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pH of water is 7.0 at 25^(@)C. If water ...

`pH` of water is `7.0` at `25^(@)C`. If water is heated to `70^(@)C`, the:

A

pH will decrease and solution becomes acidic

B

pH will increase

C

pH will remain constant as 7

D

pH will decrease but solution will be neutral

Text Solution

Verified by Experts

The correct Answer is:
D
On heating water `K_(w)` increases and thus pH scale for neutrality change form 7 to some lower value, i.e., `6.8` or `6.9` depending upon `K_(w)` values.
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P BAHADUR-IONIC EQUILIBRIUM-Exercise3A
  1. The decreasing trend of acidic nature of trihalides of boron is:

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  2. The mixed salt among the following is:

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  3. pH of water is 7.0 at 25^(@)C. If water is heated to 70^(@)C, the:

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  4. When HCI gas is passed through a saturated solution of common salt, pu...

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  5. The inerferring radicals interfere in the test of usal inorganic analy...

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  6. Given, HF+H(2)Ooverset(K(a))rarrH(3)O^(+)+F^(-) F^(-)+H(2)Ooverset(K...

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  7. Isoelectric point is defined as the pH at which:

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  8. Which may be added to one litre of water to act a buffer?

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  9. The pH of an acidic buffer mixture is:

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  10. The principal buffer present in human blood is

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  11. The ratio of dissociation constant of two weak acids HA and HB is 4. A...

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  12. The pK(a) of acteylsalicylic acid (aspirin) is 3.5. The pH of gastric ...

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  13. The reverse procees of neutralisation is:

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  14. When different types of salts have nearly same solubility product cons...

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  15. The solubility of AgI in NaI is lowest than that in pure water, becaus...

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  16. Which of the following is most soluble in water ?

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  17. The decreasing order of strength of the bases, OH^(-), NH(2)^(-), H-C-...

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  18. The best explanation for the solubility of MnS in dil. HCI is that:

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  19. pH for the solution of salt undergoing anionic hydrolysis (say CH(3)CO...

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  20. Solubility of BaF(2) in a solution of Ba(NO(3))(2), will be represente...

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