18. Match the columns
Column I Column II
(A) Aqueous solution of CO2 (P) Turns phenolphthalein pink
(B) 10 mL water + 20 mL milk of Magnesia (Q) pH is more than 7
(C) Lime water (R) Turns red litmus blue
(D) Aqueous solution of sodium oxide (S) Turns blue litmus red
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