Daily Practice - 13+ Common Entrance
Common Entrance english, maths and science.
- 1Biology: Respiration, Digestion and Gas Exchange
State one way the alveoli are adapted for efficient gas exchange.
- 2Chemistry: Materials
A block of wood has a mass of 60 g and a volume of 80 cm^3. Calculate its density.
- 3Chemistry: Acids, Reactions and the Periodic Table
Describe the test for carbon dioxide gas, and state the positive result.
- 4Chemistry: The Periodic Table and Separating Mixtures
Explain why a pencil, not a pen, must be used to draw the baseline on chromatography paper.
- 5Chemistry: Reactions, Energy and Rates
A student dissolves ammonium nitrate in water and the temperature of the solution falls. State whether this process is exothermic or endothermic.
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