CHEMISTRY (UNIT 1(2)

Question 1

When scientists need heat in an experiment, they use a _________.

Answer 1

Bunsen Burner

Question 2

What is the purpose of a Bunsen burner in experiments?

Answer 2

To supply heat.

Question 3

What gas is commonly used in Bunsen burners?

Answer 3

Butane丁烷

Question 4

What are the parts of a Bunsen burner?

Answer 4

Barrel灯管, air regulator/collar调节环, air hole气孔, gas inlet煤气入口, and base灯座.

Question 5

What is the function of the air regulator or collar?

Answer 5

open or close the air hole, controlling the amount of air mixed with the gas.

Question 6

What is the first step when lighting a Bunsen burner?

Answer 6

Turn the air regulator or collar to fully close the air hole.

Question 7

What is the second step when lighting a Bunsen burner?

Answer 7

Light a match and place it to one side of the top of the barrel.

Question 8

What is the third step when lighting a Bunsen burner?

Answer 8

Turn on the gas tap.

Question 9

What is the fourth step when lighting a Bunsen burner?

Answer 9

Turn the collar to open the air hole.

Question 10

What products are formed when butane burns in a Bunsen burner?

Answer 10

Heat, carbon dioxide, and water.