Change set

Pick exam & year, then Go.

Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q23 (CDS-I/2026) Science & Technology › Basic Science (Physics, Chemistry, Biology)

Consider the following statements: 1. Concentrated H2SO4 is used as a dehydrating agent in esterification reaction. 2. The hydrophilic part of soap is oil and it dissolves in water. 3. Nickel is used as a catalyst in converting vegetable oil into fat. Which of the statements given above are correct?

Result
Your answer: —  ·  Correct: D

Explanation

Statement 1 is correct: During esterification (reaction between an alcohol and a carboxylic acid), concentrated H2SO4 acts as both a catalyst and a dehydrating agent. It removes the water produced, which helps shift the chemical equilibrium to favor the formation of the ester.

Statement 2 is incorrect: Soap molecules are amphiphilic. The hydrophilic (water-loving) part is the ionic head, which interacts with water. The hydrophobic (water-fearing) part is the long hydrocarbon chain, which interacts with oil and grease. The statement incorrectly claims the hydrophilic part is oil.

Statement 3 is correct: Hydrogenation is the process used to convert liquid vegetable oils (unsaturated fats) into solid fats (saturated fats like vanaspati ghee). This reaction involves adding hydrogen in the presence of a catalyst, most commonly Nickel (Ni).

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.
57%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

NDA-II · 2009 · Q90 Relevance score: 0.32

Consider the following statements : 1. Soap cannot be used in acidic water. 2. Ionic part of a soap is —COO~.Na+. 3. Soap dissolves in water faster than detergent. Which of the statements given above is/are correct?

CDS-I · 2023 · Q94 Relevance score: 0.25

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?

NDA-I · 2025 · Q71 Relevance score: -1.97

Which one of the following statements is NOT correct?

IAS · 2012 · Q42 Relevance score: -2.83

Consider the following statements : Chlorofluorocarbons, known as ozone-depleting substances, are used 1. in the production of plastic foams 2. in the production of tubeless tyres 3. in cleaning certain electronic components 4. as pressurizing agents in aerosol cans Which of the statements given above is/are correct?