Honour Chemistry Practice Test: Unit 1: Basic Chemistry
Part A: Multiple Choice (1 mark each)
1. Choose the response that includes all the items listed below that are pure substances.
i. orange juice ii. steam iii. wine iv. oxygen v. vegetable soup
A. i, iii, v B. ii, iv C. i, iii, iv D. iv only E. All of them are pure.
2. All of these statements describe properties of sodium. Which one describes a physical property of
sodium?
A. Sodium's surface turns black when first exposed to air.
B. Sodium is a solid at 25°C and changes to a liquid when heated to 98°C.
C. When placed in water, sodium sizzles and a gas is formed.
D. When placed in contact with chlorine, sodium forms a compound that melts at 801°C.
E. Sodium is never found as the pure metal in nature.
3. The diameter of an atom is approximately 1 × 10−8 cm. What is this diameter when expressed in
nanometers?
A. 1 × 10−19 nm B. 1 × 10−15 nm C. 1 × 101 nm D. 1 × 10−10 nm E. 1 × 10−1 nm
4. How many milliliters is 0.005 L?
A. 0.5 mL B. 5 mL C. 0.50 mL D. 0.000005 mL E. 200 mL
5. After carrying out the operations (99.9 + 0.573) ÷ 8.2, how many significant figures are appropriate to
show in the result?
A. 1 B. 2 C. 3 D. 4 E. 5
6. Suppose a house has a floor area of 2,250 square feet. What is this area in units of cm2 (1 ft = 30.48 cm)?
A. 2.42 cm2 B. 2.09 × 106 cm2 C. 5.02 × 104 cm2 D. 6.86 × 104 cm2 E. 101 cm2
7. Table salt (sodium chloride) is 39.1% sodium. How many grams of salt contains 72.0 g of sodium?
A. 28.2 g salt B. 72.0 g salt C. 184 g salt D. 2,820 g salt E. 1.84 × 105 g salt
8. Radio waves travel at the speed of light, which is 3.00 × 108 m/s. How many kilometers will radio
messages to outer space travel in exactly one year (365 days)?
A. 9.46 × 1015 km B. 7.30 × 108 km C. 7.10 × 1010 km D. 9.46 × 1012 km E. 3.33 × 10-3 km
9. The scientist who determined the magnitude of the electric charge of the electron was
A. John Dalton. B. Robert Millikan. C. J. J. Thomson. D. Henry Moseley. E. Ernest Rutherford.
10. An atom of the isotope sulfur-31 consists of how many protons, neutrons, and electrons?
(p = proton, n = neutron, e = electron)
A. 15 p, 16 n, 15 e B. 16 p, 15 n, 16 e C. 16 p, 31 n, 16 e D. 32 p, 31 n, 32 e E. 16 p, 16 n, 15 e
