Question

An acid does not give red color with which of the following :(1) blue litmus (2) phenolptalein(3) methyn orange (4) none​

Answer 1

Answer:

none

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Answer 2

When blue litmus paper is dipped in acid then it turns into red colour, if methyl orange is mixed with acid the solution turns into red colour, but if phenolphthalein is mixed with acid then it turns into colourless solution

So the answer of your question is phenolphthalein...