Ch.1.4

Question 1

What is the use of a boiling tube?

Answer 1

Holding a larger amount of liquids or solids.

Question 2

What is the use of a test tube?

Answer 2

Holding a smaller amount of liquids or solids.

Question 3

What is the use of a conical flask?

Answer 3

Holding solids or liquids (for mixing).

Question 4

What is the use of a beaker?

Answer 4

Holding liquids or solids.

Question 5

What is the use of a rubber stopper?

Answer 5

Plugging the opening of test tubes and flasks.

Question 6

What is the use of a reagent bottle?

Answer 6

Storing liquids.

Question 7

What is the use of a dropping bottle?

Answer 7

Storing liquids which will be used in drops.

Question 8

What is the use of a gas jar?

Answer 8

Storing or holding gases.

Question 9

What is the use of a measuring cylinder?

Answer 9

Measuring the volume of liquids.

Question 10

What is the use of a watch glass?

Answer 10

Holding a small amount of liquids or solids.

Question 11

What is the use of an evaporating dish?

Answer 11

Holding a liquid to be evaporated.

Question 12

What is the use of a Bunsen burner?

Answer 12

Heating substances.

Question 13

What is the use of wire gauze?

Answer 13

Supporting apparatus (eg beakers, flasks) during heating.

Question 14

What is the use of a tripod?

Answer 14

Supporting the wire gauze.

Question 15

What is the use of a heatproof-mat?

Answer 15

Protecting the bench during heating.

Question 16

What is the use of tongs?

Answer 16

Holding hot objects.

Question 17

What is the use of a test tube holder?

Answer 17

Holding a test tube when heating.

Question 18

What is the use of a spatula?

Answer 18

Transferring a small amount of powder.

Question 19

What is the use of a test tube rack?

Answer 19

Holding test tubes or boiling tubes safely.

Question 20

What is the use of a funnel?

Answer 20

Letting liquids flow down during filtration.

Question 21

What is the use of filter paper?

Answer 21

Separating solids from liquids during filtration.

Question 22

What is the use of a dropper?

Answer 22

Transferring a small amount of liquids.

Question 23

What is the use of a glass rod?

Answer 23

Stirring liquids.

Question 24

What is the use of a stand and clamp?

Answer 24

Fixing the position of apparatus.

Question 25

We use different __________________ to do ________________ in the laboratory.

Answer 25

Apparatus, experiments

Question 26

Sometimes we draw ______________________ of the apparatus to show the experimental set-up.

Answer 26

Vertical sectional diagrams.

Question 27

What is the use of putting a rubber stopper in an inverted position?

Answer 27

The gas will just push out the stopper when it bubbles up instead of exploding.

Question 28

Why do we need to hold a test tube in a tilted position while heating the chemicals in it?

Answer 28

If we hold it vertically, the fire will char the test tube holder.