Zadanie 1
A student mixes 100 cm3 of 0.50 mol dm−3 calcium chloride solution with 150 cm3 of 1.00 mol dm−3 potassium chloride solution. What is the concentration of chloride ions, in mol dm−3, in…
Chemistry HL Paper 1, May 2022, TZ2
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
Dodaj cały arkusz do zestawuZadanie 2
A compound contains only carbon, hydrogen and oxygen. Complete combustion of 4.60 g of the compound produces 8.80 g of carbon dioxide and 5.40 g of water as the only products. Which is the empirical formula of the compound?…
Zadanie 3
Which graph represents the relationship between the pressure, P, and the volume, V, of a fixed amount of an ideal gas at constant temperature, according to PV = nRT? A. Graph A B. Graph B C. Graph C D. Graph D
- Materiał graficzny
Zadanie 4
Which value is the relative atomic mass of the element that gives the mass spectrum shown below? A. 40 B. 41 C. 42 D. 44
- Materiał graficzny
Zadanie 5
What is the correct order of increasing first ionization energy? A. N < O < F B. O < N < F C. F < N < O D. O < F < N
Zadanie 6
Which pair of elements, one from group 1 and one from group 17, is expected to react together least vigorously? A. lithium and chlorine B. lithium and iodine C. sodium and bromine D. potassium and chlorine
Zadanie 7
Which of the following ions are expected to be paramagnetic? I. V3+ II. Mn2+ III. Cu+ A. I and II only B. I and III only C. II and III only D. I, II and III
Zadanie 8
The complex ion [Co(H2O)6]3+ is blue and the complex ion [Co(NH3)6]3+ is orange. The colour absorbed by a complex is complementary to the colour observed. The colour wheel gives the wavelength of light of each colour. What is correct about the…
- Materiał graficzny
Zadanie 9
Which compound has bonding that is best described as predominantly ionic? Use sections 9 and 17 of the data booklet. A. NO2 B. ICl C. BaO D. SiH4
Zadanie 10
What is the main attraction between molecules in liquid carbon tetrachloride, CCl4? A. Hydrogen bonding B. Ionic attraction C. Dipole–dipole forces D. London (dispersion) forces
Zadanie 11
What is the formal charge of the boron atom in the tetrafluoroborate ion, BF4−, in which boron is bonded to each of four fluorine atoms by a single bond? A. −3 B. −1 C. 0 D. +1
Zadanie 12
What is the molecular geometry of ClF3? A. Trigonal planar B. Trigonal pyramidal C. Trigonal bipyramidal D. T-shaped
Zadanie 13
Identical pieces of zinc, each of mass 0.65 g, are added to two solutions of hydrochloric acid, X and Y, at the same initial temperature. Each reaction takes place in an identical insulated container and the mixture is stirred. Which statement is…
- Tabela do uzupełnienia
Zadanie 15
Which row gives the signs of ΔH and ΔS for a reaction that is spontaneous at low temperatures but non-spontaneous at high temperatures? A. ΔH < 0, ΔS < 0 B. ΔH < 0, ΔS > 0 C. ΔH > 0, ΔS < 0 D.…
Zadanie 16
Which equation represents the bond enthalpy of the H–Cl bond in hydrogen chloride? A. B. HCl(g) → H+(g) + Cl−(g) C. HCl(g) → H(g) + Cl(g) D. HCl(aq) → H(g) + Cl(g)
Zadanie 17
Dividing both sides of the equation ΔG⊖ = ΔH⊖ − TΔS⊖ by −T gives −ΔG⊖/T = −ΔH⊖/T + ΔS⊖. Which term represents the entropy change of the surroundings? A. −ΔG⊖/T…
Zadanie 18
Why does a powdered solid react faster with a dilute acid, at the same temperature, than a single lump of the same mass of the solid? A. Collisions between particles are more frequent. B. Collisions between particles are more energetic. C. The activation…
Zadanie 19
Nitrogen dioxide reacts with fluorine as shown below. 2 NO2(g) + F2(g) → 2 NO2F(g) rate = k[NO2][F2] How does the rate of disappearance of NO2 compare with that of F2? A. NO2 disappears at half the rate of…
Zadanie 20
Which energy profile diagram represents an exothermic SN2 reaction of a primary halogenoalkane with a nucleophile? A. Diagram A B. Diagram B C. Diagram C D. Diagram D
- Materiał graficzny
Zadanie 21
In the Arrhenius equation, , which statement about the factor A is correct? A. It is the minimum energy needed for a successful collision. B. It is related to the frequency of collisions with the proper orientation. C. It is the…
Zadanie 22
The equilibrium constant, Kc, for the reaction A + 2 B ⇌ 3 C + D has a value of 3.0 at a certain temperature. What is the value of Kc for the reaction below at the same temperature? 6 C + 2 D ⇌ 2 A + 4 B A. 0.11 B. 0.33 C. 1.5 D. 9.0
Zadanie 23
A closed flask is filled with 1.0 mol of carbon monoxide and 1.0 mol of steam, and the mixture reaches equilibrium according to the equation below. CO(g) + H2O(g) ⇌ CO2(g) + H2(g) At equilibrium the flask holds 0.75 mol of CO2. What is…
Zadanie 24
What happens to the amount of hydrogen ions and to the hydrogen ion concentration when water is added to a solution of ethanoic acid, CH3COOH(aq)? A. n(H+) decreases; [H+] decreases B. n(H+) increases; [H+] decreases C.…
Zadanie 25
What is the strongest base in the equilibrium below? NH3 + H2O ⇌ NH4+ + OH− Kb = 1.8 × 10−5 A. NH3 B. H2O C. NH4+ D. OH−
Zadanie 26
A weak acid is titrated with sodium hydroxide solution. Which value of pKa can be estimated from this titration curve? A. 8.4 B. 4.2 C. 2.6 D. 12.3
- Materiał graficzny
Zadanie 27
Which of these species can act as both a Lewis base and a Brønsted–Lowry base? I. CH3NH2 II. BF3 III. H2O A. I and II only B. I and III only C. II and III only D. I, II and III
Zadanie 28
Which combination best describes what is happening to propene, CH3CH=CH2, in the equation below? CH3CH=CH2(g) + H2(g) → CH3CH2CH3(g) A. Oxidation and addition B. Oxidation and substitution C. Reduction and addition D. Reduction and substitution
Zadanie 29
A battery is connected in a circuit. The arrows show the direction of electron flow. What does terminal X of the battery represent? A. Anode and positive terminal B. Anode and negative terminal C. Cathode and positive terminal D. Cathode and negative terminal
- Materiał graficzny
Zadanie 30
Which E⊖ value, in V, for the reaction Mg(s) + Fe2+(aq) → Mg2+(aq) + Fe(s) can be deduced from the following equations? Mg(s) + 2 Ag+(aq) → Mg2+(aq) + 2 Ag(s) E⊖ = 3.17 V…
Zadanie 32
Which sequence of reagents converts but-1-ene into butanone? Each reagent is added to the product of the previous reaction. A. HBr, then NaOH(aq), then acidified K2Cr2O7(aq) B. HBr, then acidified K2Cr2O7(aq), then…
Zadanie 33
How many structural isomers of dichloropentane, C5H10Cl2, can be formed by the free-radical substitution of CH3CH2CH2CH2CH3 with excess Cl2 in the presence of UV light? Ignore stereoisomers. A. 5 B. 7 C. 9 D. 12
Zadanie 34
Which set of formulas is a homologous series? A. CH4, C2H4, C3H4 B. C2H6, C3H6, C4H6 C. C3H8, C3H6, C3H4 D. C2H4, C3H6, C4H8
Zadanie 35
Which reaction involves homolytic fission of a bond? A. C2H6 + Br2 in the presence of UV light B. CH3CH2Br + NaOH(aq) warmed C. CH2=CH2 + HBr at room temperature D. C6H6 + Br2 with FeBr3 as catalyst
Zadanie 36
Which structure represents a repeating unit of the polymer formed from chloroethene, CH2=CHCl? A. −CH2−CHCl− B. −CH2−CH2− C. −CHCl−CHCl− D. −CH2−CCl2−
Zadanie 37
What is the main organic product of the reduction of butanone with LiAlH4 in dry ether? A. Butanoic acid B. Butan-1-ol C. Butan-2-ol D. Butanal
Zadanie 38
How many different signals does the 1H NMR spectrum of this compound show? A. 1 B. 2 C. 3 D. 4
- Materiał graficzny
Zadanie 39
A solution of barium hydroxide of concentration 0.10 mol dm−3 was added dropwise to 25 cm3 of copper(II) sulfate solution of concentration 0.10 mol dm−3 until 25 cm3 of the barium hydroxide solution had…
- Materiał graficzny
Zadanie 40
Equimolar samples of the following compounds are dissolved in a solvent that gives no 1H NMR signal. Which compound gives the signal with the greatest area in its 1H NMR spectrum? A. C6H6 B. CH3CH2CH2CH2CH2CH2CH2CH3 C. (CH3)4C D.…