Zadanie 1
A hydrocarbon burns completely in excess oxygen. The amounts of carbon dioxide and water formed are in the mole ratio 3 : 2. Which hydrocarbon is it? A. C2H6 B. C3H6 C. C3H4 D. C4H10
Chemistry SL Paper 1, November 2023, 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
When 10.65 g of chlorine gas is passed over a metal M, 13.35 g of the compound MCl3 is formed and no reactant is left over. Which value is the relative atomic mass of M? A. 9 B. 18 C. 27 D. 133
Zadanie 3
A sealed vessel contains 4.41 g of propane and 24.0 g of oxygen, which react according to the equation. C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(l) Which substances are present in the vessel after the reaction is complete? A. CO2(g) and H2O(l)…
Zadanie 4
Liquid octane burns completely in oxygen to give carbon dioxide and liquid water. C8H18(l) + O2(g) → CO2(g) + H2O(l) What is the C8H18 : O2 ratio when the equation is balanced using the smallest whole-number coefficients? A. 1 : 12 B. 1 :…
Zadanie 5
Naturally occurring bromine has Ar = 79.90 and contains only the isotopes 79Br and 81Br. What percentage of the atoms are 81Br? A. 10 % B. 45 % C. 55 % D. 90 %
Zadanie 6
Which electron configuration represents an atom of a d-block element in its ground state? A. 1s2 2s2 2p6 3s2 3p6 4s1 3d6 B. 1s2 2s2 2p6 3s2 3p6 4s2 C. 1s2 2s2 2p6 3s2 3p6 4s2 3d6 D.…
Zadanie 8
On going down group 1 from lithium to caesium, the first ionization energy of the elements decreases. Which property also decreases down the group? A. Electronegativity B. Atomic radius C. Reactivity with water D. Number of occupied energy levels
Zadanie 9
The periodic table currently ends at element 118. A new element with atomic number 120 is synthesized. In which group of the periodic table would it be placed? A. Group 1 B. Group 2 C. Group 3 D. Group 18
Zadanie 10
The formula for yttrium nitrate is Y(NO3)3. What is the formula for yttrium oxide? A. Y2O3 B. YO C. YO3 D. Y3O2
Zadanie 12
What are the electron domain geometry and the molecular geometry of the sulfite ion, SO32−, in that order? A. Tetrahedral and tetrahedral B. Trigonal planar and trigonal planar C. Trigonal planar and trigonal pyramidal D. Tetrahedral and trigonal…
Zadanie 13
Which substance is highly volatile in its pure state and gives a solution with high electrical conductivity in water? A. CH3Br B. KBr C. H2S D. HBr
Zadanie 14
Which of these changes are exothermic? I. N2(g) + 3 H2(g) → 2 NH3(g) II. I2(s) → I2(g) III. H2O(g) → H2O(l) A. I and II only B. I and III only C. II and III only D. I, II and III
Zadanie 15
Which calculation gives the standard enthalpy change of formation of nitrogen monoxide, in kJ, from the data below? A. (+66) + (−114) B. 0.5 × (+66) + 0.5 × (−114) C. (+66) − (−114) D. 0.5 × (+66) − 0.5 × (−114)
- Tabela do uzupełnienia
Zadanie 16
Which expression gives the enthalpy change, ΔH, of the forward reaction shown in the enthalpy profile? A. II − I B. I − II C. I − III D. III − II
- Materiał graficzny
Zadanie 17
How does a catalyst increase the rate of a reaction? A. It increases the average kinetic energy of the colliding particles. B. It lowers the activation energy so that a greater proportion of collisions are successful. C. It makes the reaction more exothermic.…
Zadanie 18
Which equilibrium shifts to the left when the pressure on the system is increased at constant temperature? A. CaCO3(s) ⇌ CaO(s) + CO2(g) B. H2(g) + I2(g) ⇌ 2 HI(g) C. N2(g) + 3 H2(g) ⇌ 2 NH3(g) D. 2 SO2(g) + O2(g) ⇌ 2 SO3(g)
Zadanie 19
Which species is the conjugate base of methanoic acid, HCOOH? A. HCOOH2+ B. HCOO− C. HCO3− D. CH3O−
Zadanie 21
In which compound does chromium have an oxidation state of +3? A. K2Cr2O7 B. Cr(NO3)2 C. Cr2(SO4)3 D. Cr3(PO4)2
Zadanie 22
Magnesium ribbon is added to aqueous ethanoic acid. Which combination gives the role of the acid and a product formed from it? A. Oxidizing agent, H2(g) B. Oxidizing agent, CO2(g) C. Reducing agent, H2(g) D. Reducing agent, CO2(g)
Zadanie 23
A voltaic cell consists of a zinc electrode in aqueous zinc sulfate and a copper electrode in aqueous copper(II) sulfate, joined by an external circuit and by a salt bridge containing aqueous potassium nitrate. What occurs during the operation of the cell? I.…
Zadanie 24
Ethane and chlorine are exposed to ultraviolet light. Which species will most readily react with an ethane molecule? A. Cl2 molecule B. Cl− ion C. Cl ⋅ atom D. H+ ion
Zadanie 25
Which pair of compounds are structural isomers of each other? A. CH3CH2CH2OH and CH3CH2OH B. CH3CH2CHO and CH3CH2CH2OH C. CH3CH2NH2 and CH3CH2OH D. CH3CH2COOH and CH3COOCH3
Zadanie 26
Which option classifies compound X as an amine and compound Y as an alcohol correctly? A. Primary amine and primary alcohol B. Secondary amine and primary alcohol C. Tertiary amine and primary alcohol D. Secondary amine and tertiary alcohol
- Materiał graficzny
Zadanie 27
Butan-1-ol is heated with an acidified oxidizing agent, and the first product formed is distilled off as soon as it forms. Which compound is collected? A. CH3CH2COCH3 B. CH3CH2CH2CH2OH C. CH3CH2CH2CHO D. CH3CH2CH2COOH
Zadanie 28
The concentration of ethanoic acid in a sample of vinegar is determined by titration against a solution of sodium hydroxide of known concentration. Which procedure is most likely to produce a systematic error in the calculated concentration of the acid? A.…
Zadanie 29
In a precipitation reaction, further portions of the excess reactant are added after the limiting reactant has been completely consumed. Which graph shows how the amount of precipitate formed depends on the amount of excess reactant added? A. Graph A B. Graph…
- Materiał graficzny
Zadanie 30
Which data are sufficient to determine the empirical formula of an oxide of a known metal M? A. The density and the colour of the oxide B. The enthalpy change of formation and the melting point of the oxide C. The mass of M used and the mass of oxide formed D.…