Acids and Alkalis

Question 1

How many colours are on the PH scale?

Answer 1

14

Question 2

What colour does litmus paper turn if the liquid is acidic?

Answer 2

Red

Question 3

What colour does litmus paper turn if the liquid is an alkalis?

Answer 3

Blue

Question 4

What is universal indicator?

Answer 4

A mixture of dyes that changes colour gradually over a range of pH and is used in testing for acids and alkalis.

Question 5

What colours does the liquid go if it is acidic in universal indicator?

Answer 5

Red, orange, yellow or light green. 1 - 6

Question 6

What colours does the liquid go if it is an alkalis in universal indicator?

Answer 6

Blue, dark green or purple. 8 - 14

Question 7

How do you make salt?

Answer 7

Acid + Alkalis = A salt and Water.

Question 8

What is the opposite of an acid?

Answer 8

A base.

Question 9

What is an alkalis?

Answer 9

A base dissolved in water.

Question 10

What does 7 mean on the PH scale?

Answer 10

It means that the liquid is neutral.

Question 11

What is a neutral liquid?

Answer 11

A liquid that is neither acid or alkalis like pure water.