IS_Section Quiz_1.6_e

When we use a dropper, we should not hold it upside-down.

• True

• False

The non-luminous flame is yellow in colour.

• True

• False

If strike back occurs, we should turn off the gas tap immediately.

• True

• False

A green flame is observed when strike back occurs.

• True

• False

A non-luminous flame has a lower temperature than a luminous flame.

• True

• False

We usually use a spatula to transfer a small amount of liquid.

• True

• False

We can only heat a liquid but not a solid using a Bunsen burner.

• True

• False

The rubber tubing of a Bunsen burner should be tightly connected to the gas tap.

• True

• False

The photo shows the observation when two solutions are mixed. Which of the following best describes the observation?

• A. A clear solution is formed.

• B. There is no observable change.

• C. Some solids are formed.

• D. Bubbles are formed.

The collar of a Bunsen burner

• A. holds the chimney upright

• B. connects the Bunsen burner to the gas tap.

• C. directs gas to the flame.

• D. controls the size of the air hole.