2010年11月IB化学SL真题下载-Paper1
1. What is the total number of nitrogen atoms in two mol of NH4NO3?
A. 4
B. 6.02 ×1023
C. 1.20 ×1024
D. 2.41×1024
2. On analysis, a compound with molar mass 60 g mol–1 was found to contain 12 g of carbon, 2 g of hydrogen and 16 g of oxygen. What is the molecular formula of the compound?
A. CH2O
B. CH4O
C. C2H4O
D. C2H4O2
3. Equal masses of the metals Na, Mg, Ca and Ag are added to separate samples of excess HCl (aq).Which metal produces the greatest total volume of H2 (g)?
A. Na
B. Mg
C. Ca
D. Ag
4. The graph below represents the relationship between two variables in a fixed amount of gas.
Which variables could be represented by each axis?
5. 8.5 g of NH3 are dissolved in H2O to prepare a 500 cm3 solution. Which statements are correct?
- I. NH3 is the solute and H2O is the solution
- II. The concentration of the solution is 17 g dm–3
- III. [NH3] . moldm -3
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
6. Which statement about the species 63Cu2+ and 65Cu+ is correct?
A. Both species have the same number of protons.
B. Both species have the same number of electrons.
C. Both species have the same number of neutrons.
D. Both species have the same electron arrangement.
7. Which statement about the isotopes of an element is correct?
A. They have the same mass number.
B. They have a different atomic number.
C. They have the same chemical properties.
D. They are located in different places in the periodic table.
8. Which properties of the alkali metals decrease going down group 1?
A. First ionization energy and reactivity
B. Melting point and atomic radius
C. Reactivity and electronegativity
D. First ionization energy and melting point
9. Which statements about the periodic table are correct?
- I. The elements Mg, Ca and Sr have similar chemical properties.
- II. Elements in the same period have the same number of main energy levels.
- III. The oxides of Na, Mg and P are basic.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
10. The electronegativities of four different elements are given below (the letters are not their chemical symbols).
Based on this information which statement is correct?
A. W is a non-metal.
B. W and X form an ionic compound.
C. Y is a metal.
D. Y and Z form a covalent compound.
2010年11月IB化学SL真题余下省略！
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