1. Which noble gas is used in airport runway and approach lights?He Ne Ar Kr Xe 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

2. Which of the following statements about noble gases is incorrect?
Except for radon, they can be isolated by fractional distillation of air.
Radon can be collected from the radioactive disintegration of radium salts.
Helium is produced from some natural gas fields.
The only forces of attraction among noble gas atoms are dipole-dipole attractions.
The attractive forces of He are so small that it cannot be solidified at 1 atm. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

3. Which one of the following compounds (apparently) involves sp3d2 hybridization at the xenon atom?
XeO3
XeF2
XeF4
XeF6
XeO4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

4. Which of the following equations does not represent a correct reaction?1.
2Fe + 3F2 {image} 2FeF3
Cu + Cl2 {image} CuCl2
Fe + I2 {image} FeI2
2Fe3+ + 2I- {image} 2Fe2+ + I2
Cu + I2 {image} CuI2 2. 3. 4. 5. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

5. Write and balance the formula unit equation for the reaction of iron with fluorine. The sum of the coefficients in the balanced equation (include one's) is _____. 6 7 3 4 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

6. Write and balance the formula unit equation for the reaction of iron with iodine. The sum of the coefficients in the balanced equation (include one's) is _____. 6 7 3 4 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

7. The anhydride of perchloric acid is _____.
ClO2
Cl2O7
Cl2O3
ClO3
Cl2O5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

8. Which formula is incorrect?
SF4
SF6
SO2
SO3
SCl3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

9. Calculate the mass of KClO3 that would be required to produce 29
Calculate the mass of KClO3 that would be required to produce liters of oxygen measured at 127°C and 760. torr. 2KClO3 {image} 2KCl + 3O2
7.82 g
12.2 g
14.6 g
24.4 g
73.5 g 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

10. six seven three four five
Write and balance the formula unit equation for the reaction of sulfur with potassium. Represent sulfur as S rather than S8. The sum of the coefficients in the balanced equation (include one's) is _____.
six
seven
three
four
five 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

11. Which acid listed on the right cannot be obtained by adding water to the substance on the left?
SO3 sulfuric acid
TeO2 telluric acid
H2S2O7 sulfuric acid
SO2 sulfurous acid
SeO2 selenous acid 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

12. Write the molecular equation for the thermal decomposition of ammonium nitrate at 170° to 260°C to produce dinitrogen oxide and steam. What is the sum of the coefficients? 4 5 6 8 9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

13. Write the equation for the reaction of gaseous ammonia with oxygen in the presence of red-hot platinum. (This is the first step of the Ostwald process.) What is the sum of the coefficients? 17 18 19 20 21 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

14. Superphosphate of lime is produced by the reaction of phosphate rock with _____.
Na2CO3
HCl
H2SO4
CaCO3
Ca(HCO2)3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50