Midterm Exam - Jan

Part I

Instructions:	Complete each of the following by placing the best fitting answer on the answer sheet provided.

1.	Which of the following gases contribute to acid rain?

A. Ozone

B. Sulphur dioxides

C. Nitrogen oxides

D. Sulphur and nitrogen oxides

2.	Which of the following have a pH which is lower than 7?

A. Acids

B. Bases

C. Salts

D. Rain

3.	Rock formations have varying effects on acid rain. Many areas in Newfoundland have large deposits of limestone. What effect does limestone have on acid rain?

A. It makes the rain more acidic

B. It makes the rain more basic

C. No effect

D. It neutralizes the acid rain

4.	Which of the following would be considered a chemical change?

A. Scraping rust off a car

B. Freezing water

C. Water changing into water vapor

D. Burning propaine

5.	Which of the following is the WHMIS symbol for materials causing immediate and serious toxic effect?

A.	B.

C.	D.

6.	Which of the following would be considered a solution?

A. Food coloring in water

B. Milk

C. Sand in water

D. Oil in water

7.	Which of the following is not a molecular element?

A. Lithium

B. Nitrogen

C. Oxygen

D. Sulphur

8.	The combination of two or more elements which cannot be separated by physical means refers to a ...........

A. Subatomic particle

B. Compound

C. Mechanical mixture

D. Solution

9.	Which of the following is true?

A. Metals form negative ions

B. Nonmetals form positive ions

C. Multivalent atoms form only single ions

D. Elements from group 1 in the periodic table form positive ions

10. Elements of group 17 of the periodic table are called the ...........

A. Halogens

B. Noble gases

C. Alkali metals

D. Alkaline earths

11.	Elements of group 1 of the periodic table are called .......

A. Halogens

B. Noble gases

C. Alkali metals

D. Alkaline earths

12.	Which of the following elements is in group 2 and period 4 of the periodic table.

A. Mg

B. Ca

C. Br

D. K

13.	This element forms an ion with a 3+ charge and is in period 3.

A. P

B. Mg

C. Al

D. Si

14.	This element is in period 4 and group 8. What is the charge on its ion?

A. Does not form an ion

B. 2+

C. 2+ or 3+

D. 3-

15.	Which of the following is true of the model of the atom?

A. Electrons are found only in the nucleus

B. The number of neutrons has to be equal to the number of protons

C. The number of protons equals the number of neutrons

D. The number of neutrons equals the number of electrons

16.	Atoms with the same number of protons but with different numbers of neutrons are.......

A. Called isotopes

B. Impossible

C. Rare but possible

D. Radioactive

17.	Which of the following arrangements describes the distribution of electrons in the electron energy levels?

A. 2, 8, 8, 8

B. 2, 8, 18

C. 2, 8, 8, 16

D. 2, 8, 8, 18

18.	Atoms or groups of atoms with a positive or negative charge are .........

A. Called ions

B. Covalently bonded together

C. Called isotopes

D. Polyatomic ions

19.	Which of the following is true of ions?

A. Metals lose electrons to become negatively charged

B Nonmetals gain electrons to become positively charged

C. Metals gain electrons to become negatively charged

D. Atoms gain or lose electrons to gain the stable structure of the nearest noble gas

20.	Molecular compounds .........

A. Are formed by the transfer of electrons

B. Are formed by covalent bonds

C. Involve bonding of metals and nonmetals

D. Involve attractions of oppositely charged ions

21.	Groups of atoms bonded together with an overall ionic charge are called .........

A. Ionic compounds

B. Polyatomic ions

C. Multivalent atoms

D. Molecular compounds

22.	Ionic compounds formed during neutralization reactions are called ..........

A. Polyatomic ions

B. Isotopes

C. Salts

D. Molecular

23.	A reaction in which matter changes to produce new substances with new properties is called ................

A. A chemical reaction

B. A nuclear change

C. A physical change

D. A metamorphosis

24. Which of the following describes a single replacement reaction?

A. Element + element compound

B. Compound element + element

C. Compound + compound compound + compound

D. Element + compound element + compound

25.	Which of the following describes a simple composition reaction?

A. Element + element compound

B. Compound element + element

C. Compound + compound compound + compound

D. Element + compound element + compound

26. In a coal mine coal dust suspended in the air presents an explosion hazard whereas chunks of coal on the mine floor pose no hazard at all. Which of the factors affecting reaction rate does this demonstrate?

A. Temperature

B. Concentration

C. Surface area

D. Pressure

27.	The process whereby organic molecules form chains to form larger organic molecules is called .........

A. Polymerization

B. Monomerization

C. Organic reactions

D. Chain reaction

28.	Which of the following describes an object experiencing uniform motion.

A. It is accelerating

B. It is traveling in a straight line at constant speed

C. It is traveling at constant speed

D. It is experiencing free fall

29.	Which best describes the following reaction?

A. Double replacement

B. Exothermic

C. Endothermic

D. Hydrocarbon combustion

30.	The distance traveled by an object in a given time describes the object's ..........

A. Instantaneous speed

B. Speed

C. Acceleration

D. Slope

31.	The slope of a velocity - time graph describes the object's ................

A. Acceleration

B. Deceleration

C. Distance

D. Instantaneous speed

32.	John was driving his car and looked at the speedometer which read 90 km/h. What does this mean?

A. It was his acceleration rate

B. It was his average speed

C. It was his instantaneous speed

D. It was his velocity

33.	Which one of the following statements are true?

A. Velocity is a measure of speed and direction

B. An object speeding up is decelerating

C. Speed and velocity are the same thing

D. The slope of a displacement time graph is acceleration

34.	The amount velocity changes per one second time interval is called ........

A. Speed

B. Change in velocity

C. Uniform motion

D. Acceleration

35.	What is the speed of a bicycle which travels 100m in 50s at a constant speed?

A. 5m/s

B. 2m/s

C. 2m/s2

D. 5000m

36.	Convert 230 km/h to m/s.

A. 64 m/s

B. 882 m/s

C. 6.4 m/s

D. 230 m/s

37.	If the formula for calculating speed is, , what is the formula for calculating t?

A.

B.

C.

D.

38.	Which of the following graphs shows an object decelerating?

A.	B.

C.	D.

39.	When the driver of a car steps on the brake pedal, the car .........

A. Accelerates

B. Decelerates

C. Loses speed

D. Both B and C

40.	Consider the following graph. What is the approximate speed of the object?

A. 65 m/s

B. 50 m/s

C. 100 m/s

D. 70 m/s2

Part II

Instructions: Complete all of the following questions. Show all workings where appropriate as marks may be given for partially correct answers.

Place workings and answer in the space provided.

1.	Complete any two of the following.

(A)	List five characteristics of an acid and five characteristics of a base.

(B)	Distinguish between physical and chemical properties and give an example of each.

(C)	List three properties of metals and three properties of nonmetals.

2.	Complete any two of the following questions.

(A)	(i)	How many neutrons are in the following atom?

(ii)	Draw the electron energy level diagram for the element, calcium.

(B)	(i)	Why do ions form?

(ii)	Draw the electron energy level diagram for the potassium ion and the oxide ion, indicating the charge on each.

(C)	Distinguish between polyatomic ions and multivalent atoms.

3.	(A)	Write the name of the formula for each of the following and indicate if it is molecular or ionic.

Compound	Name	Type
1.
2.	Tetra phosphorus dichloride
3.
4.
5.	Aqueous hydrogen phosphate

(B)	Balance each of the following equations and identify the type of reaction.

(i)

Type:

(ii

Type:

(ii

Type:

4.	(A)	Construct a velocity - time graph for the following data and answer the questions below. Be sure to label your graph properly.

Time (s)	Velocity (m/s)
0	0.0
1	9.8
2	19.6
3	2.94
4	39.2
5	49.0
6	58.8

(B)	Calculate the acceleration of the object by determining the slope.

5.	Complete any two of the following questions.

(A) car accelerates from rest to 100 km/h in 4.5 s. Determine the car's acceleration rate.

(B)	Ray drove for 3.5 h at 80 km/h and after hitting slippery road conditions, drove an additional 2.3 h at 65 km/h. What was his average speed?

(C)	The speed of sound in air is about 340 m/s. If you see a lightening flash and 4 s later you hear the thunder, how far away is the lightening storm?