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NTA Abhyas NEET2020ChemistryIonic EquilibriumPractice

p H of a 1 0 - 10 M N a O H is nearest to:

Options

  1. A10
  2. B7
  3. C4
  4. D10.9

Correct answer

B. 7

Step-by-step solution

Apply common ion effect total [ O H - ] i o n = 1 0 - 10 + 1 0 - 7 p O H = - l o g ( 1 0 - 10 + 1 0 - 7 ) ∴ 10 − 10 < < 10 − 7 OH − = 10 − 7 pOH ≃ 7 pH ≃ 7

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