Daily Practice · GCSE Science
April 1991 5-a-day
Every sheet in April 1991
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 1991State the only substance produced when a hydrogen fuel cell reacts pure hydrogen with pure oxygen.
- 2nd April 1991Propene (C3H6) reacts with steam in the presence of a catalyst. Name the catalyst, and name the type of compound formed.
- 3rd April 1991Give two human activities that increase the amount of greenhouse gases in the atmosphere.
- 4th April 1991A 5.0 kg object is lifted 3.0 m. Calculate its gain in gravitational potential energy (g = 9.8 N/kg).
- 5th April 1991Give the colour and function of the earth wire.
- 6th April 1991What observation showed the nucleus is positively charged and very small?
- 7th April 1991State two factors, other than depth, that affect the pressure at a given point in a liquid.
- 8th April 1991State the name of the rule used to find the direction of the force on a current-carrying wire in a magnetic field, and name the three quantities it relates.
- 9th April 1991A student measures 24 cubic centimetres of gas in 3 minutes. Calculate the rate.
- 10th April 1991State two ways that bile aids the digestion of fats.
- 11th April 1991Give one way of reducing the spread of malaria.
- 12th April 1991State what is meant by negative feedback.
- 13th April 1991Name the scientist who proposed the three-domain system of classification, and name the three domains.
- 14th April 1991State the relative charge of a neutron.
- 15th April 1991Why do elements in the same group have similar chemical properties?
- 16th April 1991Why is the amount of product directly proportional to the amount of limiting reactant?
- 17th April 1991A reaction profile shows the reactants at 150 kJ and the peak (activation energy point) at 195 kJ. Calculate the activation energy.
- 18th April 1991State the effect of increasing the temperature on the position of equilibrium of a reaction whose forward reaction is exothermic.
- 19th April 1991A solution forms a green precipitate with sodium hydroxide solution. Which ion is present?
- 20th April 1991Give the equation for wave speed and its units.
- 21st April 1991A component has a current of 5.0 A and a resistance of 8.0 ohm. Calculate the power dissipated using P = I^2 x R.
- 22nd April 1991Why does reducing the volume of a gas increase the pressure even though the molecules do not speed up?
- 23rd April 1991A car's velocity increases from 8 m/s to 20 m/s over 4 seconds. Calculate its acceleration.
- 24th April 1991State one medical use of X-rays and one safety precaution taken when X-rays are used in a hospital.
- 25th April 1991State two uses of artificial satellites.
- 26th April 1991Give one risk of stem cell treatment.
- 27th April 1991Why does a potometer measure water uptake rather than transpiration directly?
- 28th April 1991Why does the rate of photosynthesis fall at very high temperatures?
- 29th April 1991State one difference between selective breeding and genetic engineering.
- 30th April 1991Explain why large-scale deforestation increases the concentration of carbon dioxide in the atmosphere.