CHEM 150 Revised Exam 006 Test QUIZ with Questions and Answers 2023/2024 VERIFIED
The change that occurs when water boils at 100°C is an example of
... [Show More] what type of change?
a) chemical
b) physical
c) nuclear
d) both chemical and physical e) None of these correct answers b) physical
2. A piece of copper tarnishing is an example of what type of change?
a) chemical
b) physical
c) nuclear
d) both chemical and physical e) None of these correct answers a) chemical
3. Heated sugar turning brown is an example of what type of change?
a) chemical
b) physical
c) both chemical and physical d) nuclear and chemical
e) none of these correct answers a) chemical
4. The contents of a flask that contains carbon monoxide and carbon dioxide gases is a
a) mixture of elements
b) mixture of compounds
c) pure substance
d) mixture of a compound and an element e) none of these correct answers b) mixture of compounds
5. The content of a flask that contains water gas and oxygen gas is a
a) mixture of elements
b) mixture of compounds
c) pure substance
d) mixture of a compound and an element e) none of these correct answers d) mixture of a compound and an element
6. The water in a bottle that contains Arrowhead Mountain Spring Water is a:
a) compound
b) pure substance
c) mixture
d) element
e) both (a) and (b) correct answers c) mixture
7. Which of the following describes the contents of a flask containing the gas(es) emitted after water boils?
a) mixture of elements
b) mixture of compounds
c) pure substance
d) mixture of an element and a compound e) None of these correct answers c) pure substance
8. An aspirin tablet is classified as a a) pure substance
b) mixture
c) element
d) both (a) and (b) e) none of these correct answers
9. Which of the following substances is not a mixture?
a) sea water
b) gasoline
c) coffee
d) ethyl alcohol
e) All are mixtures correct answers d) ethyl alcohol
10. Which of the following are chemical properties of matter?
I) corrosiveness II) density
III) flammability IV) melting point
a) I and II
b) I and III
c) II and IV
d) III and IV
e) None of these correct answers b) I and III
LOOK AT ATOMIC THEORY QUESTIONS correct answers
A ball is held 10ft .above the ground and then released. At the instant the ball is 5 feet above the ground The ball will possess:
a) gravitational potential energy only
b) kinetic energy only
c) gravitational potential and kinetic energy
d) not enough information correct answers c) gravitational potential and kinetic energy
2. The attractive interaction between two oppositely charged particles increases when
a) charge increases and distance increases.
b) charge increases and distance decreases.
c) charge decreases and distance increases.
d) charge decreases and distance decreases.
e) None of these correct answers b) charge increases and distance decreases.
3. The repulsive interaction between two like charged particles increases when
a) charge increases and distance increases.
b) charge increases and distance decreases.
c) charge decreases and distance increases.
d) charge decreases and distance decreases.
e) None of these correct answers b) charge increases and distance decreases.
4. Which set of charges and separation distances leads to the largest force of attraction?
a) (+1, −1) d = 1 cm
b) (+1, −2) d = 1 cm
c) (+2, +2) d = 2 cm
d) (−2, +2) d = 3 cm
e) (a), (b), and (d) correct answers b) (+1, −2) d = 1 cm (because of the larger magnitude) [Show Less]