Cambridge IGCSE Combined Science practice
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At a glance
MCQ
Type
cambridge_mcq
Style
Topic
The characteristic properties of acids and bases
Exam-style question
What color does litmus paper turn in an alkaline solution?.
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Question 1 of 5
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Description
Indicators such as litmus and methyl orange are commonly used to test the acidity or basicity of solutions. Litmus paper turns blue in alkaline solutions, while methyl orange changes from red to yellow in the presence of alkalis.
Explain how alkalis affect indicators like litmus and methyl orange.
Aim for approximately 3 distinct marking points.