Zadanie 1
How many oxygen atoms are present in 0.0200 mol of aluminium sulfate, Al2(SO4)3? NA = 6.02 × 1023 mol−1 A. 1.20 × 1022 B. 4.82 × 1022 C. 1.44 × 1023 D. 1.44 × 1024
Chemistry HL Paper 1, November 2022
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
Iodine crystals placed in a warm flask turn directly into purple vapour without forming a liquid. Which term describes this change of state? A. Boiling B. Evaporation C. Deposition D. Sublimation
Zadanie 3
How many moles of carbon dioxide are produced by the complete combustion of 14.5 g of butane, C4H10? Mr = 58 A. 0.25 B. 0.50 C. 1.00 D. 1.25
Zadanie 4
Successive ionization energies of an element, Z, are shown. What energy, in kJ mol−1, is required to convert one mole of gaseous atoms of Z into the ions that Z forms in its ionic compounds? A. 2700 B. 4500 C. 5100 D. 16 700
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Zadanie 5
Which quantities are different between the species and ? A. Number of protons only B. Number of protons and neutrons only C. Number of neutrons and electrons only D. Number of protons, neutrons and electrons
Zadanie 6
An aqueous solution of copper(II) sulfate is blue because of the [Cu(H2O)6]2+ ion. Use section 15 of the data booklet if needed. Which statement best explains the colour? A. Blue light is absorbed when electrons are promoted between split d orbitals…
Zadanie 7
Which elements are metalloids? I. Silicon II. Antimony III. Bismuth A. I and II only B. I and III only C. II and III only D. I, II and III
Zadanie 8
Which property of the elements generally increases from left to right across period 3 and decreases down group 17? A. Atomic radius B. Electronegativity C. Metallic character D. Ionic radius
Zadanie 9
Which species can be represented by resonance structures? A. PCl3 B. O3 C. CH3OH D. OF2
Zadanie 10
Which elements are capable of forming molecules or ions with an expanded octet? I. Chlorine II. Carbon III. Sulfur A. I and II only B. I and III only C. II and III only D. I, II and III
Zadanie 11
Which molecule has a tetrahedral molecular geometry? A. PCl5 B. ClF3 C. SeF4 D. SO2F2
Zadanie 12
A pure metal is mixed with a small amount of a second metal whose atoms have a different radius. The regular arrangement of atoms is distorted, so the layers can no longer glide past one another easily. Which property of the metal will increase as a result? A.…
Zadanie 13
The average bond lengths of three carbon-halogen bonds are shown. What is the order of increasing bond strength? A. C−Cl < C−Br < C−I B. C−I < C−Br < C−Cl C. C−Br < C−I < C−Cl D.…
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Zadanie 14
What is the enthalpy of formation of ethane, C2H6(g), calculated from the enthalpies of combustion below? C(s) + O2(g) → CO2(g), ΔH = −394 kJ mol−1 , ΔH = −286 kJ mol−1…
Zadanie 16
Which substance has the highest standard molar entropy, S⊖, at 298 K? A. NaCl(s) B. H2O(l) C. CH4(g) D. C2H6(g)
Zadanie 17
A reaction has a negative ΔH and a negative ΔS. Which statement about the spontaneity of the reaction is correct? A. It is spontaneous at all temperatures B. It is spontaneous only at high temperatures C. It is spontaneous only at low…
Zadanie 18
The graph shows how the concentration of a reactant changes with time. What initial rate of reaction, in mol dm−3 s−1, can be determined from the graph? A. 0.1 B. 0.2 C. 0.5 D. 2.0
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Zadanie 19
Marble chips react with dilute hydrochloric acid. Which combination of changes would decrease the rate of reaction? A. Concentration of acid increased; marble chips replaced by larger chips B. Concentration of acid decreased; marble chips replaced by larger…
Zadanie 20
The following data were obtained at constant temperature for the reaction 2 NO(g) + Br2(g) → 2 NOBr(g). What rate equation can be deduced from the data? A. Rate = k[NO][Br2] B. Rate = k[NO]2[Br2] C.…
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Zadanie 21
The Arrhenius equation relates the rate constant, k, of a reaction to the absolute temperature, T. Which graph gives a straight line with a gradient equal to −Ea/R? A. k against 1/T B. ln k against T C. ln k against 1/T D.…
Zadanie 22
For the reaction N2(g) + 3 H2(g) ⇌ 2 NH3(g) at a certain temperature, the equilibrium concentrations, in mol dm−3, are: [N2] = 0.10, [H2] = 0.20, [NH3] = 0.40 What is the value of Kc? A. 0.0050 B. 8.0 C.…
Zadanie 23
Iron(III) ions and thiocyanate ions react to form a blood-red complex ion. Fe3+(aq) + SCN−(aq) ⇌ [FeSCN]2+(aq) Which of these changes would shift the equilibrium to the right? I. Addition of solid potassium thiocyanate, KSCN II. Addition of…
Zadanie 24
Equal volumes of 0.050 mol dm−3 ethanoic acid and 0.050 mol dm−3 hydrochloric acid are each titrated with 0.050 mol dm−3 sodium hydroxide solution. Which quantity is the same for the two titrations? A. Initial pH…
Zadanie 25
Which acid has the weakest conjugate base? A. HF B. CH3COOH C. HNO3 D. NH4+
Zadanie 26
Which pair of solutions will form a buffer when mixed? A. 25 cm3 of 0.20 mol dm−3 HCl and 25 cm3 of 0.20 mol dm−3 NaOH B. 25 cm3 of 0.20 mol dm−3 NH3…
Zadanie 27
Which species can act as a Lewis base but not as a Lewis acid? A. BF3 B. Fe3+ C. NH3 D. H+
Zadanie 28
A voltaic cell is based on the reaction Zn(s) + Ni2+(aq) → Zn2+(aq) + Ni(s) The half-cells are connected by a salt bridge containing aqueous potassium nitrate. What happens when the cell operates? A. Electrons flow from Ni to Zn; anions in the…
Zadanie 29
What is the value of c when the equation below is balanced using the smallest whole numbers? a Cu(s) + b NO3−(aq) + c H+(aq) → d Cu2+(aq) + e NO2(g) + f H2O(l) A. 2 B. 3 C. 4 D. 6
Zadanie 30
Some standard electrode potentials for copper are shown. Cu2+(aq) + e− ⇌ Cu+(aq), E⊖ = +0.15 V Cu+(aq) + e− ⇌ Cu(s), E⊖ = +0.52 V Cu2+(aq) + 2 e− ⇌ Cu(s), E⊖ = +0.34 V…
Zadanie 32
Which of the structures I, II and III are structural isomers of C4H8? A. I and II only B. I and III only C. II and III only D. I, II and III
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Zadanie 33
Which compound contains a chiral carbon atom? A. 1-chlorobutane B. 2-chloropentane C. 3-chloropentane D. 2-chloropropane
Zadanie 34
Which conditions best favour the oxidation of butan-1-ol to butanal rather than to butanoic acid? A. Excess oxidizing agent, heated under reflux B. Excess oxidizing agent, heated with the product distilled off as it forms C. Limited oxidizing agent, heated…
Zadanie 38
What information about pentan-2-one, CH3COCH2CH2CH3, can be obtained from mass spectrometry (MS), infrared (IR) spectroscopy and 1H NMR spectroscopy? A. MS: the compound contains a carbonyl group; IR: the molar mass is 86 g mol−1;…
Zadanie 40
Which compound gives the low-resolution 1H NMR spectrum shown? A. Ethanal B. Ethanoic acid C. Methyl ethanoate D. Propanone
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