📚 CBSE Grade-10 Study Guide
Home › Science (086) (AI practice)

Science (086) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [1] medium exam-ready
Heating ethanol at 443 K with excess concentrated sulphuric acid produces ethene. The role of concentrated sulphuric acid in this reaction is:
  1. A Oxidising agent
  2. B Reducing agent
  3. C Dehydrating agent
  4. D Catalyst
Generated by claude-sonnet-4-6 · 2026-06-26 01:06 · grounding rag
Model Answer

Answer: C — Dehydrating agent

Concentrated H₂SO₄ removes water from ethanol during dehydration, converting it to ethene at 443 K. It acts as a dehydrating agent.

Source: Chapter 4, Section 4.4.1 (Properties of Ethanol)

---

Explanation

The textbook explicitly states: "The concentrated sulphuric acid can be regarded as a dehydrating agent which removes water from ethanol." Examiners expect you to recall this specific term. Do not confuse it with a catalyst (though H₂SO₄ can act as one in esterification) — here, the question context points to dehydration, making C the only correct option.

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.