Daily Practice · GCSE Science

Daily Practice - GCSE Science

25th December 1993

5 questions · GCSE · 584 questions in this band

1
Moles, Formulae and Equations
In the equation 2H2 + O2 gives 2H2O, how many moles of water are formed from 3 mol of hydrogen?
2
Concentration, Yield and Atom Economy
Calculate the concentration in moles per cubic decimetre of a solution containing 0.5 mol in 250 cubic centimetres.
3
Chemical Changes
Explain why aluminium cannot be extracted from aluminium oxide by heating with carbon.
4
Reactivity, Acids and Salts
Name the salt made from zinc oxide and nitric acid.
5
Electrolysis
Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.

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 December 1993, including the monthly compilation PDF.