Daily Practice

GCSE Science

18th October 1964

5 questions · GCSE · 584 questions in this band

1
Moles, Formulae and Equations
Calculate the mass of 0.25 mol of sodium hydroxide, NaOH. (Na = 23, O = 16, H = 1)
2
Concentration, Yield and Atom Economy
Give the formula for atom economy.
3
Chemical Changes
Write the word equation for the reaction between zinc and hydrochloric acid.
4
Reactivity, Acids and Salts
Why is aluminium extracted by electrolysis rather than by reduction with carbon?
5
Electrolysis
In the industrial extraction of aluminium, explain why the carbon anodes need to be replaced regularly.

You are looking at an earlier sheet. Today's sheet is the one that adds a day.

Your run is kept in this browser only, and there is no account.

Any date always gives the same five questions, so a sheet can be set again or shared. All of October 1964, including the monthly compilation PDF.