Test for ammonia gas which observation is expected?

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Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

Test for ammonia gas which observation is expected?

Explanation:
Ammonia gas is alkaline, so it turns damp red litmus blue. Bases raise the pH and turn red litmus blue, which is the hallmark observation for a basic gas like ammonia. It wouldn’t make limewater cloudy (that test detects carbon dioxide), and it wouldn’t relight a glowing splint (that test indicates oxygen). So the expected observation is the red litmus turning blue.

Ammonia gas is alkaline, so it turns damp red litmus blue. Bases raise the pH and turn red litmus blue, which is the hallmark observation for a basic gas like ammonia. It wouldn’t make limewater cloudy (that test detects carbon dioxide), and it wouldn’t relight a glowing splint (that test indicates oxygen). So the expected observation is the red litmus turning blue.

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