P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn :
P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn :
(a) blue litmus red ?
(b) red litmus blue ?
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(a) No solution will turn blue litmus to red.
(b) Solution Q (sodium hydroxide) will turn red litmus blue.
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