A student has four samples A,B,C and D containing dilute HCl, aq.KCl, dilute
NaOH and distilled water respectively. The solutions with equal pH are____.
a. A and B
b. B and C
c. C and D
d. B and D
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Answer: B aq KCl and D distilled water will have equal pH. Explanation: C is dil NaOH , which is a base hence its pH would be greater than 7 , D is distilled water which is neutral hence pH would be 7 .
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