NCERT · Class 7 · Science · Acids, Bases and SaltsWhat is the colour of blue litmus paper when dipped in a dilute hydrochloric acid solution?
Step-by-Step Solution
Acids turn blue litmus red. Therefore, when blue litmus paper is dipped in hydrochloric acid, its colour changes to red.
Detailed Options Breakdown
Option : Blue
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Acids, Bases and Salts.
Option 1: Red (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Green
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Acids, Bases and Salts.
Option 3: Colourless
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Acids, Bases and Salts.
💡 Study Guide: This question tests core syllabus concepts from Acids, Bases and Salts. For formulas, key summaries, and mock exam reference guides, read the full Acids, Bases and Salts Revision Notes.