An archaeologist analyzing a mortar sample from a Roman ruin adds dilute nitric acid to the sample, causing immediate effervescence as a gas is evolved.
Describe the test to show that this gas is carbon dioxide.
Practise Edexcel GCSE Chemistry Acids with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.