Chapter 1: Introducing Science

What is the correct procedure for students to follow if a chemical is spilled in the laboratory?

• Ask to go to the toilet.

• Run out of the room quickly.

• Splash large amount of water onto the spill.

• Stand back and inform the teacher of the spill immediately.

When you finish working with chemicals, biological specimens, and other laboratory substances, always __________.

• treat your hands with skin lotion

• wash your hands with soap and water

• wipe your hands on a towel

• wipe your hands on your clothes

A bottle containing an unknown chemical shown in the figure is labelled with a hazard symbol. Which symbol does it represent?

• Flammable

• Toxic

• Corrosive

• Irritant

• A

• B

• C

• D

A conical flask can measure volume of liquids accurately.

• True

• False

A luminous flame is blue in colour.

• True

• False

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D