Daily Practice

GCSE Science

27th January 1991

5 questions · GCSE · 584 questions in this band

1
Tests for Ions, Gases and Flame Tests
A solution gives a cream precipitate when acidified with dilute nitric acid and then treated with silver nitrate solution. Name the halide ion present.
2
Chromatography and Instrumental Analysis
Explain why the baseline is drawn in pencil rather than ink.
3
Chemistry of the Atmosphere
Give two processes that removed carbon dioxide from the early atmosphere.
4
The Atmosphere: Evolution and Greenhouse Gases
Name the two gases produced by photosynthesis and the substance it consumes alongside carbon dioxide.
5
Climate Change and Atmospheric Pollutants
Explain why burning a fuel can produce nitrogen oxides even if the fuel itself contains no nitrogen.

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 January 1991, including the monthly compilation PDF.