Daily Practice · GCSE Science
April 1957 5-a-day
Every sheet in April 1957
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 1957Define a finite resource, giving one example.
- 2nd April 1957State one reason why simple covalent substances such as chlorine have low melting points.
- 3rd April 1957Give the formula for atom economy.
- 4th April 1957Explain, in terms of the reaction pathway, why adding a catalyst increases the rate of a reaction without changing the overall energy change of the reaction.
- 5th April 1957Hexadecane (C16H34) is cracked to produce dodecane (C12H26) and one other product. Calculate the molecular formula of the other product.
- 6th April 1957State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 7th April 1957How is the uncertainty in a set of repeated readings usually estimated?
- 8th April 1957Define electric current.
- 9th April 1957A source has a half-life of 5 days and an initial activity of 1600 Bq. What is its activity after 15 days?
- 10th April 1957A resultant force of 60 N acts on a wheelbarrow of mass 15 kg. Calculate its acceleration.
- 11th April 1957State the difference between a permanent magnet and an induced magnet.
- 12th April 1957State whether a galaxy moving towards Earth would show a red-shift or a blue-shift in its light.
- 13th April 1957Calculate the surface area to volume ratio of a cube of side 2 cm.
- 14th April 1957A student measures the mean diameter of a zone of inhibition as 12 mm. Calculate its radius.
- 15th April 1957State two things excess glucose can be converted into for storage in the human body.
- 16th April 1957Define homozygous.
- 17th April 1957Give the resolution of a burette that can be read to the nearest half of a small division.
- 18th April 1957Why is an atom electrically neutral?
- 19th April 1957State the law of conservation of mass.
- 20th April 1957Molten zinc chloride, ZnCl2, is electrolysed using inert electrodes. Write the half equation for the reaction at (a) the cathode, and (b) the anode.
- 21st April 1957A tangent drawn to a volume-time graph at 15 seconds passes through the points (5 s, 6 cm3) and (25 s, 66 cm3). Calculate the rate of reaction at 15 seconds.
- 22nd April 1957Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
- 23rd April 1957Explain why carbon monoxide is dangerous even though it has no smell.
- 24th April 1957Why can no device be 100 percent efficient?
- 25th April 1957Why is melting described as a physical change?
- 26th April 1957A resultant force of 45 N acts on an object of mass 9.0 kg. Calculate its acceleration. Use F = m x a.
- 27th April 1957State the difference between a transverse wave and a longitudinal wave.
- 28th April 1957Name the force that keeps the planets in orbit around the Sun.
- 29th April 1957Convert 0.05 mm into micrometres.
- 30th April 1957State the function of the valves in the heart and in veins.