The indicators which turns red in acid solution are:(a) Turmeric and litmus
(b) Phenolphthalein and methyl orange
(c) Litmus and methyl orange
(d) Phenolphthalein and litmus

Academic Chemistry NCERT Class 10

Correct Answer: (c) Litmus and methyl orange.

Explanation: Litmus and methyl orange turn red in acidic solution.

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Updated on: 10-Oct-2022

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The indicator which produces a pink colour in an alkaline solution:(a) Methyl orange(b) Turmeric paper(c) Phenolphthalein(d) Litmus paper
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.
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.
What colours do the following indicators turn when added to an acid (such as hydrochloric acid)(a) litmus (b) methyl orange
What colour do the following indicators turn when added to a base or alkali (such as sodium hydroxide)?(a) Methyl orange (b) Litmus (c) Red cabbage extract
True or False:Nitric acid turns red litmus blue
A student puts a drop of reaction mixture of a saponification reaction first a blue litmus paper and then on a red litmus paper. He may observe that:There is no change in the blue litmus paper and the red litmus paper turns white.There is no change in the red litmus paper and the blue litmus paper turns red.There is no change in the blue litmus paper and the red litmus paper turns blue.No change in colour is observed in both the litmus papers.
Fill in 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 _____ and water.
Two solutions A and B have pH values of 3.0 and 9.5 respectively. Which of these will turn litmus solution from blue to red and which will turn phenolphthalein from colourless to pink?
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?
P and Q are aqueous solutions of sodium chloride and sodium hydroxide respectively. Which of these will turn:(a) blue litmus red? (b)red litmus blue?
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
What do you mean by Blue litmus paper and Red litmus paper?
What is Indicator and Litmus Solution?
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?

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