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20 February, 12:58

PH paper is put in a solution, which turns red. What is this?

(A) A strong acid

(B) A strong alkali

(C) A weak acid

(D) A weak alkali

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Answers (1)
  1. 20 February, 16:39
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    Answer: (B) a strong acid

    Explanation:

    Acids turn blue pH paper red
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