alleryStart learning →Acids turn blue litmus paper:
- colourless
- red
- blue
- green
Show answer and solution
Correct answer: B. red
Acids turn blue litmus red.
Indian Navy Pilot Acids, Bases and Salts — practice questions
Explore 2 free Acids, Bases and Salts questions in Indian Navy Pilot Science. Open each question or exercise to read its content, reference answers and available explanation.
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Worked practice questions
A solution turns red litmus blue and has pH = 11. The solution is:
- weakly acidic
- strongly acidic
- neutral
- strongly basic
Show answer and solution
Correct answer: D. strongly basic
pH > 7 means basic, and pH ≥ 10 indicates a fairly strong base.
Red-litmus-to-blue confirms it.
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