Stage 4 Chemical world / working scientifically

What is the advantage of the safety flame?

• It flickers.

• It is sooty.

• It is yellow.

• It is not very hot.

The resource describes two accidents that caused injuries to Bunsen and Davy. Which safety equipment would have prevented their injuries?

• long sleev shirt

• bunsen burner

• test tube holder

• safety glasses

Many chemists in the 1800s had serious accidents. The most likely reason is

• they had a lot of bad luck

• they used faulty equipment

• they were not very good scientists

• they did completely new experiments

Which chemical named in the resource could have the formula NCl₃?

• coal gas

• chlorine

• carbon dioxide

• nitrogen trichloride

Which problem-solving strategy did Faraday use to make liquid chlorine?

• working with other scientists

• researching background information

• experimenting and learning from mistakes

• performing the same investigation as another scientist

What is the main difference between chlorine and carbon dioxide?

• Chlorine is a gas but carbon dioxide is a liquid.

• Chlorine is a metal but carbon dioxide is a non-metal.

• Chlorine is a compound but carbon dioxide is a mixture.

• Chlorine is an element but carbon dioxide is a compound.