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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 exam-ready
In a balanced chemical equation, the notation '(aq)' written alongside a chemical formula indicates that the substance is: (A) Acidic in nature (B) Dissolved in water (C) Present in a gaseous state (D) An insoluble solid suspended in water
  1. A It shows the substance is acidic
  2. B It indicates the substance is dissolved in water
  3. C It indicates the substance is in a gaseous state
  4. D It shows the substance is aqueous and insoluble
Generated by claude-sonnet-4-6 · 2026-06-26 00:53 · grounding rag
Model Answer

(B) It indicates the substance is dissolved in water.

The notation (aq) stands for aqueous, meaning the substance is present as a solution in water.

Source: Chapter 1, Section 1.1.2 (Writing Symbols of Physical States)

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Explanation

The textbook explicitly states: "The word aqueous (aq) is written if the reactant or product is present as a solution in water." The four state symbols to remember are: (s) – solid, (l) – liquid, (g) – gas, (aq) – dissolved in water. 'aq' has nothing to do with acidity or insolubility — those are common traps in this MCQ.

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