Question

Question 1 (5 points)

The purpose of an indicator is to
Question 1 options:


A)
help acids and bases dissociate when placed in water.


B)
test and determine the pH values of unknown solutions.


C)
conduct electricity.


D)
make a solution more neutral.
Question 2 (5 points)

Which of the following would not be a reason to create a controlled-fusion reactor?
Question 2 options:


A)
To utilize resources already available


B)
To confine a fission reaction


C)
To eliminate radioactive waste materials


D)
To start and control a fusion reaction
Question 3 (5 points)

A chemical reaction in which two elements or radicals change places with two other elements or radicals is a _______ reaction.
Question 3 options:


A)
decomposition


B)
substitution


C)
double replacement


D)
combination
Question 4 (5 points)

Matter is anything that
Question 4 options:


A)
is important to human society.


B)
contains two elements combined chemically.


C)
has mass and takes up space.


D)
has only one physical state.
Question 5 (5 points)

Regarding the formula Al2O3 which of the following is accurate?
Question 5 options:


A)
The chemical symbol Al indicates that argon is present in the substance.


B)
The coefficient 3 indicates that there are a total of three atoms of oxygen present in the substance.


C)
The subscript 2 indicates that two atoms of aluminum are present in the substance.


D)
The subscript 2 indicates that two atoms of oxygen are present in the substance.
Question 6 (5 points)

A chemical reaction in which compounds break up into simpler constituents is a _______ reaction.
Question 6 options:


A)
double replacement


B)
decomposition


C)
combination


D)
substitution
Question 7 (5 points)

What's the percent composition of sulfur in H2SO4?
Question 7 options:


A)
98.1%


B)
32.7%


C)
2.1%


D)
65.2%
Question 8 (5 points)

All of the following elements produce magnetic fields except for
Question 8 options:


A)
nickel.


B)
cobalt.


C)
copper.


D)
iron.
Question 9 (5 points)

Which of the following would increase the rate of a chemical reaction between hydrochloric acid (HCl) and solid zinc metal (Zn)?
Question 9 options:


A)
Performing the reaction at a lower temperature


B)
Decreasing the amount of Zn


C)
Pulverizing the zinc metal into a fine powder


D)
Decreasing the concentration of HCl
Question 10 (5 points)

A salt is obtained as a reaction between
Question 10 options:


A)
a base and an acid.


B)
an acid and oxygen.


C)
a nonmetal and a metal.


D)
a base and water.

Answer 1

1. B
2. B
3. C
4. C
5. C
6. B
7. B
8. C
9. C
10. A