2014年11月IB化学SL真题下载-Paper1
1. 0.040 mol of (NH4)2Ni (SO4)2•6H2O is dissolved in water to give 200 cm3 of aqueous solution.What is the concentration, in mol dm–3, of ammonium ions?
A. 0.00040
B. 0.0080
C. 0.20
D. 0.40
2. When sodium bromate(V), NaBrO3, is heated, it reacts according to the equation below.
2NaBrO3 (s) → 2NaBr (s) + 3O2 (g)
What amount, in mol, of NaBrO3 produces 2.4 dm3 of oxygen gas, measured at room temperature and pressure? (Molar volume of gas = 24 dm3 mol–1 at room temperature and pressure.)
A. 0.017
B. 0.067
C. 0.10
D. 0.15
3. Aluminium carbide reacts with water according to the equation below. What is the sum of all the coefficients when the equation is balanced?
___ Al4C3 (s) + ___ H2O (l) → ___ Al (OH)3 (s) + ___ CH4 (g)
A. 13
B. 14
C. 19
D. 20
4. At which temperature, in K, assuming constant pressure, is the volume of a fixed mass of gas at 127 °C doubled?
A. 200 K
B. 254 K
C. 400 K
D. 800 K
5. Which ion will show the least deflection in a mass spectrometer?
A. 35Cl+
B. 35Cl2+
C. 35Cl 35Cl+
D. 35Cl 37Cl+
6. Some possible electron transitions in a hydrogen atom are shown below. Which letter represents the electron transition with the highest energy in the emission spectrum?
7. Which properties decrease down both group 1 and group 7?
- I. Melting point
- II. First ionization energy
- III. Electronegativity
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
8. Which period 3 oxide, when added to water, forms an acidic solution?
A. SO3
B. MgO
C. Na2O
D. Al2O3
9. Which species contains a dative covalent (coordinate) bond?
A. HCN
B. C2H2
C. CO2
D. CO
10. Which diatomic molecule has the strongest bonding between its atoms?
A. H2
B. N2
C. O2
D. F2
2014年11月IB化学SL真题余下省略！
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