1.1 Chemistry in context Read Online
1.2 Phases and classification of matter Read Online
1.3 Physical and chemical properties Read Online
1.5 Measurement uncertainty, accuracy, and precision Read Online
1.6 Mathematical treatment of measurement results Read Online
Your alarm goes off and, after hitting “snooze” once or twice, you pry yourself out of bed. You make a cup of coffee to help you get going, and then you shower, get dressed, eat breakfast, and check your phone for messages. On your way to school, you stop to fill your car’s gas tank, almost making you late for the first day of chemistry class. As you find a seat in the classroom, you read the question projected on the screen: “Welcome to class! Why should we study chemistry?”
Do you have an answer? You may be studying chemistry because it fulfills an academic requirement, but if you consider your daily activities, you might find chemistry interesting for other reasons. Most everything you do and encounter during your day involves chemistry. Making coffee, cooking eggs, and toasting bread involve chemistry. The products you use—like soap and shampoo, the fabrics you wear, the electronics that keep you connected to your world, the gasoline that propels your car—all of these and more involve chemical substances and processes. Whether you are aware or not, chemistry is part of your everyday world. In this course, you will learn many of the essential principles underlying the chemistry of modern-day life.
Download MCQ Quiz PDF eBook
Question: Which one of the following would be a comfortable room temperature?
Choices:
32*F
237K
38*C
25*C
none of the above
Question: What would be the best unit to record the volume of a liquid required for a cookie recipe?
Choices:
liter
gram
milliliter
kilogram
gallon
Question: Which of the following is an isotope of 60Co?
Choices:
32^P
Co^3+
58^Co
chalcogens
halogens
Question: Which of the following can be easily separated into individual components using physical processes such as filtering or decanting?
Choices:
pure substances
heterogeneous mixture
homogeneous mixture
compounds
elements
Question: Which of the following is an illustration of the law of definite proportions?
Choices:
water is a compound
water can be separated into other substances by chemical processes
the boiling point of water is constant
water is 11% hydrogen and 89% oxygen by mass
water occurs naturally on the earth in all three states
Question: Which of the following can be separated into other substances by physical means?
Choices:
copper wire
water
salt water
an atom
none of these
Question: Of the following, only _______ is a chemical reaction.
Choices:
crushing aspirin
Kool-Aid dissolving in water
sugar melting
silver tarnishing
ice melting in water
Question: Which of the following numbers has the most significant zeros?
Choices:
0.00000020510
6.023 x 10^23
0.08201
4.08400 x 10^-7
0.01020
Question: Which one of the following is an extensive property?
Choices:
density of lead
boiling point of ethanol
density of water
mass of sodium chloride
melting point of iodine
Question: Round the number 1027.538 to four significant figures and express the result in standard scientific notation.
Choices:
1.028 x 10^3
1.028 x 10^-3
1028
0.1028 x 10^3
10.28 x 10^-2
Question: Which of the following is the same as 0.001cm?
Choices:
0.01 mm
100 m
0.1 dm
0.01 km
0.00001 dm
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
