Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
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