Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q94 (CDS-I/2023) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Basic chemical principles Answer Verified

Consider the following statements: While diluting concentrated nitric acid solution 1. the concentration of [H₃O⁺] ions/volume increases 2. water must be added slowly to concentrated acid 3. acid must be added slowly to water Which of the statements given above is/are correct?

Result
Your answer: —  ·  Correct: C
Explanation

Diluting a concentrated acid like nitric acid involves specific chemical and safety principles. Statement 1 is incorrect because dilution results in a decrease in the concentration of hydronium ions ([H₃O⁺]) per unit volume, as the same number of ions is distributed over a larger volume of solvent [1]. Regarding safety, the process of mixing strong acids with water is highly exothermic. If water is added to concentrated acid (Statement 2), the intense heat generated can cause the mixture to splash out violently or break the glass container [1]. Therefore, the correct laboratory procedure is to always add acid slowly to water (Statement 3) while stirring. This ensures that the small amount of heat released is absorbed by the larger volume of water, preventing dangerous splattering. Thus, only statement 3 is correct.

Sources

  1. [1] Science , class X (NCERT 2025 ed.) > Chapter 2: Acids, Bases and Salts > Activity 2.10 > p. 24
How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
50%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

IAS · 2005 · Q19 Relevance score: 1.76

Consider the following statements: 1. During the process of osmosis, the solvent travels from the concentrated solution to the dilute solution. 2. In the reverse osmosis, external pressure is applied to the dilute solution. Which of the statements is/are correct?

NDA-II · 2008 · Q49 Relevance score: -0.83

Consider the following : The concentration of hydrogen ions in an aqueous solution is expressed by its 1. pH 2. pOH 3. pKa 4. pKw Which of the above is/are correct?

NDA-I · 2008 · Q29 Relevance score: -1.38

Consider the following statements: An external pressure P0 is applied to the surface of a liquid in a container. Then, 1. the pressure on all side-walls increases by P0 2. the pressure on the bottom wall increases by P„ 3. the pressure at all points inside the liquid increases by P0 Which of the statements given above are correct?

CDS-I · 2009 · Q66 Relevance score: -1.62

Aqua regia used by alchemists to separate silver and gold is a mixture of

CAPF · 2025 · Q105 Relevance score: -1.71

Consider the following statements: 1. Potassium carbonate is a salt of a weak acid and a weak base. 2. Ammonium nitrate is a salt of a strong acid and a weak base. 3. Ammonium acetate is a salt of a weak acid and a weak base. Which of the statements given above are correct?