IS Chapter 9

Question 1

Blue litmus paper is used for testing what solutions?

Answer 1

Acidic solutions

Question 2

Red litmus paper is used for testing what solutions?

Answer 2

Alkaline solutions

Question 3

Is ammonia solution and alkaline or acidic solution?

Answer 3

It is an alkaline solution

Question 4

What is the universal indicator used for?

Answer 4

To test the pH value of the substance mixed with it

Question 5

Is the pH value of the solution is 7, what is it?

Answer 5

A neutral substance

Question 6

What is the pH meter for?

Answer 6

To accurately display the pH value of the solution

Question 7

Besides, the pH meter we can use what. to connect with a data-logger?

Answer 7

A pH sensor
(The readings from the data-logger can be recorded and analysed in a computer)

Question 8

Plants such as red cabbages contain what. which show different colour in acidic and alkaline solutions?

Answer 8

Pigments

Question 9

What litmus paper is used for diluted sodium hydroxide solution?

Answer 9

Red Litmus paper

Question 10

What are the substance which take part in a chemical reaction are called?

Answer 10

Reactant(s)

Question 10

What is neutralization?

Answer 10

A chemical reaction of acids and alkalis mixed together

Question 11

What are the substance formed, as a result of a chemical reaction called?

Answer 11

Product(s)

Question 12

What will be formed when acid & alkali are mixed together?

Answer 12

Salt & Water

Question 13

What is conserved in neutralization?

Answer 13

Mass

Question 14

Sulphuric acid + Sodium hydroxide = ?

Answer 14

Sodium sulphate + water

Question 15

Hydrochloric acid + Potassium hydroxide = ?

Answer 15

Potassium chloride + water

Question 16

Nitric acid + Calcium dioxide

Answer 16

Calcium nitrate + water