AQA Chemistry Trilogy Paper 2 Basics (2 of 2)

What does 'pure substance' mean?

• No bacteria.
• You can drink it.
• It's natural.
• Contains one element or compound.

How do boiling point/melting points tell you if a substance is pure?

• Happens at a specific temperature, not a range.
• Happens at a range, not a specific temperature.

What is a mixture designed as an useful product?

• Solution
• Formulation
• Pure
• Compound

Choose the one that is NOT a formulation.

• Paint
• cosmetics
• sugar
• medicine

In chromatography, spots move higher up the paper if it is more attracted to what? (stationary paper or mobile solvent)

• Mobile
• Stationary

Chromatography: If the spot moves 4cm and the solvent 10cm, calculate the Rf value.

• 4
• 6
• 0.4
• 0.6

What is the test and result for hydrogen?

• Damp blue litmus paper. Goes white (bleached)
• Lit splint. Squeaky pop.
• Glowing splint. Relights.
• Bubbles through limewater goes cloudy.

What is the test and result for oxygen?

• Damp blue litmus paper. Goes white (bleached)
• Lit splint. Squeaky pop.
• Glowing splint. Relights.
• Bubbles through limewater goes cloudy.

What is the test and result for carbon dioxide?

• Damp blue litmus paper. Goes white (bleached)
• Lit splint. Squeaky pop.
• Glowing splint. Relights.
• Bubbles through limewater goes cloudy.

What is the test and result for chlorine?

• Damp blue litmus paper. Goes white (bleached)
• Lit splint. Squeaky pop.
• Glowing splint. Relights.
• Bubbles through limewater goes cloudy.