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1.The student holds a book at rest in an outstretched hand. The force exerted on the book by the student is equal to the book’s
2.The glass rod is charged positively by rubbing the glass rod with a silk cloth. During this process
a. electrons are transferred from the glass rod to the silk cloth.
b. electrons are transferred from the silk cloth to the glass rod.
c. protons are transferred from the glass rod to the silk cloth.
d. protons are transferred from the silk cloth to the glass rod.
3. When metal is heated in a flame, the flame ha distinctive color. This information was eventually extended to the study of stars because
a. the color spectra of stars indicate which elements are present.
b. the red shift in stars color indicates stars are moving away.
c. star color indicates absolute distance.
d. it allows the observer to determine the size of the stars.
4.Why is cobalt (Co) placed before Nickel (Ni) on the periodic table of the elements even though it has a higher average atomic mass than nickel?
a. Nickel has one more proton
b. Cobalt was discovered first
c. Nickel has fewer electrons
d. Cobalt has a lower density
5.Generally, how do atomic masses vary throughout the periodic table of elements?
a. They increase from left to right and top to bottom.
b. They increase from left to right and bottom to top.
c. They increase from right to left and top to bottom.
d. They increase from right to left and bottom to top.
6.Under the same conditions of pressure and temperature, a liquid differs from a gas because the molecules of the liquid
a. have no regular arrangement.
b. are in constant motion.
c. have stronger forces of attraction between them.
d. take the shape of the container they are in.
7.The temperature which all molecular motion stops is
b. -273 K
c. 0 K
8.How much work is required to lift a 4.0 kg concrete block to a height of 2.0 m?
a. 78 N
b. 78 kg
c. 50.5 N
d. 50.5 kg
9.When the moon appears through the night as a thin crescent, the sun’s light:
a. is being blocked by the earth
b. still illuminates about half the surface of the moon
c. is only hitting the crescent region
d. only shines during the day
10.Only about 50% of the solar energy directed toward Earth penetrates directly to the surface. What happens to the rest of the radiation?
a.It is absorbed or reflected by the atmosphere.
b. It loses energy traveling through space.
c. It is reflected off the Moon and back into space.
d. It loses energy overcoming the Sun’s gravity.
11.Which of these could increase average global temperatures?
a. increased use of fossil fuels
b. increased ocean algal blooms
c. decreased carbon dioxide emissions
d. increased numbers of animal species
12.At 25ºC, the pressure of helium is 650 torr. If its container is sealed under pressure of 597 torr, what will be its temperature in Kelvin?
a. 273.7 K
b. 324.4 K
c. 22.96 K
d. 325.6 K
13.Which of the following elements have the core configuration of [Ne] 3s2 3d1?
14.Scientist X had arranged the elements in increasing atomic number instead of atomic mass after investigating X-rays of elements. Scientist X is
a. Glenn Seaborg
b. Henry Moseley
c. Dmitri Mendeleyev
d. John Newlands
15. Soft drinks consists of a mixture of water, sugar, and flavouring, with carbon dioxide gas bubbled though it. Which of these ingredients would be considered the solvent?
d. carbon dioxide
16. Which procedure is unsafe when heating a liquid in a test tube?
a. heating slowly
b. adding the liquid to the test tube before turning on the flame
c. using a low energy flame
d. looking down the test tube to check for boiling
17. Peter stirs a mug of hot coffee with a metal spoon. What type of heat transfer is responsible for the spoon of getting hot?
18. An aluminium bar was found to have a mass 37 g. Using water displacement, the volume was measured to be 10 mL. What is the density of the aluminium?
a. 370 g/mL
b. 370 g
c. 3.7 g/mL
d. 3.7 g
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