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Acid, Base, Magnetism

Total questions: 40

Worksheet time: 42mins

Name
Class
Date
1.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

2.
Releases hydrogen in an aqueous solution.
a)
base
b)
strong base
c)
acid
d)
weak base
3.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
4.
The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?
a)
3
b)
9
c)
7
d)
5
5.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic
6.
If a substance has a pH of 10 it is considered
a)
Acidic
b)
Basic
c)
Neutral
7.
Acids produce _________ ions when they break down or dissocciate. 
a)
Hydroxide (OH-)
b)
Water
c)
Chlorine (Cl-)
d)
Hydrogen (H+)
8.
Bases release ____________ ions when they break down or dissociate. 
a)
Hydrogen (H+)
b)
Hydroxide (OH-)
c)
Chlorine (Cl-)
d)
no
9.
Water is neutral because the number of hydrogen and hydroxide ions is _________.
a)
the same
b)
different
10.
The pH scale ranges from ____________.
a)
0-7
b)
1-100
c)
1-20
d)
0-14
11.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
12.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
13.

A chemical reaction in which energy is absorbed is ______________.

a)

an endothermic reaction

b)

an exothermic reaction

c)

a single replacement reaction

d)

a double replacement reaction

14.

Which is are characteristics of acids?

a)

Turns litmus paper red

b)

Turns litmus paper blue

15.

Which is are characteristics of acids?

a)

Taste bitter

b)

Taste sour

16.

Which is are characteristics of bases?

a)

Turns litmus paper red

b)

Turns litmus paper blue

17.

Which is are characteristics of bases?

a)

Taste bitter

b)

Taste sour

18.

Base has a pH range of ______________.

a)

0-6.9

b)

7.1-14

c)

0-14

19.
What is the name of the reaction when an acid react with alkali?
a)
Displacement
b)
Neutralization
c)
Precipitation
20.
What is the definition of an acid?
a)
Acid which can ionises in water
b)
substance that ionises in water to produce hydrogen ion
c)
substance that ionises to produce hydroxide ion
21.
In an experiment, a red litmus paper in dip into a solution. It turns to blue. This indicates that the solution is..
a)
Acid
b)

Base (Alkali)

22.
Magnetism is generated by moving
a)
protons.
b)
electrons.
c)
neutrons.
d)
elements.
23.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
24.
As the distance between two magnets increases (they get farther apart), the force between them:
a)
Increases
b)
Decreases
c)
Stays the Same
25.
If you cut a magnet in half, what happens to the poles?
a)
One half gets the North Pole, the other half gets the South Pole
b)
Both halves get only a North Pole
c)
Both halves get only a South Pole
d)
Both halves get a North pole and a South Pole
26.
What is responsible for the Magnetic Field around Earth?
a)
The Earth's crust
b)
The Earth's molton iron core
c)
The Earth's mantel
d)
The Sun
27.
The strongest part of a magnet is...
a)
the bars.
b)
the force field.
c)
the poles. 
d)
the middle.
28.

If a glass plate is placed over a magnet and iron filings are sprinkled over the glass, a pattern will be visible. What does this pattern indicate?

a)

The magnetic field

b)

The electrostatic field

c)

The piezoelectric effect

d)

The chemical reaction of the magnet and the filings

29.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
30.
Earth acts like a giant magnet because its center is made up MOSTLY of
a)
granite
b)
limestone
c)
iron
d)
nickel
31.
Why does a compass needle point north?
a)
The compass is a bar magnet
b)
Because north is up
c)
Because it's magic
d)
It lines up with the Earth's magnetic field
32.
The magnet's shown will
a)
not move
b)
attract
c)
repel
d)
all of the above
33.

Four substances were tested for pH, lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Which of the following correctly lists the substances from most basic to acidic?

a)

lemon juice, milk, baking soda, bleach

b)

bleach, baking soda, milk, lemon juice

c)

milk, lemon juice, baking soda, bleach

d)

baking soda, bleach, lemon juice, milk

34.

Which of these is a property of acidic solutions?

a)

they taste sour

b)

they feel slippery

c)

they are in many cleaning products

d)

they taste bitter

35.

Acids are substances that release positively charges (a)   ions in water

36.

The (a)   scale measures the strength of acids and bases.

37.

Black coffee has a pH of 5. It is a ________ ____________

a)

Weak

b)

Strong

c)

Acid

d)

Base

38.

pH 3

a)

Weak

b)

Strong

c)

Acid

d)

Base

39.

pH 14

a)

Weak

b)

Strong

c)

Acid

d)

Base

40.

A sugar solution does not change the color of both blue and red litmus paper. This means the sugar solution is a ________.

a)

acid

b)

base

c)

neutral

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