Exams › NEET › Chemistry

Which of the following statements about pH and H⁺ ion concentration is incorrect?

1. Addition of one drop of concentrated HCl in NH₄OH solution decreases pH of the solution.
2. A solution of the mixture of one equivalent of each of CH₃COOH and NaOH has a pH of 7.
3. pH of pure neutral water is not zero.
4. A cold and concentrated H₂SO₄ has lower H⁺ ion concentration than a dilute solution of H₂SO₄.

Correct answer: A cold and concentrated H₂SO₄ has lower H⁺ ion concentration than a dilute solution of H₂SO₄.

Solution

Cold and concentrated H₂SO₄ has a higher H⁺ ion concentration than a dilute solution due to its high dissociation in water. Thus, option D is incorrect.

Related NEET Chemistry questions

• A beaker contains a saturated solution of copper(l) chloride. Copper(l) chloride is slightly soluble salt with a solubility product of \( 1.2 \times 10^{-6} \) Which of the following salts when added to the solution would precipitate copper(l) chloride?
• The function of 'buffer solution' is:
• When \( C a(O H)_{2} \) attains solubility equilibrium, the:
• Predict if there will be any precipitate by mixing \( 50 \mathrm{mL} \) of \( 0.01 \mathrm{M} \) NaCl and 50 mL of \( 0.01 \mathrm{M} A g N O_{3} \) solution. The solubility product of \( A g C l \) is \( 1.5 \times \) \( 10^{-10} \)
• Calculate the ratio of \( H C O O^{-} \) and \( F^{-} \) in a mixture of \( 0.2 M \) HCOOH \( \left(K_{a}=\right. \) \( \left.2 \times 10^{-4}\right) \) and \( 0.1 M H F\left(K_{a}=6.6 \times\right. \) \( \left.10^{-4}\right) \)
• What is the [OH⁻] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)₂?

⚔️ Practice NEET Chemistry free + battle 1v1 →