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Pada permukaan laut, pada suhu berapa air murni mendidih?

1. A0 °C (32 °F)
2. B37 °C (98,6 °F)
3. C100 °C (212 °F)
4. D50 °C (122 °F)

Which state of matter has a fixed volume but takes the shape of its container?

1. APlasma
2. BSolid
3. CGas
4. DLiquid

Unsur mana yang bersimbol K?

1. AKripton
2. BKalium
3. CKalsium
4. DKarbon

What is the formula of the hydroxide ion?

1. AO²⁻
2. BOH⁺
3. COH⁻
4. DH₃O⁺

A radioactive isotope has a half-life of 5 days. A sample starts with 80 g. How much is left after 10 days?

1. A0 g
2. B40 g
3. C10 g
4. D20 g

Drops of water form on the outside of a glass of ice water. Where does this water come from?

1. AThe ice evaporates through the glass
2. BThe glass releases water when it gets cold
3. CWater vapour in the air condenses on the cold glass
4. DWater leaks through tiny holes in the glass

How does soap help remove grease from skin?

1. ASoap molecules are completely nonpolar, so they dissolve grease like a solvent
2. BSoap makes the grease more dense so it sinks
3. CSoap reacts with grease to form water and carbon dioxide
4. DEach soap molecule has a polar end that attracts water and a nonpolar end that attracts grease

For N₂ + 3H₂ → 2NH₃, 1 mol of N₂ is mixed with 2 mol of H₂. Which reactant is limiting?

1. AN₂, because there is less of it
2. BH₂, because 1 mol of N₂ would need 3 mol of H₂
3. CNH₃, because it is the product
4. DNeither, because both are used up exactly