Daily Practice

GCSE Science

29th August 1990

5 questions · GCSE · 584 questions in this band

1
Structures, Properties and Nanoparticles
Give one use of nanoparticles and one associated risk.
2
Quantitative Chemistry
Magnesium is burned in an open crucible and the mass increases. Explain why.
3
Moles, Formulae and Equations
Why is the amount of product directly proportional to the amount of limiting reactant?
4
Concentration, Yield and Atom Economy
Give the formula for percentage yield.
5
Chemical Changes
Write the word equation for the reaction between zinc and hydrochloric acid.

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