Which litmus paper will turn red after adding hydrochloric acid?
White litmus
Blue litmus
Red litmus
Green litmus
A
Red litmus
B
Green litmus
C
Blue litmus
D
White litmus
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Solution
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Blue litmus is turned to red by adding an acid to it. As hydrochloric acid is a strong acid, it turns the blue litmus paper to red.
Hence, option A is correct.
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