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What happen when moist blue litmus paper is introduced in the jar of sulphur dioxide?



A. Turns red
B. Remains blue
C. Becomes decolourised
D. Turns red and finally white

This question is part of CBSE 10th Science (Trial)
Asked by Meyya, Last updated: Jun 30, 2020

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2 Answers

Ken Wilson

Want to learn new things and share my knowledge

Ken Wilson, Marketing Analyst, MBA, Miami

Answered Jan 02, 2019

Sulphur becomes sulphur dioxide when sulphur is burned in a blue flame of oxygen gas. Sulphur dioxide reacts to the addition of water, becoming acidic, that is an acid solution. It is then correctly names sulphuric acid. It will change the blue litmus paper to red, but if the litmus paper is red to begin with, the colour does not change.

When combined with oxides other colours occur. This is why experiments with sulphur are popular with science teachers because the result is easily visible, prompts questions from the class and the various results are easily recorded.

 

John Smith

John Smith

Answered May 15, 2017

Turns red and finally white

Moist sulphur dioxide is acidic in nature and is a bleaching agent. Therefore, the color of paper first turn red and then it will changed to white.
 

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