2014年11月IB化学HL真题下载-Paper1
A. 0.00040
B. 0.0080
C. 0.20
D. 0.40
A. 0.017
B. 0.067
C. 0.10
D. 0.15
3. 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
4. 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 of a hydrogen atom?
5. Successive ionization energies for an element, Z, are shown in the table below.
What is the most likely formula for the ion of Z?
6. Which statements are correct for the oxides of period 3 going from Na to Cl?
- I. The oxides become increasingly acidic.
- II. The bonding of the oxides changes from ionic to covalent.
- III. All the oxides dissolve readily in water.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
7. The elements argon, potassium, and calcium are consecutive in the periodic table. Which gives the correct order of increasing first ionization energies?
A. Ar < Ca < K
B. K < Ar < Ca
C. Ca < K < Ar
D. K < Ca < Ar
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
9. Which species contains a dative covalent (coordinate) bond?
A. HCN
B. C2H2
C. CO2
D. CO
10. Which sequence has the molecules in order of increasing nitrogen-nitrogen bond length?
A. N2 < N2H4 < N2H2
B. N2 < N2H2 < N2H4
C. N2H4 < N2H2 < N2
D. N2H2 < N2H4 < N2
。。。。。余下2014年11月IB化学HL真题下载-Paper1 省略！
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