Experimental Chemistry 1.1/1.2: Measurements Collection of Gases

Which method of gas collection would be most suitable for a gas that is less dense than air?

• Downward delivery

• Upward delivery

• Collection over water

What is the purpose of using anhydrous calcium chloride in gas collection?

The downward delivery method is suitable for collecting gases that are denser than air.

True/ False

• True

• False

Which of the following is a disadvantage of using concentrated sulphuric acid as a drying agent for gases?

• It's not effective at removing moisture

• It's too expensive

• It can react with some gases

• It evaporates too quickly

What is the SI unit for temperature?

• Celsius

• Fahrenheit

• Kelvin

Which apparatus is used to measure a range of volumes to the nearest 0.05 cm³?

• Pipette

• Volumetric flask

• Measuring cylinder

• Burette

Which apparatus is used to measure accurate fixed volumes of liquids, such as 10.0 cm³ or 25.0 cm³?

• Measuring cylinder

• Burette

• Pipette

• Volumetric flask

Which of the following is the SI unit for mass?

• Gram (g)

• Kilogram (kg)

• Tonne (t)

• Milligram (mg)

What is the accuracy of a typical digital stopwatch used in the chemistry laboratory?

• ±0.1 s

• ±0.01 s

• ±0.001 s

• ±1 s

How many cubic centimetres (cm³) are there in 1 cubic metre (m³)?

• 100

• 1,000

• 10,000

• 1,000,000