1

1 If NaCl is dissolved in distilled water in a beaker the following item is formed

2 Drinking water

3 Electrons

4 An elementary strucutal unit of the substance is

5 Nuclides 16,8 O & 17,8 O & 18,8 O

6 Protium, deuterium and tritium

7 The maximum number of electrons in the shell with the principal quantum number n=2 is

8 Neutron

9 Ionic compounds

10 Cations are ions which

11 If both electrons of th covalent bond ar provided only by one atom, the bond is

12 A single covalent bond

13 A hydrogen bind

14 Hydrogen bonds are formed

15 Van der Waals forces

16 A molecule

17 Slect the correct stataement about hydroxides witht he general formula M(OH)n

18 The ionization energy

19 Th electron shell with the principal quantum number n=3 can contain

20 In the moleculed of Ch2 = Ch2 the followinf bonds are represented

21 A single bond

22 A double bond

23 According to the Brönsted theory,a cids are

24 According to the Brönsted theory, bases are

25 Which of the following paris are conjugated of the following protolytic reaction NH3 + HCl <-> NH4+ + Cl-

26 The strength of acids and bases

27 The solution is acidic if

28 The solution is alkaline

29 The solution is alkaline if

30 The solution is acidic if

31 If the acidity constant of the nitrous acid is 4.5x10^-4, (log 4.5 = 0.65) then the following statement is true

32 The ionization cinstant of the base

33 Protolytic reaction

34 The strong and weak bases differ

35 The value of the product of ion concentrations of H3O+ and OH- (Kw)

36 True solutions are

37 Which of the following statements about osmosis is true

38 An aqueous solution of AgNO3 (Mr = 170) at the concentration of 0.5 mol.l^-1 contains

39 There are three aqueous solutions: A(NiCl2), c= 0.1 mol.l^-1; B (KCl), c = 0.15 mol.l^_1; C (sucrose), c =0.3 mol.l^-1. Select the correct statement

40 There is a physiological solution of NaCl (c = 0.15 mol.l^-1). Slect the solution which is isotonic wiht NaCl solution

41 There is a Ba(NO3)2 solution with a concentration of 0.2 mol. Select a solution which is hypertonic compared to the Ba(NO3)2 solution

42 Diffusion

43 The physiological solution is the water solution of NaCl (Mr = 58) with a concentration of 0.15mol. It may contain

44 In a saturated solution of a salt

45 Osmosis

46 Oxidation

47 Reductions

48 Oxidising agents are substances

49 The chromium atom has the oxidation number VI in the following compounds

50 The oxygen atom has the oxidation number -I in the following compounds

51 The manganese atom has the oxidation number VII in the following compounds

52 The phosphorus atom has the oxidation number III in the compounds

53 Which of the following statements is true for the chemical reaction Zn + CuSO4 <--> ZnSO4 + Cu

54 Which of the follwoing statements is true for the chemical reaction Fe + 2HCl (diluted) —> FeCl2 + H2:

55 If we immerse pieces of iron and zinc in a solution of ferrous and zinx salts, the reaction proceeds

56 For the oxidation-reduuction reaction schemes, select the appropriate partial reactions or verify tthat the stoichiometric coefficients are corect:

Cu+ HNO3 —> Cu(NO3)2 + NO2 + H2O

57 For the oxidation-reduuction reaction schemes, select the appropriate partial reactions or verify tthat the stoichiometric coefficients are corect:

SO2 + H2S —> S + H2O

58 For the oxidation-reduuction reaction schemes, select the appropriate partial reactions or verify tthat the stoichiometric coefficients are corect:

Na2Cr2O7 +HCl —> NaCl + CrCl3 + Cl2 + H2O

59 The rate of chemical reaction

60 Chemical equilibrium of the reaction 2 HBr <—> H2 + Br2 with the reaction heat Qm = #70 kJ.mol is shifted to the reactant side by

62 The activation energy of the reaction

63 For the reaction 2NO2 <—> N2O4: Qm = 57 kJ.mol the following statement applies

64 According to Hess’s law the value of reaction heat "Qm of a given reaction

65 For the exothermic reactions following statements apply

66 For endothermic reacitons following statements apply:

67 The reaction heat Qm is the heat, which:

68 Select the true statement about activation energy Ea:

69 Select the correct statement about hydrogen

70 Choose the correct statement about the occurrence of hydrogen isotopes (protium, deuterium, and tritium) in nature, mainly in water and organic compounds

71 Hydrogen

72 Oygen

73 Ozone

74 Select the correct statement about water

75 Individual atoms in water molecule:

76 The relatively high boiling point of water is caused by:

77 Which of the following statements about the hydrogen peroxide solution is true:

78 A molecule of hydrogen peroxide:

80 Permanent hardness of water:

81 Teproary hardness of water

82 Noble gases

83 At room temperature the elemts of group VIIIA (18)

84 Halogen atoms can reach the electron configuration of the clostest noble gas:

85 Cl2O and Cl2O7 are anhydrides of the following acids

86 A halgen with higher electronegativity:

87 Which of the followinf statements baout halogens is ture

88 Select the formula or name of a salt that is produced when chlorine oxoacid with ixodation number of a chlorine atom vII reacts with a reffour hydroxide;

89 Disinfectant chlorinated lime is a mixture of:

90 Which of the followinf statemnts about electronegativity of halogens is ture:

91 Which of the following statements about sulfut is true

92 Sulfur dioxide

93 Select the formula or name of a salt that is produced when sulfur oxoacid with an oxidation number of sulfur atom VI reacts with a ferrous hydroxide

95 Which of the following statements about the sulfuric acid is true

96 Molecules of nitrogen:

97 Which of the following statements about ammonia is true:

98 Nitirc acid

99 Which of the following statements about ammonium salts is true:

100 Which statement about phosphorus is true:

101 Phosphoric acid:

102 When 1 mol of trihydrogen phosphoric acid reacts with 1 mol of ferrous hydroxide the product is

103 Which statement about carbon (Z=6) is true:

104 Which statement about Co is true:

105 Which statement about carbon (Z=6) is true

106 Carbonic acid:

107 What is formed by the reacttion of 3 moles of sulfuric acid and 2 moles of aluminium hydroxide

108 Which of the statements about alkali metals is ture:

109 Elemetns s^2:

110 Which statement about s elements is true

111 Calcium oxide

112 s^1 elements

113 Which statement about d elements is true

115 In the coordination compound [Ni(NH3)6](NO3)2

116 The coordiantion number determines

117 In the coordiantion compound Na3[Sc(OH)6]

118 Molecules containing a coordinate bond are

119 Select the true statement about coordination compounds

120 Select the true statement about copper and its compounds

121 Select the correct names of the following compounds [Fe(H2O)6]Cl2 and Cs2[Pt(OH)6]

122 Select the correct statement about radioactivity

123 Which of the following statements about nuclrea radioactivity is true

124 Which statement about radioactivity is true

185 The electron configuration of the carbon atom in the excited state is:

186 characteristics of organic compounds depend:

187 In the methane molecule:

188 The compund wiith the formila: ^4CH3 - ^3CH2 - ^2CH2 - ^1CHO

191 Which of the following compounds exhibits cis-trans isomerism

193 The pair compounds CH3-CO-O-CH2-CH3 and CH3-CH2-O-CO-CH3 represents:

197 Which of the following compunds are optically active:

198 Alkynes are hydrocarbons:

199 Alkyls, R-:

202 The compound with the formula C6H5-CH=CH2 is:

203 CH3-CHO is:

206 The addition of water to ethene

207 The reaction of methane with clorine:

209 By the reaction CH2=CH-CH3 ü HBr —> the following compound is formed:

210 By the benzene nitration into the second stage, the followinf compund is formed as the main product

211 Nucleophilic substitution reactions are typical for

212 Which of the following reactions belong to the elimination

213 OH^-, Cl^-, and NH3 are:

214 Electrophilic additions

215 Nitration of benzene is

216 Radical addition is the reaction of benzene with

217 o- and p- (ortho- and para-) rienting sbstituenty on the aromatic ring are

218 Which of the following compounds are aromatic

219 Dehydrogenation of ethanol is

226 From ethylene the following compound can be formed

227 Compund CH2 = CHCl:

228 The reaction Ch4 + Br2 —> (300°C)/UV CH3Br + HBr is

229 Full hydrogenation of benzene leads to the production of

230 The compound CHCl3 is

231 Negative inductive effect -I is caused by the following group

234 Organic compounds with characteristics -SH group are

235 Dimethyl disulfide is formed by the oxidation of

236 Which of the following reactions may proceed

237 Hydroxy derivatives of hydrocarbons include

239 Hydroquinone belongs to

240 Which of the following compounds can be the product of methanol oxidations

241 Which of the following compunds can be the oxidation product of primary alcohol:

242 Alcohols

243 Product of dehydrogenation of secondary alcohol is

246 Ethylene glycol

247 Picric acid is

249 Which of the following compounds contain a hydroxy group directly bound to the aromatic ring

251 During the detection of the aldehydes with the Schiff reagent

252 Oxidation of hydroquinone results in the formation of

253 Formaldehyde

255 Chloroform is a trivial name for

256 By the dehydration of 1-butanol the following compound is formed

257 By the oxidation of ethylene glycol the following compound can be formed

259 By the oxidation of the hydroxyl group of glycerol on the secondary carbon atom the following compound is formed

260 Which of the following statements about CH3-CH2-SH is true

261 The reduction of disulfides reults in the formation of

262 By the oxidation of tethanethiol the following compound is formed

263 By the oxidation of Ch-3-CH2-Ch2-CH2-OH, the second step, the following compound is formed

266 The hydrogenation of acetone can form

268 The oxidation of the glycerol hydroxyl group at the primary carbon atom gives rise to

269 Fehling reagent is used to prove

270 Ethers have the general formula

271 Ethers

274 Pyrrole belongs to

275 Amines

277 Nitrogen occurs in the molecule of the following compounds

278 The compound CH3NH2 is

279 Primary amines

280 Amines

282 The simplest dicarboxylic acid is

283 The compound HOOC-CH2-COOH is

284 C6H5-COOH is the

285 Citirc acid

287 Fumaric acid is the acid

288 Esterification

289 Ethanoic acid may be formed

290 Which of the following statements about citric acid is true

291 Lactic acid

292 Which of the following statements about dicarboxylic acids is true

293 One mole of malonic acid reacts with (without rest)

294 The opposite of estrefication is

295 Which of the following formulas of carboxylic acids are paired with correct name

296 The correct formula for glutaric acid is

300 Carboxylic acid can be prepared

302 Saponification is

303 The simplest unsaturated dicarboxylic acid is

304 Carboxylic acid substitution derivatives include

305 Tartric acid

306 Acetylsalicyclic acid is

307 The compound Ch3-CO-CH2-COOH is

308 Substitution derivatives of carboxylic acids include

309 Neutral amino acids

312 Glutamic acid

313 The compound HOOC-CO-CH2-CH2-COOH

314 Trichloroacetic acid

315 Lactic acid may be formed

316 Acetone from acetoacetic acid may be formed

317 Acetyl is

318 The basic component of kidney stones is

319 The soap may be

321 The anhydride can be fromed by the release of the water molecule

324 Reaction of ethanoic acid with methanol gives

325 The internal anhydride is formed from the following acid

327 The structure -OOC-CH(OH)-CH2-COO^- belongs to

328 Which of the following compounds can be included to the functional derivatives of carboxylic acids

330 Soap can be

331 The carboxylic acid anhydride can be formed by cleaving the water molecule from

334 For the formation of the compound CH3-O-CO-C6H5 the following compounds may be involved

335 The compound CH3-O-CO-CH3 is generated from

337 Which of the follwing statements about simple lipids is true

338 Ester bond

339 To saturated long-chain fatty acids belong

340 Acylglycerols in their molecule can contain components

341 Biological functions of kipids are

342 To complex lipids belong

343 Triacylglcerols

344 Important nonpolar substances for human are

345 Which of the following compounds have hydrophobic properties

346 Essential long-chain carboxylic acids are

347 Complex lipids are compounds

348 In a polar part of complex lipids the following compound can be bound

349 In the nonpolar part of complex lipids the following compound is bound

350 Which of the folliwjnf lipids belong to glycolipids

351 Phospholipids

352 The essential carboxylic acids

354 Ergocalciferol

355 Which of the following substances belong to sterols

356 Which of the functional groups in cholesterol might be estrefied

357 Bile acids are required

358 Steroid compounds incldue

360 heterocyclic compounds or their derivatives include

361 A molecule of haemoglobin contains

362 Chlorophyll

363 Pyrrole can be found in biologically important substances such as

364 Nicotinamide

365 heterocyclic compounds

366 An important pyridine derivative is

367 Indicate which of the following compounds have an aromatic character

369 Which of the following statements about bile pigments is true

370 Nitrogen bases derived from pyrimidine are

371 Thymine is a compound derived from

372 Cytosine is a molecule derived from

373 The heterocyclic compounds with fused heterocycles include

374 Pyrimidine and imidazole rings can be found in the structure of

375 The compound containing components such as cytosine, ribose and phosphoric acid

376 Among the nucleoside triphosphate components, we can find the follwoing bond

377 Guanine is a heterocyclic compound

378 In human the uric acid is the final metabolic product

379 What types of nucleotides are found in DNA

380 Which of the following statements about deoxyribonucleic acid is true

381 RNA mainly contains following nitrogen bases

382 In nucleic acids following compounds can be found

383 Nucleotide is composed of

384 The double-stranded DNA helix (the secondary DNA structure) is stabilised by

385 The hydrogen bonds in the DNA molecule are formed between

386 Which of the following statements about DNA and RNA is true

387 In DNA complementary nitrogen bases are

388 Anticodon is

389 Ribosomal RNA is formed

390 The information about the amino acid sequence of the protein chain is encoded

391 The general formula C6H12O6 represents the following compound

392 Oxidation of substance “X” yields gluconic acid. Which of the following statements about the substance “X” is true

393 Glucose is

394 Which of the following compounds belong to monosaccharides

395 Glyceraldehyde

396 Cylcic form of monosaccharides is

397 Which of the following substances can participate in the formation of hemiacetals

398 Monosaccharides participate in

399 Glucose is formed by

400 Mannitol is

401 Formula C6H12O6 may belongs to

402 Formation of glycosidic bond is

403 Which of the following statements about monosaccharides is true

404 Galactose is

405 Which of the following statements about oxidation and reduction of saccharides is true

409 Which of the following compounds give positive Fehlings test

410 Which of the following statements about monosaccharides is true

411 Glocse-6-phosphate is

412 Fructose

413 Mannose

414 Ribose

415 Which of the following compounds have not reducing properties

416 Milk sugar is

417 Galactose is

418 During maltose hydrolysis the following compound is formed

419 Conversion of maltose to glucose is the reaction

420 Maltose

421 Sucrose is

422 Polysaccharides

423 Starch is

424 In the molecule of starch there are

425 Starch is not present in

426 Which of the following compounds belong to polysaccharides of animal origin

427 Glyogen

428 Cellulose is

429 The molcule of cellulose contains

430 Glycogen is

431 Complete hydrolysis of starch gives rise to a product which

432 In the glycogen molecule we can find

433 Partial hydrolysis of starch amylase generates

434 The branched structure has a molecule of

435 1,6-glycosidic bond

436 Non essential amino acids

437 Amino acid with an aromatic ring is

438 Acidic amino acids

439 Basic amino acids

441 Which of the following statemnts about amino acids in proteins of the human organism is true

442 Essential amino acids

443 Which of the following amino acids contains the -OH group in the molecule

446 Which of the following statements about peptide bond is true

447 During the transamination there are formed amino acids

448 The primary structure of proteins

449 A final (waste) product of the protein metabolism in humans

451 Glycine

452 Glutamic acid

453 Which of the following statements about the secondary structure of proteins is true

454 By protein denaturation

455 Proteins

456 Oxygen

457 Water in the organism

458 The endergonic reactions are associated with

459 Acetyl coenzyme A can be produced

460 Dehydrogenation is

461 The Krebs cycle proceeds in the cell

462 The final product of glucose oxidation in the human under anaerobic conditions is

463 Which of the following proceeds in mitochondria

464 Lipase is

465 Enzymes

466 Coenzyme

467 For the substrate specificity of an enzyme there is responsible

468 pH-optimum of an enzyme

469 Pepsin

470 Competitive inhibition is a type of enzyme inhibition when

471 Enzymes are classified

472 Hydrolases are

473 The energy in the form of ATP is

474 Oxidations of substrates

475 Vitamins

476 Which of the following statements about citric acid cycle is true

477 Glucose

478 Glycolysis

479 Acetyl CoA

480 Which of the following statements about the synthesis of fatty acids is true

481 Estrogens are

482 Following product are synthesised in the anterior pituitary (adenohypophysis)

483 In the medulla of adrenal gland the following compound is formed

484 Insulin

485 Which of the following compounds has the opposite effect of insulin on carbohydrate metabolism

486 Testosterone

487 The secretion of progesterone

488 Steroid nature have

489 The synthesis of glycogen in liver cells is supported by

490 Testicles mainly produce

491 Riboflavin

492 Vitamin K is needed for

493 Retinol participates in

494 Vitamin D3

495 The sulfur atom is present in the molecule of

496 Blood clotting disorders occur in

497 Scurvy is

498 Vitamin B12

499 Vitamins

500 Which of the following compounds does not belong to provitamins