Q. 34.6( 5 Votes )
Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed
A. Yellow in both acid and base.
B. Yellow in acid and red in base.
C. Pink in acid and yellow in base.
D. Red in acid and blue in base.
turmeric is natural indicator and change its color to red in presence of base. You might have seen any spot of turmeric on white clothes being turned to red when washed with soaps. This is because soaps are basic in nature.
Turmeric Turns Red with Soap Solution (Base)
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Dorji has a few bottles of soft drink in his restaurant. But, unfortunately, these are not labeled. He has to serve the drinks on the demand of customers. One customer wants acidic drink; another wants basic and third one wants neutral drink. How will Dorji decide which drink is to be served to whom?NCERT Science
Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.NCERT Science
Look at Figure 5.1 which shows solutions taken in test tubes A,B,C and D. What colour is expected when a piece of red litmus paper is dropped in each test tube? Nature of the solutions is given in the table for your help.
NCERT - Exemplar Science
Which of the following is an acid-base indicator?NCERT - Exemplar Science
A solution changes the colour of turmeric indicator from yellow to red. The solution isNCERT - Exemplar Science
‘Litmus’, a natural dye is an extract of which of the following?NCERT - Exemplar Science
Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively areNCERT - Exemplar Science
Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observedNCERT - Exemplar Science
On adding phenolphthalein indicator to a colourless solution, no change is observed. What is the nature of this solution?NCERT - Exemplar Science
Fill in the cross word given as Figure 5.2 with the help of the clues provided.
(2) The solution which does not change the colour of either red or blue litmus.
(4) Phenolphthalein gives pink colour in this type of solution.
(7) Colour of blue litmus in lemon juice.
(1) It is used to test whether a substance is acidic or basic.
(3) It is a natural indicator and gives pink colour in basic solution.
(5) Nature of ant’s sting.
(6) It is responsible for increase in temperature during a neutralisation reaction.NCERT - Exemplar Science