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Question

Ritu was given four test tubes containing different solutions as shown in figure. Choose the incorrect option.

1 and 2 turn blue litmus to red.
1 and 4 turn China rose indicator to green.
Phenolphthalein remains colourless with 2 and 3.
4 turns turmeric solution to red.

A

1 and 2 turn blue litmus to red.

B

1 and 4 turn China rose indicator to green.

C

4 turns turmeric solution to red.

D

Phenolphthalein remains colourless with 2 and 3.

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Solution

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Indicators are substances that are used to test whether a substance is acidic or basic or neutral in nature. They change their color when added to a solution having acidic or basic substances. A solution of china rose turns green in basic solution and bright pink in acidic medium. So 1 is acidic in nature so does not give green solution.
Turmeric gives red color in basic medium in tube 4.

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Similar Questions

Q1

During the science activity, class teacher arranged the test tube as shown in the figure and asked students to predict the effect of various indicators on the given solutions.
Which of the following statements are correct?
I. Turmeric solution will turn red in test tubes

1

and

4

.
II. Methyl orange will turn yellow in test tubes

1

and

3

.
III. China rose indicator will turn dark pink in test tube

2

.
IV. Blue litmus solution will turn red in test tubes

1

and

4

.

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Q2

The indicators which turn red in acid solution are :

(a) turmeric and litmus

(b) phenolphthalein and methyl orange

(c) litmus and methyl orange

(d) phenolphthalein and litmus

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Q3

Ritu was given four test tubes containing different solutions as shown in figure. Choose the incorrect option.

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Q4

Q58) Consider the following statements about acid-base indicators.

i) Phenolphthalein gives a pink colour if the solution is acidic.

ii) China rose indicator turns acidic solutions to dark pink.

iii) Blue litmus turns red for a basic solution.

Which of the above statements are true?

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Q5

A student was given four unknown solutions in test-tubes marked A, B, C and D and asked to test them with universal indicator solution. He observed that on putting universal indicator solution, the solutions A, B, C and D turned blue, orange, green and red respectively. The test-tube which contains sodium chloride solution is :
(1) A
(2) B
(3) C
(4) D

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