The substances that are diminished in a chemical reaction are called the
a. products.
b. reactants.
c. chemicals.
d. precipitates.
[Ques. 2] A speedometer indicates ______________ if the automobile is traveling forward.
a. instantaneous acceleration
b. instantaneous speed
c. instantaneous velocity
d. average speed
e. average acceleration
[Ques. 3] The substances that are formed by a chemical reaction are called the
a. products.
b. reactants.
c. chemicals.
d. precipitates.
[Ques. 4] The magnitudes of two horizontal displacements are 4 m and 9 m, respectively. Given that the vectors may be in either the plus or the minus direction, they cannot be added together to give a total displacement of
a. 13 m.
b. 5 m.
c. 5 m.
d. 13 m.
e. 4 m.
[Ques. 5] A chemical reaction is at equilibrium when
a. no reactants are changing to products.
b. the forward and reverse reactions proceed at the same rate.
c. the total mass has become constant.
d. the temperature is no longer changing.
[Ques. 6] The straight-line distance and direction between two points are, together, called
a. velocity.
b. displacement.
c. distance.
d. acceleration.
[Ques. 7] Which of the following does not take place in a chemical reaction?
a. New substances are formed.
b. Neutrons are released.
c. Energy is released or absorbed.
d. Reactants disappear.
[Ques. 8] Distance covered per unit of time is called
a. speed.
b. acceleration.
c. velocity.
d. displacement.
[Ques. 9] Which of the following is a chemical change?
a. Dry ice subliming
b. Limestone being crushed to powder
c. Paper being shredded
d. Sulfur burning
[Ques. 10] Average speed multiplied by time gives
a. average acceleration.
b. displacement.
c. instantaneous speed.
d. distance.
Quick Reply
