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Kanika identified the nature of few substances with the help of three different indicators. She listed down her observations in the given table with some blanks.
S. No Substance Red litmus paper Turmeric solution China rose indicator
1. Lime water Blue p green
2. Curd no change no change q
3. Table salt no change no change no change
4. Toothpaste r red s
5. Lemon juice no change no change magenta
Identify p, q, r and s

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p – Magenta, q – Green, r- Blue, s –Magenta

p – Red brown, q – Magenta, r – Blue, s – Green

p – Blue, q – Magenta, r – Red, s – Green

p – Green, q – Red, r – Magenta, s – Blue

answer is B.

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Detailed Solution

An indicator is the substance which can show different colours in acidic or basic medium.

Indicator	Acidic Medium	Basic Medium
Litmus	Blue to Red	Red to Blue
Turmeric	Yellow	Red Brown
China Rose	Dark Pink	Green

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