Daily Practice - 13+ Common Entrance
Common Entrance english, maths and science.
- 1Chemistry: 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).
- 2Chemistry: Acids, Reactions and the Periodic Table
Name the salt produced when zinc reacts with sulfuric acid.
- 3Chemistry: The Periodic Table and Separating Mixtures
In a chromatography experiment, the solvent front travels 10 cm and a dye spot travels 4 cm. Calculate the Rf value of the dye.
- 4Chemistry: Reactions, Energy and Rates
State whether an exothermic reaction transfers energy to, or takes in energy from, the surroundings.
- 5Chemistry: Metals, the Reactivity Series and Environmental Chemistry
Name the two substances that must both be present for iron to rust.
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