Which of the following can change the colour of red litmus to blue?

Sodium hydroxide

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Sulphuric acid

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Vinegar

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Lemon juice

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Solution

The correct option is A
Sodium hydroxide

Sodium hydroxide (Base) can change the colour of red litmus to blue.

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a) A solution of calcium hydroxide is added to red litmus paper

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Q. Which of the following can change the colour of red litmus to blue?

Bee stings can be treated with____________

A) vinegar b) sodium hydrogen carbonate c) potassium hydroxide d) lemon juice

Question 19

Fill the blanks in the following sentences
(a) Lemon juice and vinegar taste ___ because they contain ___
(b) Turmeric and litmus are ___acid-base indicators.
(c) Phenolphthalein gives___colour with lime water
(d) When an acidic solution is mixed with a basic solution, they___ each other forming a and water.

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Which of the following can change the colour of red litmus to blue?

The correct option is A Sodium hydroxide Sodium hydroxide (Base) can change the colour of red litmus to blue.

The correct option is A
Sodium hydroxide

Sodium hydroxide (Base) can change the colour of red litmus to blue.