Zadanie 1
What is the number of hydrogen atoms in 0.0500 mol of hydrated magnesium sulfate, MgSO4 ⋅ 7 H2O? A. 3.01 × 1022 B. 4.21 × 1023 C. 2.11 × 1023 D. 4.21 × 1022
Chemistry SL Paper 1A, May 2025, TZ3
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 30 zadań z tego arkusza, razem 30 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Reacting masses, volumes and concentrations (2), pH scale and hydrogen ion concentration (2).
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Dodaj cały arkusz do zestawuZadanie 2
Which of the following could be the empirical formula of a compound with Mr = 70? I. CH2 II. C4H6O III. C5H10 A. I and II only B. I and III only C. II and III only D. I, II and III
Zadanie 3
What volume of propane gas, in cm3, must be burned completely in oxygen to give 90 cm3 of carbon dioxide, all volumes being measured at the same temperature and pressure? C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g) A. 18 B. 30 C. 90 D.…
Zadanie 4
Which set correctly shows the numbers of protons, neutrons and electrons in ? A. Protons 29, neutrons 36, electrons 31 B. Protons 29, neutrons 36, electrons 27 C. Protons 27, neutrons 65, electrons 27 D. Protons 65, neutrons 65, electrons 29
Zadanie 5
How many electrons, at most, can be held in the fifth main energy level (n = 5) of an atom? A. 10 B. 25 C. 32 D. 50
Zadanie 6
Calcium ions and phosphate(V) ions combine to form an ionic compound. What is its formula? A. CaPO4 B. Ca2(PO4)3 C. Ca3(PO4)2 D. Ca3(PO3)2
Zadanie 7
A white crystalline solid has the properties shown in the table. Which structure is consistent with these properties? A. Giant metallic lattice B. Giant covalent network C. Molecular covalent solid D. Giant ionic lattice
- Tabela do uzupełnienia
Zadanie 8
Hydrogen fluoride boils at 20 °C, whereas hydrogen chloride boils at −85 °C. Which type of intermolecular force accounts for the much higher boiling point of hydrogen fluoride? A. Hydrogen bonding B. Dipole-dipole forces C. London (dispersion) forces D.…
Zadanie 9
Which list arranges the metals in order of increasing strength of metallic bonding (weakest first)? A. Rb, Mg, Na, Al B. Al, Mg, Na, Rb C. Rb, Na, Mg, Al D. Na, Rb, Al, Mg
Zadanie 10
Which monomer could produce this polymer? A. CH2ClCH2Cl B. CHCl2CH3 C. CH2=CHCl D. CH2=CCl2
- Materiał graficzny
Zadanie 11
Which element belongs to the f-block of the periodic table? A. Nd B. Fr C. Ta D. Pb
Zadanie 12
Which electron configuration is correct for a chromium atom, Cr, in its ground state? A. [Ar] 4s1 3d5 B. [Ar] 4s2 3d4 C. [Ar] 3d6 D. [Ar] 4s2 4d4
Zadanie 13
Which pair of elements reacts together most vigorously? A. Sodium and bromine B. Potassium and bromine C. Sodium and chlorine D. Potassium and chlorine
Zadanie 14
In which species does an atom have the oxidation state +5? I. IF5 II. H3PO4 III. N2O4 A. I and II only B. I and III only C. II and III only D. I, II and III
Zadanie 15
Which two functional groups occur in both molecule P and molecule Q? A. Amino and a benzene ring B. Hydroxyl and ester C. Hydroxyl and a benzene ring D. Amino and hydroxyl
- Materiał graficzny
Zadanie 16
Which row correctly describes an endothermic reaction? A. The temperature of the surroundings rises and the products are more stable than the reactants. B. The temperature of the surroundings falls and the products are more stable than the reactants. C. The…
Zadanie 17
When 0.601 g of propan-1-ol is burned, the heat released raises the temperature of 250 cm3 of water by 8.00 K. What is the enthalpy of combustion of propan-1-ol, in kJ mol−1, calculated from these results? Specific heat capacity of…
Zadanie 18
Which route to chloroethane has an atom economy of 100 %? A. C2H5OH + PCl5 → C2H5Cl + POCl3 + HCl B. C2H6 + Cl2 → C2H5Cl + HCl C. C2H5OH + HCl → C2H5Cl + H2O D. C2H4 + HCl → C2H5Cl
Zadanie 19
Which of the following could be used to follow the progress of the reaction between calcium carbonate and dilute nitric acid? CaCO3(s) + 2 HNO3(aq) → Ca(NO3)2(aq) + H2O(l) + CO2(g) I. A balance recording the mass of the open flask and its contents II. A…
Zadanie 20
Iron(III) ions and thiocyanate ions form a deep red complex ion in aqueous solution. Fe3+(aq) + SCN−(aq) ⇌ [Fe(SCN)]2+(aq) Which of the following correctly predicts the effect of a change on this equilibrium? A. Adding iron(III) nitrate solution…
Zadanie 21
What amount of oxygen, in mol, is required to burn 8.72 g of butane, C4H10(g), completely? M(butane) = 58.14 g mol−1 A. 0.0231 B. 0.150 C. 0.975 D. 1.95
Zadanie 22
Which molecule has the shortest carbon to carbon bond? A. C2H6 B. C2H4 C. C6H6 D. C2H2
Zadanie 23
What are the electron domain geometries around the nitrogen atom and the carbon atom bonded directly to it, in alanine, H2NCH(CH3)COOH? A. Trigonal planar (C), trigonal pyramidal (N) B. Tetrahedral (C), trigonal pyramidal (N) C. Trigonal pyramidal (C),…
Zadanie 24
What is the pH of a 0.020 mol dm−3 solution of nitric acid, HNO3(aq)? A. 1.0 B. 1.7 C. 2.0 D. 12.3
Zadanie 25
Which of these solutions has a pH greater than 7 at 25 °C? A. [H+] = 1.0 × 10−5 mol dm−3 B. [OH−] = 1.0 × 10−10 mol dm−3 C. [H3O+] = 1.0 × 10−11 mol dm−3 D.…
Zadanie 26
Which equation correctly represents a reaction of dilute sulfuric acid? A. H2SO4 + MgCO3 → MgSO4 + CO2 + H2O B. H2SO4 + 2 Ag → Ag2SO4 + H2 C. H2SO4 + 2 KOH → K2SO4 + H2 D. H2SO4 + 2 NaHCO3 → Na2SO4 + 2 H2O
Zadanie 27
Cadmium was added to separate solutions of silver nitrate and chromium(III) nitrate. Cd(s) + 2 AgNO3(aq) → Cd(NO3)2(aq) + 2 Ag(s) Cd(s) + Cr(NO3)3(aq): no reaction Which list places the three metals in order from most reactive to least reactive?…
Zadanie 28
Molten lead(II) bromide, PbBr2(l), is electrolysed using inert electrodes. Which products form at the electrodes? A. Anode: Br2, cathode: Pb B. Anode: O2, cathode: Pb C. Anode: Pb, cathode: Br2 D. Anode:…
Zadanie 29
Reduction of which compound gives pentan-2-ol? A. Pentan-2-one B. Pentan-3-one C. Pentanal D. Pentanoic acid
Zadanie 30
Which is a conjugate acid-base pair? A. H2CO3 / CO32− B. H2SO4 / SO42− C. HSO4− / SO42− D. CH3NH3+ / CH3NH−