CBSE · Class 7 · Science · Physical and Chemical ChangesMagnesium ribbon on burning in air produces a white ash. When this ash is dissolved in water, it forms:
Step-by-Step Solution
Burning magnesium produces magnesium oxide. When dissolved in water, it forms magnesium hydroxide, which is basic in nature.
Detailed Options Breakdown
Option : Magnesium oxide
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Physical and Chemical Changes.
Option 1: Magnesium hydroxide (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Magnesium carbonate
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Physical and Chemical Changes.
Option 3: Magnesium chloride
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Physical and Chemical Changes.
💡 Study Guide: This question tests core syllabus concepts from Physical and Chemical Changes. For formulas, key summaries, and mock exam reference guides, read the full Physical and Chemical Changes Revision Notes.