During an investigation of an unknown mineral sample extracted from a cave, a geologist treats a portion of the powder with dilute hydrochloric acid.
A vigorous effervescence is observed, and the evolved gas is bubbled through a solution of calcium hydroxide (limewater), which turns cloudy.
Give the name of this gas.
Practise Edexcel GCSE Chemistry Qualitative analysis: tests for ions with exam-style questions for Foundation and Higher tier. 127 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.
