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Question

______ turns red litmus to blue.
  1. Acid
  2. Base
  3. Both of A and B
  4. None of A or B

A
Acid
B
Base
C
Both of A and B
D
None of A or B
Solution
Verified by Toppr

Bases turn red litmus blue and acids turn blue litmus red.
Litmus is an indicator used to determine whether a solution is acidic or basic by changing its colour.

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