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ACIDS BASES & SALTS

Total questions: 20

Worksheet time: 39mins

Name
Class
Date
1.
An extremely strong acid would have a pH of...
a)
1
b)
7
c)
9
d)
14
2.
An extremely strong base would have a pH of...
a)
1
b)
7
c)
9
d)
14
3.
A neutral substance would have pH of...
a)
8
b)
7
c)
6
d)
14
4.
If a solution is neither acidic or basic it has a pH of _____________.
a)
1
b)
13
c)
6
d)
7
5.
Indicators change color in the presence of a(n) _______________.
a)
acid or base
b)
buffer
c)
water molecule
d)
ester
6.
A base has a ___________ taste.
a)
bland
b)
salty
c)
bitter
d)
sour
7.

Acid is?

a)

A substance that reacts to metals and carbonates, and has a Ph of below 7.

b)

Often used in drain cleaner.

c)

Something that can only be found in a lab

d)

A bitter tasting substance

8.

A base is

a)

A substance that feels slippery, has a higher Ph than 7, and is often used in drain cleaner.

b)

Has a Ph of below 7 and can react to metal and carbonates

c)

Is only found in a lab

d)

Something water can never be

9.

An indicator is?

a)

A lab manual or guide

b)

Something like litmus paper that can tell you if a substance is acidic or basic

c)

A PS4 game where you pretend to direct traffic

d)

Something only scientists in a lab can use

10.

Do acids and bases conduct electricity?

a)

Only acids conduct electricity

b)

Only bases conduct electricity

c)

Bases and acids conduct electricity

d)

Neither conduct electricity

11.

When you neutralize acid with a base you create

a)

a Salt and water

b)

You can not neutralize acid with a base

c)

You create carbon dioxide

d)

A moderate sized explosion

12.

Which of these taste sour?

a)

acids

b)

bases

c)

salts

13.

Which of these feel slippery?

a)

bases

b)

acids

c)

salts

14.

Which of these turn red litmus paper blue?

a)

acids

b)

bases

c)

salts

15.

The pH scale is used to determine the strength of

a)

acids and bases

b)

chemical bonds

c)

electrical charges

d)

particles in a solution

16.

Chemicals formed when an acid and a base combine.

a)

salts

b)

noble gases

c)

metalloids

d)

hydroxides

17.
what happens when a solution of  an acid is mixed with a solution of a base in a test tube?a
a)
temperature of the solution increases 
b)
temperature of the solution decreases
c)
temperature remains constant
d)
no reaction
18.
calcium phosphate is present in tooth enamel its nature is
a)
basic
b)
acidic 
c)
neutral
d)
amphoteric
19.
To protect tooth decay we are advised to brush our teeth regurlarly.The toothpaste is
a)
acidic
b)
neutral
c)
basic
d)
corrosive
20.

The colour of methyl orange indicator in acidic medium is -------

a)

yellow

b)

red

c)

green

d)

orange