Daily Practice · GCSE Science
June 1991 5-a-day
Every sheet in June 1991
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st June 1991Define homozygous.
- 2nd June 1991A gas syringe collects 48 cubic centimetres of gas in 40 seconds. Calculate the mean rate.
- 3rd June 1991Why do isotopes of an element react in the same way?
- 4th June 1991Calculate the Mr of calcium carbonate, CaCO3. (Ca = 40, C = 12, O = 16)
- 5th June 1991Molten zinc chloride, ZnCl2, is electrolysed using inert electrodes. Write the half equation for the reaction at (a) the cathode, and (b) the anode.
- 6th June 1991A 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.
- 7th June 1991State the reagent added, and the result, that shows a white solid contains sulfate ions.
- 8th June 1991State the two products of the complete combustion of a hydrocarbon fuel.
- 9th June 1991State one way to increase the efficiency of a motor.
- 10th June 1991Why is the density of a gas much lower than that of the same substance as a liquid?
- 11th June 1991A gardener pushes a mower with a force of 60 N through a distance of 8.0 m. Calculate the work done. Use W = F x s.
- 12th June 1991State the difference between a transverse wave and a longitudinal wave.
- 13th June 1991Name the force that keeps the planets in orbit around the Sun.
- 14th June 1991Name two structures found in a plant cell but not in an animal cell.
- 15th June 1991Why is the wall of the left ventricle thicker than that of the right ventricle?
- 16th June 1991Name the organelle in a plant cell where photosynthesis takes place.
- 17th June 1991Explain why sweating cools the body down.
- 18th June 1991State one abiotic factor that can affect the population of fish living in a pond.
- 19th June 1991Name one method used to sterilise fresh water during the production of potable water.
- 20th June 1991What type of bonding is present in a compound formed between a metal and a non-metal?
- 21st June 1991Write the word equation for the reaction between zinc and hydrochloric acid.
- 22nd June 1991State the two substances that react inside a hydrogen fuel cell.
- 23rd June 1991Name the catalyst used when an alkene reacts with hydrogen to form an alkane.
- 24th June 1991State the approximate percentage of nitrogen in today's atmosphere.
- 25th June 1991A spring is compressed. Which energy store increases?
- 26th June 1991State the potential difference and frequency of the UK mains supply.
- 27th June 1991What did Bohr add to the nuclear model?
- 28th June 1991A force of 40 N is applied 0.25 m from a pivot. Calculate the moment.
- 29th June 1991A rectangular coil carrying a current is placed in a magnetic field, with its two long sides parallel to each other. Explain why the coil rotates rather than moving in a straight line.
- 30th June 1991Why must the same volume of solution be used in every tube in an enzyme investigation?