CHEMISTRY DEPARTMENT

WAID ACADEMY

Unit 1

Acids and Alkalis

Acid solutions have a pH value of

1. Between 5 and 9.

2. Equal to 7.

3. Less than 7.

4. More than 7

Bet

wee

n 5 a

nd 9.

Equal

to 7

.

Les

s th

an 7

.

More

than

7

0% 0%0%0%

12

Pure water has a pH value of

3 6 7 9

0% 0%0%0%

1. 3

2. 6

3. 7

4. 9

12

Which of the following pH values shows the most alkaline solution?

1 6 9 14

0% 0%0%0%

1. 1

2. 6

3. 9

4. 14

12

The pH scale goes from

Bel

ow 0

to a

bove

14

0 to

10

1 to

13

5 to

12

0% 0%0%0%

1. Below 0 to above 14

2. 0 to 10

3. 1 to 13

4. 5 to 12

12

In which line are all three substances acidic?

vin

egar

, bak

ing s

oda...

lim

e wat

er, C

oke a

nd...

ble

ach, b

akin

g so

da a.

.

vin

egar

, Cok

e an

d l...

0% 0%0%0%

1. vinegar, baking soda and oven cleaner

2. lime water, Coke and lemonade

3. bleach, baking soda and limewater

4. vinegar, Coke and lemonade

16

In which line are all three substances alkaline?

1. vinegar, baking soda and sodium hydroxide

2. sodium hydroxide baking soda and limewater

3. lime water, Coke and lemonade

4. lime water, Coke and ammonia solution

vin

egar

, bak

ing s

oda...

sodiu

m h

ydro

xide

ba...

lim

e wat

er, C

oke a

nd...

lim

e wat

er, C

oke a

n...

0% 0%0%0%

16

Which is a true statement about what happens when water is added to an acid solution?

The

pH rise

s an

d the.

..

The

pH dec

reas

es a

n...

The

pH rise

s an

d the

...

The

pH dec

reas

es a

n...

0% 0%0%0%

1. The pH rises and the acidity decreases.

2. The pH decreases and the acidity decreases.

3. The pH rises and the acidity increases

4. The pH decreases and the acidity increases

20

The salt formed when nitric acid is neutralised using potassium hydroxide is

16

Pota

ssiu

m c

hlorid

e

Pota

ssiu

m n

itrat

e

Sodiu

m n

itrat

e

Pota

ssiu

m s

ulpha

te

0% 0%0%0%

1. Potassium chloride

2. Potassium nitrate

3. Sodium nitrate

4. Potassium sulphate

Which line shows the products of the reaction between an acid and a metal carbonate?

1. A salt and water

2. Water and carbon dioxide

3. A salt and hydrogen.

4. A salt, water and carbon dioxide

20

A s

alt a

nd wat

er

Wat

er a

nd car

bon di..

.

A s

alt a

nd hyd

roge

n.

A s

alt,

water

and

car..

.

0% 0%0%0%

Which line shows the two gases mostly responsible for causing acid rain?

20

Car

bon dio

xide

and ..

.

Sulp

hur dio

xide

and ..

.

Sulp

hur dio

xide

and n

...

Nitr

ogen d

ioxi

de an

d...

0% 0%0%0%

1. Carbon dioxide and oxygen

2. Sulphur dioxide and carbon dioxide

3. Sulphur dioxide and nitrogen dioxide

4. Nitrogen dioxide and carbon dioxide