d) C7H12
18- If you know that the solubility degree of
silver chromate (Ag2CrO4) is 6.62  10-5M, the
solubility product of this compound = ………
a) 0.58  10-12
b) 1.16  10-12
c) 2.32  10-12
d) 3.48  10-12
19- If you have 2 compounds A and B:
• The compound A is an open – chain alkane, its
molecular mass is 58.
• The compound B is saturated monohydric
alcohol, its molecular mass is 60.
So, the 2 compounds A and B are …………
[C=12, O=16, H=1]
a) A is a gas, B has less boiling point than A
b) A is a liquid, B has higher boiling point than A
c) A is a gas, B has higher boiling point than A
d) A is a liquid, B has less boiling point than A
20- When 1 mole of an alkane (X), and an
alkene (Y) are completely combusted
separately. The number of water vapor moles
which are produced from X and Y are …………
[Given that (n) is the number of carbon atoms]
a) from X (n+1), from Y (n)
b) from X (n – 1), from Y (n + 1)
c) from X
(3𝑛+1)
3𝑛
, from Y
2
2
d) from X (3n + 1), from Y (3n)
21- Physical process done for iron ores leading
to decreasing the mass of the iron ore is ……….
a) roasting
b) sintering
c) crushing
d) surface tension
22- On a rod of an element (A) is placed in a
solution of ions of an element (B). If you know
that (A) is divalent, and (B) is monovalent.
Which of the following statements is true?
a) Number of dissolved moles of (A) is double the
number of precipitated moles of (B).
b) Number of dissolved moles of (A) is half the number
of precipitated moles of (B).
c) Number of dissolved moles of (A) equals the number
of precipitated moles of (B).
d) Number of dissolved moles of (A) is 3 times the
number of precipitated moles of (B).
23- The following table represents the
molecular formula for 2 substances (X) and (Y):
X
Y
C2H2Br2
C4H6
When 1 mole of bromine is dissolved in carbon
tetra chloride is added to 1 mole of each of the 2
substances X and Y. Which of the following
statements is correct?
a) The colour of bromine discharges with X and doesn’t
change with Y.
b) The colour of bromine doesn’t change with both X
and Y.
c) The colour of bromine discharges with both X and Y.
d) The colour of bromine doesn’t change with X and
discharges with Y.
24- If you know that:
• A → A+2 + 2eE0 = 0.409V
• B → B+ + eE0 = - 0.800V
If a galvanic cell composed of the 2 elements A
and B. Which of the following represents the
cell diagram and the value of E.M.F?
a) A/A+2 // 2B+ / 2B, E.M.F = 1.209V
b) 2B+/2B // A/A+2, E.M.F = 1.4V
c) B+/B // 2A/2A+, E.M.F = 0.896V
d) 2A/2A+2 // B+/B, E.M.F = 0.879V
25- The cell diagram for the fuel cell expresses
by one of the following ………
a) H2/2H+ // O2/2O-2
b) 2H2/4H+ // O2/2O-2
c) 2O-2/O2 // 2H+/H2
d) O2/2O-2 // 2H2/4H+
26- A is an organic compound, B is an
inorganic compound, on adding the compound
(C) to the compound (A), a violet colour is
formed, while adding compound (C) to
compound (B), a reddish – brown ppt is formed.
Which of the following choices is correct?
a) A: acetic acid, B: sodium iodide
b) A: basic compound, B: acidic salt
c) A: acidic compound, B: alkaline compound
d) A: liquid substance, B: gas solution in water
27- the transition element which has the
highest boiling point, and the electronic
configuration of its ion is [18Ar], its ion will be
…………
a) W-2
b) X+3
c) Y+
d) Z-
28- 3.4gm of impure potassium chloride
dissolved in water, and excess of silver nitrate
solution is added to the solution, 6.7gm of
silver chloride precipitated. So, the percentage
of chlorine in the sample = ……….
[K=39, Ag=108, Cl=35.5]
a) 24.5%
b) 46.7%
c) 48.7%
d) 94.1%
29- Which of the following is a complete
reaction?
−
+
a) CH3COOH (l + H2O (l = 𝐶𝐻3 𝐶𝑂𝑂𝑎𝑞.
+ 𝐻3 𝑂𝑎𝑞.
b) HCOOH (aq. + CH3OH (aq. = HCOOCH3 (aq. + H2O (l
c) NaOH (aq. + HCl (aq. = NaCl (aq. + H2O (l
−
d) NH3 (g + H2O (l = 𝑁𝐻4 +
+
𝑂𝐻
𝑎𝑞.
𝑎𝑞.
30- Which of the following can be used to
distinguish between the solid salt of sodium
sulphide and sodium sulphate?
a) AgNO3 (s
b) Ca(OH)2 (s
c) HCl (aq.
d) NaOH (aq.
31- When AgNO3 solution is added to the salt
solutions X and Y, a yellow precipitate is
formed with both, when ammonia solution is
added to the 2 precipitates, the precipitate
disappears in case of salt solution (Y), and
doesn’t change in case of salt solution (X) so,
the 2 salts X and Y are …………
a) X: NaI, Y: Na3PO4
b) X: NaCl, Y: NaBr
c) X: NaNO3, Y: Na2SO4
d) X: NaNO2, Y: NaNO3
32- One of students added ammonium
hydroxide reagent to one of iron (II) salts, the
colour of the formed ppt. differs from the
expected colour. The probable reason is ………
a) the used reagent is wrong
b) the reagent is a strong base
c) the reaction needs to be heated
d) the salt is mixed with other salts
33- To obtain magnetic iron oxide from iron (III)
chloride, the following processes are done in
sequence …………
a) reaction with hydrochloric acid – oxidation –
reduction
b) reaction with alkaline solution – thermal
decomposition – reduction
c) oxidation – reduction – thermal decomposition
d) thermal decomposition – oxidation – reaction with
alkaline medium
34- The transition element that is used in
process of hydrogenation of oils, the electronic
configuration of its ion (M+3) is ……….
a) [18Ar], 3d7
b) [18Ar], 3d8
c) [18Ar], 4s2, 3d7
d) [18Ar], 4s2, 3d8
35- The number of methylene groups in ethyl
butene = ……….
a) 3
b) 2
c) 4
d) 1
36- When copper sulphate solution reacts with
gas (A) in acidic medium, a black precipitate is
formed, and when silver nitrate solution reacts
with solution (B), a black precipitate is formed
too. So, A and B are …….
a) A: CO2, B: NaBr
b) A: H2S, B: NaI
c) A: H2S, B: Na2S
d) A: SO2, B: NaCl
37- X, Y, and Z are 3 successive transition
elements found at the end of the first transition
series, the element (X) has the largest atomic
number, they form the following compounds:
ZA2, YA2, and XA2, the correct arrangement of
their ions according to their magnetic moment
is ……….
a) Z+2 > Y+2 > X+2
b) X+2 > Y+2 > Z+2
c) Z+2 > X+2 > Y+2
d) X+2 > Z+2 > Y+2
38- In the following cell in-front of you:
Which of the following choices is correct?
a) The cell is a galvanic cell, the concentration of
solution (A) increases.
b) The cell is a galvanic cell, the concentration of
solution (B) increases.
c) The cell diagram is an electrolytic cell, the
concentration of solution (A) decreases.
d) The cell diagram is an electrolytic cell, the
concentration of solution (B) decreases.
39- A galvanic cell is expressed by the
following cell diagram:
Fe0/Fe+2 // Ni+2/Ni0 if:
0
Fe (s → 𝑭𝒆+𝟐
𝒂𝒒. + 2e , E = + 0.409V
+𝟐 + 2e- → Ni , E0 = - 0.23V
𝑵𝒊𝒂𝒒.
(s
Then the E.M.F of the cell is …………
a) 1.639V
b) 0.936V
c) 0.396V
d) 0.179V
40- Oxidation of the compound
gives ………….
a) 2,3 – dimethyl propanoic acid
b) 2,3 – dimethyl butanoic acid
c) 2,3 – diethyl butanoic acid
d) 2,4 – diethyl propanoic acid
41- From the following diagram:
C2H2
𝑷𝒐𝒍𝒚𝒎𝒆𝒓𝒊𝒛𝒂𝒕𝒊𝒐𝒏
𝑨𝒍𝒌𝒚𝒍𝒂𝒕𝒊𝒐𝒏
𝑶𝒙𝒊𝒅𝒂𝒕𝒊𝒐𝒏
A
C
B
→
→
→
The compound (C) is ……….
a) C6H6O2
b) C7H6O2
c) C7H6O3
d) C6H8O3
42- If the amount of electricity required to
precipitate the equivalent mass of a metal
equals the amount of electricity needed to
precipitate 1 mole of it. Which of the following
statements correctly represents this process?
a) A mole of metal ion gains a mole of electrons.
b) A mole of metal ion loses a mole of electrons.
c) A mole of metal ion gains 2 moles of electrons.
d) A mole of metal ion loses 2 moles of electrons.
43- At constant temperature, on dilution of a
weak electrolyte ……….
a) the degree of ionization decreases, and the solution
concentration increases.
b) the degree of ionization increases, and the solution
concentration increases.
c) the degree of ionization increases, and the solution
concentration decreases.
d) the degree of ionization decreases, and the solution
concentration decreases.
44- In the equilibrium reaction:
2NO2 (g ⇄ N2O4 (g + heat. The value of equilibrium
constant changes with the change of ………
a) the pressure and catalyst
b) the temperature only
c) the concentration and catalyst
d) the pressure only
45- When 1 mole of ethylene glycol reacts with
2 moles of acetic acid, the product is …………
a)
b) CH2COOCH3
CH2COOCH3
c) CH3COOC2H5
d) CH3COO(CH2)2CH3
46- The compounds A and B are organic
compounds, each of them reacts with NaOH.
Which of the following statements is correct?
a) The molecular formula of compound (A) is C6H6O,
and the molecular formula of compound (B) is C2H6O.
b) The compound (A) is methyl alcohol, and the
compound (B) is acetic acid.
c) The compound (A) is isopropyl alcohol, and the
compound (B) is phenol.
d) The molecular formula of compound (A) is C6H6O,
and the molecular formula of compound (B) is C7H6O3.
47- The electronic configuration for the ion of a
transition element (X) in the compound X2O3
contains 3 unpaired electrons, this element is
found in the periodic table in group number …
a) 9
b) 10
c) 11
d) 12
48- The following reactions occur in suitable
conditions to obtain the compounds A, B, and C
as follows:
𝐦𝐢𝐧𝐞𝐫𝐚𝐥 𝐚𝐜𝐢𝐝 A
∆
B 𝐇𝐲𝐝𝐫𝐨𝐠𝐞𝐧𝐚𝐭𝐢𝐨𝐧
C
R – CH2OH 𝐒𝐭𝐫𝐨𝐧𝐠
→
→
→
If you know that the compound (B) follows
Markownikoff’s Rule. So, the compounds A, B,
and C are ……….
a) A ethyl hydrogen sulphate, B ethene, and C ethane
b) A ethene, B ethyl hydrogen sulphate, and C ethane
c) A propyl hydrogen sulphate, B propene, and C
propane
d) A propene, B propane, and C propyl hydrogen
sulphate
49- To obtain the simplest aromatic compound
from the aromatic compound which has the
formula C7H8, the correct arrangement for the
required processes is ………….
a) neutralization, oxidation, dry distillation.
b) oxidation, dry distillation, neutralization.
c) neutralization, dry distillation, oxidation.
d) oxidation, neutralization, dry distillation.
50- When silver nitrate solution is added to 2
salt solutions A and B, a ppt is formed with salt
solution (A), and no ppt is formed with salt
solution (B). The anions of the 2 salts
respectively are …………
a) A sulphide, B nitrite
b) A nitrite, B sulphide
c) A bicarbonate, B nitrite
d) A nitrite, B bicarbonate
Model Answer 1st session exam – 2021 of
Ministry of Education
Question Number
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
Choice
B
D
A
D
D
B
A
A
B
C
B
C
B
B
D
A
B
B
C
A
D
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
B
C
A
B
C
B
C
C
C
A
D
B
A
A
C
A
A
D
B
B
A
C
B
A
D
47.
48.
49.
50.
B
C
D
A