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Science (086) — AI-generated practice question

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

Q1. [1] straightforward thorough-understanding
Which of the following statements correctly explains why ionic compounds have high melting points? (A) The molecules of ionic compounds are very large and tightly packed. (B) A large amount of energy is needed to overcome the strong electrostatic forces between oppositely charged ions. (C) Ionic compounds consist of neutral atoms held together by weak intermolecular forces. (D) The electrons shared between ions create a strong covalent bond that is hard to break.
  1. A The molecules of ionic compounds are very large and tightly packed.
  2. B A large amount of energy is needed to overcome the strong electrostatic forces between oppositely charged ions.
  3. C Ionic compounds are insoluble in water, so they require more heat to melt.
  4. D The electrons shared between ions create a strong covalent bond that is hard to break.
Generated by claude-sonnet-4-6 · 2026-06-26 01:06 · grounding rag
Model Answer

(B) A large amount of energy is needed to overcome the strong electrostatic forces between oppositely charged ions.

Explanation

The textbook (Chapter 3, Section 3.3.1) states: "Ionic compounds have high melting and boiling points because a considerable amount of energy is required to break the strong inter-ionic attraction." Options A, C, and D are incorrect — ionic compounds do not consist of molecules, solubility is unrelated to melting point, and ionic bonds are not covalent bonds.

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