Name an indicator which is red in acid solution but turns blue in basic solution.

Academic Chemistry NCERT Class 10

Litmus is an indicator that is red in acid solution but turns blue in a basic solution.

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Updated on: 10-Oct-2022

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Name an indicator which is pink in alkaline solution but turns colourless in acidic solution.
Two Solution X and Y are tested the universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?
An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?Baking powderLimeAmmonium hydroxide solutionHydrochloric acid
Two solutions X and Y are tested with universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?
Which of the following observations is true about dilute solution of acetic acid?(a) It smells like vinegar and turns red litmus blue.(b) It smells like onion and turns blue litmus blue.(c) It smells like orange and turns red litmus blue.(d) It smells like vinegar and turns blue litmus red.
Which one of the following solutions would you use to test the pH of a given sample?(1)blue litmus solution(2)red litmus solution(3) universal indicator solution(4)mixture of red and blue litmus solution
True or False:Nitric acid turns red litmus blue
Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.(a) What will be the action of solution A on litmus? (b) What will be action of solution B on litmus? (c) Name any two substances which can give solutions like A. (d) Name any two substances which can give solutions like B. (e) What sort of reaction takes place when solution A reacts with solution B?
A salt when dissolved in distilled water gives a clear solution which turns red litmus blue. Explain the phenomenon.
What do we observe on pouring acetic acid on red and blue litmus papers?(A) Red litmus remains red and blue litmus turns red.(B) Red litmus turns blue and blue litmus remains blue.(C) Red litmus turns blue and blue litmus turns red.(D) Red litmus becomes colourless and blue litmus remains blue.
A student added blue litmus solution to a colourless aqueous solution. The solution turned red. Which one of the following chemicals should be added in excess so that the change in colour is reversed?(1) ethanol solution (2) caustic soda solution (3) hydrochloric acid solution (4) vinegar solution
A solution turns red litmus blue. Its pH is likely to be:(a) 1 (b) 4 (c) 5 (d) 10
A solution turns blue litmus red. Its pH is likely to be:(a) 7 (b) 5 (c) 8 (d) 14
(a) What is an indicator? Name three common indicators.(b) Name the acid-base indicator extracted from lichen. (c) What colour does the turmeric paper turn when put in an alkaline solution?
What is Indicator and Litmus Solution?

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