chemistry - bunsen burners

Question 1

Which potential hazard matches the description of “can burn a hole in wooden surfaces”.

Answer 1

Oxidising.

Question 2

Which potential hazard matches the description of “camping gas - store in fireproof cupboard”.

Answer 2

Corrosive.

Question 3

Which potential hazard matches the description of “causes an explosion in confined places”.

Answer 3

Explosives.

Question 4

Which potential hazard matches the description of “may intensify a fire”.

Answer 4

Gas under pressure.

Question 5

Which potential hazard matches the description of “makes your eyes sting/can cause a mild rash”.

Answer 5

Caution.

Question 6

Which potential hazard matches the description of “kills fish in rivers”.

Answer 6

Danger to environment, long term health hazard.

Question 7

Which potential hazard matches the description of “keep away from naked flame”.

Answer 7

Flammable.

Question 8

Which potential hazard matches the description of “do not swallow”.

Answer 8

Toxic.

Question 9

Which air hole setting, sound, colour and heat would occur in a roaring flame?

Answer 9

Air hole = fully opened.
Sound = roaring.
Colour = blue.
Heat = extremely hot, 700 degrees celsius.

Question 10

Which air hole setting, sound, colour and heat would occur in a safety flame?

Answer 10

Air hole = closed.
Sound = silent.
Colour = yellow.
Heat = coolest flame, 300 degrees celsius.

Question 11

Which air hole setting, sound, colour and heat would occur in a blue flame?

Answer 11

Air hole = half-opened.
Sound = silent.
Colour = blue.
Heat = very hot, 500 degrees celsius.

Question 12

What does a chimney do on a Bunsen Burner?

Answer 12

Raises the flame to a suitable height for burning or heating.

Question 13

What does an air hole do on a Bunsen Burner?

Answer 13

Allows the air to enter the burner.

Question 14

What does the base do on a Bunsen Burner?

Answer 14

Supports the burner so it will not topple. (weeeeeeeeeeeeeeee).

Question 15

What does a heatproof mat do on a Bunsen Burner?

Answer 15

Protects the surface it is on.

Question 16

What does a gas tap do on a Bunsen Burner?

Answer 16

Controls the flow of gas to the burner.

Question 17

What observations could we see after heating a porcelain lid with a safety flame?

Answer 17

Starting to burn on the edges.

Question 18

What observations could we see after heating a porcelain lid with a roaring flame?

Answer 18

Stayed the same even with the pressure of heat.

Question 19

Why would the flame be orange/yellow when an air hole is closed?

Answer 19

All of the oxygen is stored inside the collar, only allowing gas mixing with air at the top of the chimney.

Question 20

Why would the flame be blue when an air hole is open?

Answer 20

The air is drawn into the chimney, mixing with gas, allowing complete/incomplete combustion.

Question 21

True or false: a Bunsen Burner uses methane gas as a fuel.

Answer 21

True.

Question 22

True or false: the yellow flame is the hottest Bunsen Burner flame.

Answer 22

False.

Question 23

True or false: the yellow flame is produced when the air hole is closed.

Answer 23

True.

Question 24

True or false: the yellow flame is used for heating liquids.

Answer 24

False.

Question 25

Can a blue flame be easily seen?

Answer 25

No, even though it is a safety flame.

Question 26

Which scientific piece of equipment would you use to measure accurately the volume of a liquid?

Answer 26

Measuring cylinder (NOT beaker).

Question 27

Which scientific piece of equipment would you use to separate particles of a solid from a liquid?

Answer 27

Funnel.

Question 28

Why do we use yellow flame for safety?

Answer 28

It can be easily seen.

Question 29

Which part of the Bunsen burner controls the flame temperature?

Answer 29

Air hole.

Question 30

What is the function of the base of a Bunsen burner?

Answer 30

The base supports the Bunsen burner and keeps it stable so it doesn't tip over.

Question 31

What is the gas tap and what is its function?

Answer 31

The gas tap controls the flow of gas into the Bunsen burner. Turning it on or off starts or stops the gas supply.

Question 32

What does the collar do?

Answer 32

The collar can be turned to open or close the air hole and control the flame type.

Question 33

What is the function of the air hole?

Answer 33

The air hole controls how much air (oxygen) mixes with the gas. This changes the flame type.

Question 34

What is the function of the chimney?

Answer 34

To raise the flame to a suitable height for burning or heating.

Question 35

What is the role of the heatproof mat?

Answer 35

To protect the surface it is on.