Zadanie 1
Which hydrocarbon forms 4 mol of H2O for every 3 mol of CO2 upon complete combustion? A. C3H4 B. C3H6 C. C4H10 D. C3H8
Chemistry SL Paper 1, November 2023, TZ1
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
Metal M reacts with 8.00 g of oxygen to produce 28.0 g of the oxide MO2. What is the relative atomic mass of M? A. 20 B. 40 C. 80 D. 160
Zadanie 3
A mixture of 44.1 g of propane and 192 g of oxygen is ignited and reacts until one reactant is used up, according to the equation. C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(l) Which substances are present in the vessel once the reaction has finished? A.…
Zadanie 4
Ethane burns completely in oxygen to give carbon dioxide and water. C2H6(g) + O2(g) → CO2(g) + H2O(l) What is the C2H6 : O2 mole ratio in the balanced equation, written with the smallest whole-number coefficients? A. 1:3 B. 2:5 C. 2:7 D.…
Zadanie 5
Thallium (Ar = 204.38) consists of two stable isotopes, and . What is the relative abundance of ? A. 31 % B. 38 % C. 62 % D. 69 %
Zadanie 6
Which electron configuration is the ground-state configuration of an atom of a d-block element? A. 1s22s22p63s23p64s23d4 B. 1s22s22p63s23p64s13d5 C. 1s22s22p63s23p64s23d104p1 D.…
Zadanie 8
Which property generally decreases as the first ionization energy of elements increases? A. Atomic radius B. Electronegativity C. Non-metallic character D. Acidity of the oxide
Zadanie 9
The periodic table in the data booklet shows 118 elements. A new element with atomic number 120 is made. It would be expected to have chemical properties most similar to which element? A. Francium B. Radium C. Actinium D. Radon
Zadanie 10
The formula of yttrium sulfate is Y2(SO4)3. What is the formula of yttrium nitrate? A. YNO3 B. Y(NO3)2 C. Y2(NO3)3 D. Y(NO3)3
Zadanie 12
What are the electron domain geometry and the molecular geometry of the nitrite ion, NO2−? A. trigonal planar and bent B. trigonal planar and trigonal planar C. tetrahedral and bent D. linear and linear
Zadanie 13
Which substance evaporates easily when pure and gives a strongly conducting solution in water? A. HBr B. KBr C. CH3Br D. NH3
Zadanie 14
Which changes are exothermic? I. CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l) II. Cl(g) + e− → Cl−(g) III. H2O(l) → H2O(g) A. I and II only B. I and III only C. II and III only D. I, II and III
Zadanie 15
Which expression gives the value of ΔH⊖, in kJ, for the formation of one mole of NO2(g) from its elements, ? A. −180 + 114 B. 0.5 × (−180) + 0.5 × 114 C. 0.5 × 180 − 0.5 × 114 D. 0.5 × 180 + 0.5 × 114
- Tabela do uzupełnienia
Zadanie 16
The diagram shows the enthalpy profile of an exothermic reaction. Arrows I, II and III show energy differences on the profile. Which expression gives ΔH for the forward reaction? A. II − I B. I − II C. I + II D. III − II
- Materiał graficzny
Zadanie 17
Which statement correctly explains why a reaction is faster when a catalyst provides an alternative reaction pathway? A. It raises the average kinetic energy of the reacting particles. B. It lowers the activation energy, so a greater proportion of collisions…
Zadanie 18
Which equilibrium would shift to the left when the pressure is increased at constant temperature? A. H2(g) + I2(g) ⇌ 2 HI(g) B. C(s) + CO2(g) ⇌ 2 CO(g) C. N2(g) + 3 H2(g) ⇌ 2 NH3(g) D. 2 NO2(g) ⇌ N2O4(g)
Zadanie 19
What is the formula of the conjugate base of methanoic acid, HCOOH? A. HCOOH2+ B. H3O+ C. HCOO− D. OH−
Zadanie 21
In which compound does manganese have an oxidation state of +4? A. Mn(NO3)2 B. Mn2(SO4)3 C. Mn3(PO4)4 D. Mn3(PO4)5
Zadanie 22
Zinc reacts with an aqueous solution of ethanoic acid. Zn(s) + 2 CH3COOH(aq) → Zn(CH3COO)2(aq) + H2(g) Which combination shows the role of the acid and the gas formed? A. oxidizing agent, H2(g) B. oxidizing agent, CO2(g) C. reducing agent,…
Zadanie 23
A voltaic cell is set up with the cell diagram and a salt bridge containing aqueous potassium nitrate. Which statements are correct while the cell operates? I. The mass of the silver electrode…
Zadanie 24
Which species attacks a molecule of ethane in the first propagation step of its reaction with chlorine in ultraviolet light? A. chlorine atom, Cl ⋅ B. chlorine molecule, Cl2 C. chloride ion, Cl− D. hydrogen chloride molecule, HCl
Zadanie 25
Which pair of compounds are structural isomers? A. CH3CH2CH2OH and CH3CH2CHO B. CH3COOH and CH3CH2OH C. CH3CH2COOH and CH3CH2CH2COOH D. CH3COOCH3 and CH3CH2COOH
Zadanie 26
How are the amine and the alcohol shown classified? A. primary amine and primary alcohol B. tertiary amine and secondary alcohol C. primary amine and secondary alcohol D. secondary amine and secondary alcohol
- Materiał graficzny
Zadanie 27
2-Methylpropan-1-ol is heated with an acidified oxidizing agent and the first product is distilled off as it forms. What is this product? A. (CH3)2CHCOOH B. (CH3)2CHCHO C. (CH3)2CHCH2OH D. CH3COCH2CH3
Zadanie 28
A student determines the concentration of an ethanoic acid solution by titration against standard NaOH(aq) from a burette. Which action would introduce a systematic error? A. Reading the burette at slightly different eye levels in each trial B. Using a…
Zadanie 29
A fixed amount of magnesium reacts with hydrochloric acid, which is added in increasing amounts. After each addition the reaction is allowed to finish. Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g) Which graph shows how the amount of hydrogen formed changes…
- Materiał graficzny
Zadanie 30
Which data can be used to determine the empirical formula of an unknown hydrocarbon? A. The enthalpy change of combustion of the hydrocarbon B. The boiling point and density of the hydrocarbon C. The molar mass of the hydrocarbon D. The masses of carbon…