Daily Practice · 13+ Common Entrance

Daily Practice - 13+ Common Entrance

2nd February 1993

5 questions · Years 7-8 · 744 questions in this band

1
Chemistry: Materials
The density of olive oil is 0.92 g/cm^3. State, with a reason, whether olive oil would float or sink in water (density 1.0 g/cm^3).
2
Chemistry: Acids, Reactions and the Periodic Table
Name the acid that produces nitrate salts.
3
Chemistry: The Periodic Table and Separating Mixtures
State whether reactivity increases or decreases going down Group 1, the alkali metals.
4
Chemistry: Reactions, Energy and Rates
Explain, using collision theory, why crushing a solid into a powder increases the rate of reaction.
5
Chemistry: Metals, the Reactivity Series and Environmental Chemistry
Name the gas released when fossil fuels are burned that is the main cause of the enhanced greenhouse effect.

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