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Question 13Asked in RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)

A solution has a pH of 8. If it is diluted with an equal volume of water, what will happen to its pH?

  1. AThe pH will decrease.
  2. BThe pH will increase.
  3. CThe pH will remain the same.
  4. DIt will become neutral.
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Correct answer: (D) It will become neutral.

Explanation

Official answer key: (4) It will become neutral. Correct answer should be (1) The pH will decrease. Diluting a basic solution (pH 8) with an equal volume of water halves [OH⁻], so the pH falls to about 7.7. It moves towards 7 but does not become exactly neutral. Scoring follows the official key.

From RRB JE CBT-1 PYQ 18 Dec 2024, Shift 2 (12:45 PM)

This is question 13 of RRB JE CBT-1 PYQ 18 Dec 2024, Shift 2 (12:45 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.