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.

I and III only

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I, II, and IV only

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I and II only

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I, III, and IV only

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Solution

The correct option is A I and III only

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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

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Solution	Change in Indicator			Acid/Alkali
	Litmus	Phenolphthalein	Methyl orange
1.	...	No change	...
2.	...	...	Orange colur turns red
3.	Red litmus turns blue	...	...

Q. During a science activity, the teacher arranged a 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 tube B and C.
II. Litmus solution will turn blue in test tube A.
III. Red cabbage extract will turn green in test tube A.
IV. Litmus solution will turn red in test tubes Band C.

Q. A/an solution will turn red cabbage extract pink and blue litmus red.

Q. Alex had two solutions: X and Y. He added a few drops of turmeric water in solution X and observed that the solution X turned yellow in colour. On adding turmeric water to solution Y, he observed that the solution turned red in colour. From the options given below, identify the solutions that match Alex’s observations.

[0.8 mark]

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