CHMA10 Chapter 1 Exam Questions

17 Pages
Unlock Document

University of Toronto Scarborough
Xiao- An Zhang

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which statement is incorrect? 1) _______ A) The key to the scientific method is valid assumptions. B) A hypothesis is a tentative explanation of a natural law. C) A pattern of thinking is known as a paradigm. D) Induction is to infer a set of naturals laws from a set of observations. E) Natural laws are concise statements about natural phenomena. 2) A model which explains and makes predictions about natural phenomena is referred to as a: 2) _______ A) generalization B) deduction C) natural law D) theory E) hypothesis 3) Which of the following is a physical property? 3) _______ A) ozone reacts with silver to give silver oxide B) platinum metal does not react with hydrochloric acid C) sulfur burns in oxygen to form sulfur trioxide D) the density of lead 4) The scientific method involves: 4) _______ I) observations II) generalizations III) experiments IV) deduction V) induction A) I, III, IV B) I, III, V C) I, II, III, V D) I, II, III E) I, II, III, IV 5) Choose the INCORRECT statement. 5) _______ A) A natural law is a generalization of natural phenomena. B) A hypothesis is a conclusion that must follow logically from observations of nature. C) An experiment is a test of conclusions about natural law. D) The scientific method is the combination of observations, experimentation, and the formulation of laws, hypothesis and theories. E) A theory is a model of nature that can be used to describe natural phenomena. 6) A physical property is: 6) _______ A) a substance comprised of a single type of atom B) a property the sample displays without changing composition C) always visible D) a property the sample displays that results in a change in composition E) the ability of a sample to undergo change 7) A chemical change always involves a change in: 7) _______ I) appearance II) state III) composition IV) temperature A) I and II B) II and IV C) I, II, IV D) III only E) all of the above 8) Which of the following is a chemical property of gold? 8) _______ A) is a good conductor of heat B) is a good conductor of electricity C) is malleable D) does not react with hydrochloric acid 9) Which of the following are properties of table sugar? 9) _______ I) white crystalline solid II) water soluble III) sweet taste IV) forms a homogenous solution with water V) causes a water solution to taste sweet A) I, II, III, IV B) I, II, III C) I, III, IV D) II, IV, V E) all of the above 10) Which of the following is a physical change? 10) ______ A) the reaction of zinc with hydrochloric acid B) the freezing of water to form ice C) the inability of gold to react with water D) the burning of paper E) the mixing of salt and water 11) Oxygen is: 11) ______ A) an element B) a mixture C) a compound D) a solution E) always combined with hydrogen 12) Sulfur dioxide gas is: 12) ______ A) a heterogeneous mixture B) a homogeneous mixture C) a solid at room temperature D) a compound E) an element 13) Sulfuric acid is: 13) ______ A) a heterogeneous mixture B) a compound C) an atom D) a homogeneous mixture E) an element 14) Electricity is: 14) ______ A) an element B) a compound C) a mixture D) an atom E) none of these 15) Choose the INCORRECT statement. 15) ______ A) An element is a substance made of one type of atom. B) Homogeneous mixtures are solutions. C) Elements and compounds are substances. D) Matter is made of tiny units called atoms. E) A compound contains regions which are unlike other regions of the compound. 16) Which of the following are forms of matter? 16) ______ I) Hydrogen gas II) sunlight III) ice IV) wind V) iron A) III and V B) I, III and V C) II and IV D) I and V E) all of the above 17) Which one of the following would be classified as a heterogeneous mixture? 17) ______ A) brass B) coke C) copper nitrate solution D) air E) salt water 18) Which of the following is a chemical change? 18) ______ A) hammering zinc into a thin film B) the freezing of water to form ice C) the inability of gold to react with water D) the boiling of water to form steam E) the reaction of chlorine gas and sodium to form salt 19) From ammonia gas, one can obtain two different gases, each of which is a pure substance. Using 19) ______ only this information, it can be said with certainty that: A) one of the products is an element B) neither of the products can be an element C) ammonia cannot be an element D) both products are elements E) gases do not produce solids 20) Which of the following is a compound? 20) ______ A) oxygen B) water C) salad dressing D) heat E) nitrogen 21) The content of a container filled with sand and water would best be described as: 21) ______ A) elements B) a heterogeneous mixture C) a homogeneous mixture D) a solution E) a compound 22) Water is: 22) ______ A) a mixture B) a molecule C) a compound D) an atom E) an element 23) Saltwater is: 23) ______ A) an element B) a molecule C) an atom D) a mixture E) only one compound 24) All of the following are SI base units except 24) ______ A) second. B) gram. C) kelvin. D) meter. 25) Which of the following does NOT represent a derived unit in the SI system of measurements? 25) ______ A) liter B) m/s C) kg D) m 2 E) g/cm3 26) The quantity of matter in an object is the object's ________ and is measured on a ________. 26) ______ A) weight, scale B) mass, scale C) mass, balance D) weight, balance E) Any of the above since the terms are interchangeable. 27) One inch is equal to: 27) ______ A) 1.09 m B) 100 cm C) 2.54 m D) 2.54 cm E) 1/(2.54) cm 28) The prefix "milli" and the prefix "micro" correspond, respectively, to the factors 28) ______ A) -3 -6 B) -3 -12 10 and 10 . 10 and 10 . C) 10-6 and 10 . D) 10-1and 10 .6 29) Which of the following is longest? 29) ______ A) 300 pm B) -10 C) -4 D) 3.0 nm 3.0 x 10 cm 3.0 x 10 m 30) If gasoline costs 98.5 cents per liter in Canada, what is the price in dollars per gallon? 30) ______ A) $1.04 B) $4.16 C) $3.73 D) $3.94 31) In Europe, the volume of soda is given in cL. How many mL are contained in a can of soda 31) ______ labeled "75 cL"? A) 75 B) 750 C) 7500 D) 7.5 32) The SI system is: 32) ______ I) an abbreviation for Syst me Internationale d' Unit s" II) a decimal system. III) built on seven fundamental quantities. IV) also referred to as the metric system. A) I, III, IV B) I and IV C) I, II, III D) II and IV E) all of the above 33) Which of the following is the proper set of conversion factors for changing lb/in to Pascals. 33) ______ (Hint: A pascal is a unit of force equal to 1 N/m ) A) (1 lb/4.45 N)(1 m /1550 in ) B) 2 2 (4.45 N/1 lb)(1 m /1550 in ) C) (4.45 N/1 lb)(1550 in /1 m ) D) (1 lb/4.45 N)(1550 in /1 m ) E) (1 lb/4.45 N) 34) Without doing a calculation explain which of the following represents a higher temperature. 34) ______ A) 0 °F B) 20 °F C) 0 K D) 0 °C E) 270 °K 35) One centimeter is equal to: 35) ______ A) 2.54 inches B) 1.09 yards C) .0109 yards D) .30 ft E) none of these 36) If the density of aviation fuel is 1.77 lb/L, how many liters must be added to a tank to give 16,136) ______ kg? A) 1.61 x 104 B) 1.30 x 10 C) 2.01 x 10 D) 9.11 x 103 37) All of the following are intensive properties of a substance except 37) ______ A) mass. B) color. C) melting point. D) solubility. 38) A substance occupying a volume of 15.6 cm having a mass of 39.0 g would most likely be: 38) ______ A) a liquid B) a solid C) a gas D) either solid or liquid E) cannot be determined 39) Which of the following occupies the most volume? 39) ______ A) 1.36 kilograms of mercury (density = 13.6 g/mL) B) 5.07 fluid ounces of water (32 fl oz = 1 qt) C) 4.50 pounds of gold (density = 19.3 g/mL) D) 200 milliliters of methanol E) cannot be determined from the given information 40) 1.00 oz of gold (density = 19.3 g/ml) can be hammered into a sheet which would cover a 40) ______ area. How thick would such a sheet be in centimeters? A) -5 1.58 × 10 cm B) 4.82 × 10-4cm C) 2.11 × 10-5cm D) 4.02 × 10-5cm E) 6.33 × 10 cm 41) Which of the following defines or expresses the concept of accuracy? 41) ______ A) average of the data B) closest value to the expected answer C) difference between the accepted answer and the average value of the data D) reproducibility of a measurement E) deviation of the average 42) The following measurements were made by a group of students using the same balance and a 42) ______ 25.00 gram weight. Trial Mass 1 23.96 2 24.01 3 23.98 4 23.97 The data would be considered I) accurate and precise II) accurate but not precise III) precise but not accurate IV) neither precise nor accurate V) evidence of a systematic error VI) evidence of large random errors A) I only B) II and VI C) III and V D) IV and VI E) IV, V, VI 43) A student measuring the density of a solution (d = 1.233 g/mol) reported the following results: 43) ______ Which of the following is the best description of the student's
More Less

Related notes for CHMA10H3

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.