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Indicator

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Question

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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Solution

Y is a stronger acid as strong acids give red colour and for a weak acid, the colour gradually fades to orange. So X is a weak acid.
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Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.

(a) What will be the action of solution A on litmus?

(b) What will be the action of solution B on litmus?

(c) Name any two substances which can give solutions like A.

(d) Name any two substances which can give solutions like B.

(e) What sort of reactions takes place when solution A reacts with solution B?

Q. 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
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Q. 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?

Q. Two solutions X and Y are tested with universal indicators. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid ?

Q. Solution A turns universal indicator from blue to purple whereas solution B turns universal indicator from orange to red.
1) Name any two substances that can give solutions like A.
2) Name any two substances that can give solutions like B.
If the answer to 1) is Lemon Juice and Hydrochloric Acid, then how is it possible, because one is a weak acid and the other is a strong acid.

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