Download Inorganic Chemistry

Неорганічна хімія
1
What reagent should be chosen in order to detect presence of Ca2+ cation in a
solution?
A (NH4)2C2O4
B HCl
C HNO3
D KCl
E NaBr
2
Oxidizing properties of free halogens increase in the following group:
A I2, Br2, Cl2, F2
B F2, Cl2, Br2, I2
C Cl2, F2, I2, Br2
D Br2, F2, I2, Cl2
E I2, Cl2, Br2, F2
3
Name a complex compound that has antitumoral activity:
A [Pt(NH3)2Cl2]
B [Co(NH3)5NO3]Cl2
C Na4[Sn(OH)3Cl3]
D [Cu(NH3)4(SCN)2]
E K2Na[Co(NO2)6]
4
What reaction is applied for detection of Fe3+ cation?
A Complexing
B Precipitation
C Hydrolysis
D Neutralization
E Reduction
5
Hydrogen is characterized by the following oxidation rates: -1; 0; +1. The -1
oxidation rate hydrogen has in:
A Hydrides
B Acids
C Hydroxides
D Water
E Acid salts
6
Silver nitrate is used in ophthalmology as an antibacterial and anti-inflammatory agent.
AgNO3 can be produced as a result of interaction between the following substances:
A Ag + HNO3
B AgCl + NH4NO3
C Ag + KNO3
D Ag2O + KNO3
E AgCl + NaNO3
7
Choose a non-salt-forming oxide from the following compounds:
A N2O
B CuO
C P2O5
D SO3
E Na2O
8
What substance can act as both oxidant and reducer in oxidation-reduction reactions?
A SO2
B SO3
C CO2
D PbO2
E CrO3
9
Nitrogen (I) oxide (N2O) is applied for inhalation narcosis. It is obtained by heating of:
A NH4NO3
B NH3
C Cu(NO3)2
D NH4OH
E NaNO3
10
Calcium hydrogen sulphide hexahydrate is often used in the cosmetological practice.
Specify the the formula of his salt:
A Ca(HS)2*6H2O
B CaS*6H2O
C CaSO3*6H2O
D Ca(HSO3)2*6H2O
E CaSO4*6H2O
11
Qualitative reaction for determination of Cr(VI) compounds is origination of chromium
oxide-diperoxide that stains ether layer with blue. What is formula of this chromium
compound?
A CrO5
B CrO3
C Cr2O3
D CrO
E NaCrO2
12
What is molecular weight of a gas if its hydrogen density is 15?
A 30 g/mole
B 7,5 g/mole
C 15 g/mole
D 45 g/mole
E 60 g/mole
13
Specify the complexing agent for a complex compound K2[HgI4]:
A Hg2+
B K+
C ID HgI42E K2[HgI4]
14
Qualitative determination of the following compound is accompanied by blue stain of the
ether layer:
A H2O2
B Cl2
C Na2HPO4
D MnSO4
E FeSO4
15
Diluted solution of hydrochloric acid was added to a solution under examination. This
resulted in origin of white caseous deposition. This is the evidence of presence of following ions:
A Silver
B Ammonium
C Iron (II)
D Barium
E Iodine
16
Which of the following oxides is the anhydride of nitric acid?
A N2O3
B N2O5
C N2O4
D NO
E NO2
17
Sodium nitrite is used in medicine as a vasodilating drug against stenocardia. NaNO2
acts as reducer with the following compound:
A KMnO4
B H2S
C NH3
D KI
E NaHCO3
18
Presence of arsenic in the raw material used in pharmaceutical production can be detected
by means of Marsh test. During the test tha compond of arsenic with hydrogen is
produced. What is the oxidation number of arsenic in this compound?
A –3
B +3
C +5
D –5
E +1
19
Iron (II) sulfate is a part of drugs used in treatment of iron deficiency anemia. FeSO 4
enters into reaction with one of the following compounds:
A KMnO4
B HCl
C CO2
D FeCl2
E NaCl
20
Sulphur (IV) oxide is a constituent part of one of the most harmful environment pollutants
called toxic smog. When dissolved in water, sulphur (IV) oxide forms the following acid:
A Sulphurous
B Sulphuric
C Hydrosulphuric
D Thiosulfate
E Tetrathionate
21
Choose the most stable complex ion on the ground of values of instability constants:
A [Fe(CN)6]3Kн = 1*10-31
B [Ag(CN)2]
Kн = 1*10-21
+
C [Ag(NH3)2]
Kн = 5,89*10-8
2D [Ni(CN)4]
Kн = 1*10-22
2+
E [Co(NH3)6]
Kн = 4,07*10-5
22
Which of the following formulas corresponds to the electronic configuration of Cu atom?
A [Ar] 3d10 4s1
B [Ar] 3d9
4s2
6
C [Ar] 3d
4s2
D [Ar] 3d8
4s2
7
E [Ar] 3d
4s2
23
Presence of which ion of d-elements in the solutions can be detected by means of K4[Fe(CN)6]?
A Fe3+
B Fe2+
C Zn2+
D Cr3+
E Cu2+
24
Change of acid-base properties in the compounds MnO
the following regularity:
A Acidic properties become stronger
B Basic properties become stronger
C Acid-base properties stay unchanged
D Acidic properties diminish
E-
MnO2
Mn2O7 answers to
25
What gas is produced as a result of interaction of concentrated nitric acid with sulphur?
A NO2
B H2
C N2
D N2O
E NH3
26
Which electronic configuration of valence electrons is corresponding to an element of the
4th period, VI group, main subgroup?
A 4s2 4p4
B 4s1 3d5
C 6s2 6p2
D 6s2 5d2
E 3s2 3p4
27
According to the mass action law, velocity of process 2SO2 (g) + O2 (g) = 2SO3 (g) is expressed as:
A k [SO2]2 x [O2]
B [2SO2] x [O2]
C k [SO2] x [O2]
D k [SO2] + [O2]
E [SO2]2 + [O2]
28
An acid was added to the solutions of the given salts. In what case does the gas emission
take place?
A Na2CO3
B K2SO4
C CuSO4
D Na2SiO3
E Ca3(PO4)2
29
In oxidation-reduction reactions potassium permanganate KMnO4 acts only as an
oxidizer. When the reaction takes place in the acidic medium, the crimson solution becomes
discoloured. Specify the product of MnO4--ion reduction in the acidic medium:
A Mn2+
B MnO2
C MnO42D [Mn(OH)2]
E [Mn(OH)4]
30
Chlorophyll, the green pigment of plants, is a chelate compound. Specify the chelating ion
in the chlorophyll:
A Mg2+
B Fe3+
C Mn2+
D Fe2+
E Ni2+
31
Potassium dichromate K2Cr2O7 is applied as oxidant in acidic medium. What is the
product of reduction of dichromate-ion Cr2O72- under these conditions?
A Cr3+
B Cr(OH)3
C Cr(OH)2
D [Cr(OH)6]3E Cr2O3
32
When copper (II) hydroxide enters into reaction with alkali, complex compounds are
produced. What is the coordination number of copper in such compounds?
A4
B5
C6
D3
E2
33
What of the following metals displaces hydrogen from hydrochloric acid?
A Aluminium
B Copper
C Mercury
D Aurum
E Platinum
34
Hybridization of one s- and 2 р-orbitals leads to formation of three sр2-hybrid
orbitals. Specify the angle between these orbitals:
A 120o
B 180o
C 109o
D 90o
E 104,5o
35
Which element has the same valence in both hydrogen compound and higher oxide?
A Carbon
B Phosphorus
C Selenium
D Bromine
E Argon
36
In order to determine CO2 in air the following substance can be applied:
A Water solution Ca(OH)2
B Water solution NaOH
C CaO
D Fe(OH)2
E Crystalline NaOH
37
To prepare 50 g of hypertonic sodium chloride solution with mass concentration 10% it is
necessary to take:
A 5 g of NaCl
B 0,5 g of NaCl
C 1 g of NaCl
D 25 g of NaCl
E 50 g of NaCl
38
For quantitative determination of some drugs the solutions of sulfuric and perchloric acids
are applied. Which of the following oxides are the anhydrides of these acids?
A SO3, Cl2O7
B SO2, Cl2O
C SO3, ClO2
D SO2, Cl2O7
E SO2, Cl2O7
39
Heme (a constituent part of hemoglobin) is a complex iron compound. It relates to the
following type of complex compounds:
A Chelate complex
B Acidocomplex
C Aquacomplex
D Cationic complex
E Hydroxocomplex
40
The 0,1 M solution of which substance has the smallest ion concentration?
A CH3COOH
B HCl
C CaCl2
D H2SO4
E NaNO3
41
Which compound was generated due to nonpolar covalent type of chemical bond?
A H2
B KCl
C NH4Cl
D KI
E H2S
42
In order to prepare 1 L of 0,1 М solution of sulfuric acid (M(H2SO4) = 98 g/mole) it is
necessary to take:
A 9,8 g of H2SO4
B 980 g of NaCl
C 0,098 g of NaCl
D 49 g of NaCl
E 98 g of NaCl
43
Which of the given bases is a weak electrolyte?
A Mg(OH)2
B Ca(OH)2
C Ba(OH)2
D NaOH
E KOH
44
Ions of which chemical element have an impact on the electrolytic balance of cerebral
tissues. What salt of this element is used for treating the psychic disorders?
A Li, Li2CO3
B Cl, NaCl
C I, KI
D Ca, CaCl2
E Mg, MgSO4
45
What salt does the expression
Kw
Kг =
Ka
for hydrolysis constant correspond with?
A NaCN
B Na2SO4
C (NH4)2SO4
D (NH4)3PO4
E CH3COONH4
46
If concentrated HNO3 interreacts with copper, it can be reduced to the following compound:
A NO2
B NO
C N2O
D N2
E NH4NO3
47
Manganese and chlorine demonstrate the most similar properties when they have the
following oxidation number:
A +7
B +3
C0
D +4
E +2
48
What is the molecular weight of an undefined gas knowing that its density is 20 relative to
the density of hydrogen?
A 40 g/mole
B 10 g/mole
C 20 g/mole
D 30 g/mole
E 50 g/mole
49
How much sodium hydroxide is required to prepare 500 g of 10% sodium hydroxide solution?
A 50 g
B 0,5 g
C 5g
D 10 g
E 25 g
50
0,1 M solution of the following acid has the highest concentration of hydrogen ions:
A HCl
B HCN
C H2CO3
D CH3COOH
E H2SO3
51
What is oxidation number of the central atom in the compound H[AuCl4]?
A +3
B0
C +1
D +2
E +4
52
When chlorine is passed through the cold solution of potassium hydroxide the following
compound are produced:
A KCl, KClO, H2O
B KCl, KClO2, H2O
C KCl, H2O
D KClO3, KClO, H2O
E KClO3, H2O
53
Specify the molecular formula of the oxide whose conjugate is permanganic acid:
A Mn2O7
B Mn3O4
C Mn2O3
D MnO2
E MnO
54
Presence of the following ion of d-elements in solutions can be exploited by means of K4[Fe(CN)6]:
A Fe3+
B Zn2+
C Cr3+
D Ni2+
E Cu2+
55
What substance can be used only as a reducing agent in oxidation-reduction reactions?
A Na2S
B Na2SO3
C Na2SO4
D Na2S2O7
E Na2S2O3
56
Potassium permanganate KMnO4 is used in medicine as a bactericidal drug. What
chemical properties of KMnO4 determine its bactericidal action?
A Oxidative
B Acidic
C Basic
D Reducing
E Heat-activated dissociability
57
Sodium hydrogen arsenate Na2HAsO4 * 7H2O is applied in medicine as general health-improving and
tonic drug. What type of salts does it relate to?
A Acid salts
B Neutral salts
C Basic salts
D Double salts
E Mixed salts
58
Solution with NaCl mass concentration of 0,95% is a part of a saline and can be used in
case of significant blood loss. Name reaction of this solution's medium:
A Neutral (pH = 7,0)
B Acidic (pH < 7,0)
C Alkaline (pH > 7,0)
D Very acidic (pH = 1,0)
E Very alkaline (pH = 12,0)
59
Choose a disulfate acid from the given acids:
A H2S2O7
B H2S2O5
C H2S2O8
D H2S
E H24O6
60
Coordination number of iron in the potassium hexacyanoferrate (II) K4[Fe(CN)6] is:
A6
B2
C4
D3
E8
61
As a result of reaction of mercury excess with diluted nitric acid the following gas will escape:
A NO
B NH3
C N2
D N2O
E-
62
Chloride lime is used in medicine as a disinfectant. Its formula is:
A CaCl(OCl)
B CaCl2
C Ca(ClO3)2
D Ca(ClO4)2
E CaOCl
63
Manganese tetrachloride is very unstable. It can be easily decomposed into:
A MnCl2 + Cl2
B Mn + Cl2
C Cl2
D Mn
E MnCl3 + Cl2
64
The product of potassium permanganate reduction in the neutral medium has the following
chemical formula and colour:
A MnO2, brown
B MnO2, green
C K2MnO4, green
D K2MnO4, violet
E MnSO4, colourless
65
What is maximal valency of nitrogen in consideration of donor-acceptor mechanism of
covalent bond?
A4
B1
C2
D3
E5
66
After the diluted solution of hydrochloric acid had been added to the solution under examination, the
white caseous precipitate settled down. This indicates presence of the following ions:
A Silver
B Ammonium
C Iron (II)
D Barium
E Iodine
67
Many elements have allotropic modifications. Specify the allotropic modification of oxygen:
A Ozone
B Phosgene
C Quartz
D Corundum
E Diamond
68
Hydrogen compounds of which element can form hydrogen bonds?
AF
BC
C Si
DP
EI
69
Specify the different-ligand complex compound that is used as an antitumour drug:
A [Pt(NH3)2Cl2]
B [Co(NH3)5NO3]Cl2
C Na4[Sn(OH)3Cl3]
D [Cu(NH3)4(SCN)2]
E K2Na[Co(NO2)6]
70
Which of the following substances does the concentrated sulphuric acid react with along
with production of SO2?
A Ag
B CuO
C NaCl
D Ca
E [Mg(NO3)2]
71
The strongest acid among the hydrohalic acids is:
A Hydroiodic
B Hydrofluoric
C Hydrochloric
D Hydrobromic
E-
72
An expression for the hydrolysis constant Kg=Kw/(Kacid *Kbase)
corresponds with the following salt:
A (NH4)2S
B NaCN
C Fe(NO3)3
D Li2S
E NH4Cl
73
The conversion MnO4A Reduction in neutral medium
B Oxidation in acidic medium
C Reduction in acidic medium
D Oxidation in alkaline medium
E Reduction in alkaline medium
MnO2 represents the following reaction:
74
The pH of 0,001 M of hydrochloric acid solution is:
A3
B0
C 10
D7
E5
75
The molar mass of calcium hydroxide equivalent (M(Ca(OH)2) = 74 g/mol) is:
A 37 g/mol
B 19 g/mol
C 32 g/mol
D 74 g/mol
E 148 g/mol
76
When ammonia enters into reaction with acids, this results in formation of ammonium salts.
Which properties of ammonia characterize this process?
A Ability to accept the hydrogen ions
B Reductive properties
C Acidic properties
D Oxidative properties
E Ability to hydrolyze
77
As a rule, the maximum oxidation number of an element is:
A Group number in the periodic system
B Subgroup number in the periodic system
C Period number
D Row number
E-
78
In which of these reactions hydrogen acts as an oxidizing agent?
A 2Na + H2
2NaH
B Cl2 + H2
2HCl
C CuO + H2
H2O + Cu
D N2 + 3H2
2NH3
E F2 + H2
2HF
79
What is the equivalent of Al(OH)3 in the reaction Al(OH)3 + 2HCl = Al(OH)Cl2 + 2H2O?
A 1/2 mol
B 1/3 mol
C 1 mol
D 2 mol
E 3 mol
80
Choose a reaction, in which a basic salt is formed:
A Fe(OH)3 + 2HCl
B Fe(OH)3 + 3KCl
C 2NaOH + H2SO4
D KOH + H2SO4
E NaOH + HCl