Ch. 7-Chemical Reactions Question Preview (ID: 44654)
Repeats 22/35.
TEACHERS: click here for quick copy question ID numbers.
Which of the following is an example of a physical change?
a) evaporation in a swamp cooler
b) electricity produced by a dry cell
c) digestion of a hamburger
d) rusting of a car body
Which of the following factors would not speed up a chemical reaction?
a) increasing the concentration of a reactant
b) adding a catalyst
c) raising the temperature
d) making the reactant particles larger
A characteristic of matter that sllows it to change to something new is a ____________________.
a) physical property
b) physical change
c) chemical property
d) chemical change
The maximum number of electrons in the second energy level of an atom is _______________.
a) two
b) four
c) eight
d) ten
A basic sample has pH range ______________________.
a) between 0 and 7
b) between 7 and 14
c) of exactly 7
d) of exactly 0
Which of the following changes is chemical rather than physical?
a) water is boiled
b) aluminum foil is crumpled
c) glass is shattered
d) wood is burned
The particles that make up an atom are ______________________.
a) electrons, protons, and nuclei
b) elements, protons, and electrons
c) protons, neutrons, and nuclei
d) protons, neutrons, and electrons
The surface tension in a cup of water is caused by _______________________.
a) attractive forces between the water and its container
b) attractive forces between the water molecules
c) adhesive forces between water molecules
d) adhesive forces between the water and its container
One of the chemical properties of bases is that they _______________________.
a) taste sour
b) feel slippery
c) crumble
d) corrode metal
According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?
a) there is no relationship
b) the mass of products is sometimes greater
c) the mass of the reactants is greater
d) the masses are always equal
Kinetic energy is the ________________ of motion.
a) temperature
b) energy
c) heat
d) state
Which of the following is an example of a chemical change?
a) painting a house
b) freezing water
c) bending steel
d) baking soda in water
A substance that speeds up chemical reactions in the human body is __________________.
a) an inhibitor
b) an enzyme
c) polar
d) a prohibitor
Acids and bases can be all of the following except _____________
a) living
b) useful
c) harmful
d) edible
The _________________ is a unit of force.
a) pascal
b) atmosphere
c) newton
d) kilopascal
Which of the following changes gives NO evidence that a chemical reaction has taken place?
a) a cube of solid forms a puddle of liquid
b) a certain liquid is added to a solid, and bubbles of gas form
c) two liquids are mixed, and a precipitate forms
d) heating a blue solid turns the solid white
Which of the following conditions would likely cause the activation energy to be high?
a) atoms are close together
b) the temperature is hot
c) atoms are not close together
d) a catalyst is present
Which of the following materials will burn the fastest in open air?
a) a log, two feet in diameter
b) two logs. each one foot in diamter
c) a pile of small splinters made from a two-foot diameter log
d) both logs and the splinters will burn at the same rate
Which chemical is balanced?
a) Na + O2 = Na2O
b) Na2 + 2=2Na2O
c) 2Na + 2O2=2Na2O
d) 4Na + O2=2Na2O
In the compound H2O, the electrons in the bonds are unequally shared between oxygen and hydrogen, forming __________________.
a) cations
b) ionic bonds
c) nonpolor molecules
d) polar bonds
Play Games with the Questions above at ReviewGameZone.com
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 44654 in the upper right hand corner or click here.
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 44654 in the upper right hand corner or click here.
TEACHERS / EDUCATORS
Log In | Sign Up / Register
Log In | Sign Up / Register