AnswersIL-Physical Science A-CRAcids and Bases in Solution

Acids and Bases in Solution — Cumulative exam Answers

2 verified answers
1
Free Preview

Sudhi is studying the motion of a toy car. She places the car in the middle of a ramp and releases it.Which best describes the reference point in this scenario?

A
the top of the ramp
B
the bottom of the ramp
C
the ending position of the car
D
the starting position of the car
2
Free Preview

Alai is comparing the physical property of two materials. He is hitting each with a hammer to observe what happens. What physical property of the materials is Alai most likely observing?

A
solubility
B
conductivity
C
hardness
D
odor
3

Which is a mixture?

A
sodium metal
B
chlorine gas
C
sodium metal and chlorine gas
D
sodium chloride (salt) and water
4

Which is an example of a chemical change?

A
frying an egg
B
boiling water
C
melting butter
D
chopping onions
5

When ammonium chloride and water interact, less energy is released from breaking the bonds in the water and ammonium chloride than what is required to form the bonds of the new substance.

A
An endothermic reaction is occurring.
B
An exothermic reaction is occurring.
C
Energy is being released into the surroundings.
D
Energy escapes as light into the surroundings.
6

What is produced when calcium reacts with fluorine in a synthesis reaction?Ca + F2 ________

Question illustration
A
CaF
B
CaF4
C
2CaF
D
CaF2
7

Which element would most likely have chemical properties similar to that of fluorine (F)?

A
Ne
B
N
C
Li
D
Br
8

Which is an example of negative acceleration?

A
a snowboarder who increases speed when traveling downhill
B
a biker who maintains a constant speed through a race
C
a skateboarder who reduces speed when moving up a hill
D
a runner who fluctuates speed by increasing and decreasing speed
9

How does Bohr’s model of the atom compare with Thomson’s model?

A
They both describe atoms as small, indivisible spheres.
B
They both describe electrons as moving around the nucleus.
C
They both describe electrons as being surrounded by the positive matter.
D
They both describe atoms as being made up of positive and negative matter.
10

Zac releases the air from a balloon. Which statement best describes what will happen to the air that was inside the balloon?

A
It will become more compacted.
B
It will remain the shape of the balloon but not the size.
C
It will remain the size of the balloon but not the shape.
D
It will expand to fill the room.
11

The diagram shows a toy car on a number line.

Question illustration
A
–4
B
1
C
2
D
4
12

What is a main difference between a mixture and a pure substance?

A
A mixture is only a liquid, but a pure substance can be in any state.
B
A mixture looks the same throughout, but a pure substance does not.
C
A mixture can vary in composition, but a pure substance has a set composition.
D
A mixture can be made up of a single compound, but a pure substance cannot.
13

Which type of reaction is C12H22O11 → 12C + 11H2O?

A
synthesis
B
decomposition
C
oxidation
D
combustion
14

Which most likely indicates a chemical change has occurred?

A
a solid substance becoming larger
B
a solid melting and becoming a liquid
C
a green liquid becoming a red liquid
D
a liquid freezing and becoming a solid
15

At the center, 6 unmarked red balls are interspersed with 4 blue balls marked with plus signs. A green cloud with 2 concentric white lines surrounds the center, with 2 small green balls marked with minus signs on the inner white line and 2 small green balls marked with minus signs on the outer white line.

Question illustration
A
4
B
6
C
10
D
14
16

Lava is rock that has undergone a physical change and has liquefied. What is known about this change?

A
The lava gained mass.
B
The lava was burned into smoke.
C
The lava can cool back into rock.
D
The lava lost mass.
17

This chart shows descriptions of the atoms for four different substances.

Question illustration
A
Object 1
B
Object 2
C
Object 3
D
Object 4
18

What is the element Ar classified as in the periodic table?

A
a noble gas
B
a halogen
C
a metalloid
D
a metal
19

An object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. Which describes the acceleration?

A
negative acceleration of 4 m/s2
B
positive acceleration of 4 m/s2
C
positive acceleration of 9 m/s2
D
negative acceleration of 9 m/s2
20

When a hammer strikes a compound formed by covalent bonds, what will most likely happen to the compound?

A
It will break into many pieces.
B
It will reform into a new shape.
C
It will spread out and then return to its original shape.
D
It will stay solid and resist the force of the hammer.

Did you find these answers helpful?

More from this Course

Assignment
22 verified answers

Lab: Motion

Assignment
20 verified answers

Lab: Acids and Bases

Instruction
14 verified answers

Instruction