Study the following table carefully and identify X and Y.

Substance Turmeric Solution Indicator (Y)

Curd Yellow Red

X Red Blue

Toothpaste Red Blue

X: Tamarind; Y: Phenolphthalein

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X: Soap; Y: Litmus solution

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X: Soap; Y: China rose

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X: Vinegar; Y: Litmus solution

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Solution

The correct option is B X: Soap; Y: Litmus solution

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Question 3

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.

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

Q. Study the following table carefully and identify X, and Y.

Substance	Tumeric Solution	Indicator (Y)
Curd	Yellow	Red
X	Red	Blue
Toothpaste	Red	Blue

Q. Study the following table carefully and identify X, Y and Z.

Substance	TurmericSolution	Indicator (Y)	Indicator (Z)
Curd	Yellow	Red	Colourless
X	Red	Blue	Pink
Toothpaste	Red	Blue	Pink

Q. Sanya performed an experiment on the given solutions to observe the effect of various indicators on them. The observations recorded are given below.

1. Turmeric solution turns red in solutions 1 and 3.
2. China rose will turn green in solutions 2 and 4.
3. Red litmus will turn blue in solutions 1, 2, and 4.
4. Red cabbage extract will turn red in solutions 1 and 3.
Identify the incorrect observations.

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Substance	Turmeric Solution	Indicator (Y)
Curd	Yellow	Red
X	Red	Blue
Toothpaste	Red	Blue

Study the following table carefully and identify X and Y. Substance Turmeric Solution Indicator (Y) Curd Yellow Red X Red Blue Toothpaste Red Blue

The correct option is B X: Soap; Y: Litmus solution

Study the following table carefully and identify X and Y.

Substance Turmeric Solution Indicator (Y)

Curd Yellow Red

X Red Blue

Toothpaste Red Blue