Sodium hydroscide truns blue
litmus paper red.
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We will find litmus paper in either red or blue colour. ... We should know that, when blue litmus turns to red, it indicates that the liquid sample is acidic. Turning blue litmus red, it shows that the solution has acidity of between the pH ranges of 4.5 to 8.3.
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Explanation:
True because it is a acid and acid turns blue litmus red
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