Which of the following shows the correct structure of part of the polymer formed by thepolymerisation of CH3 – CH = CH – CH3 ? Answer: 18) E The double…

The diagram shows a simple piece of apparatus that can be used to demonstrate some of the events involved in human ventilation. Which events occurring during ventilation will be demonstrated…

The masses of atoms and molecules can be determined using a mass spectrometer. The masses can be shown as a series of peaks. Element X exists as a diatomic molecule.…

The diagram shows three different types of animal cell. 1 epithelial cell2 mature red blood cell3 muscle cellWhich of these cells is/are found as part of a tissue? Answer: 13)…

All four corners of a rectangle are on the circumference of a circle.The rectangle has a perimeter of 24 cm.The ratio of length : width for the rectangle is 3…

Quantities associated with a moving vehicle include its velocity, speed, momentum and kinetic energy. Which of these quantities will always change if the vehicle changes direction? Answer: 11) E Speed…

Iron is extracted from iron ore (which contains Fe2O3) using carbon monoxide. This overall reaction is slow and so must be heated. The chemical equation for this reaction under certain…

A sample of healthy human cells contains 4 cells. After they were allowed to divide 5 times using the same type of cell division, there were 128 cells in the…