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Questions and Answers
What is the product formed when magnesium ribbon burns in the presence of oxygen?
What is the product formed when magnesium ribbon burns in the presence of oxygen?
- Magnesium oxide (correct)
- Magnesium hydroxide
- Magnesium chloride
- Magnesium sulfate
Which observation helps determine whether a chemical reaction has taken place?
Which observation helps determine whether a chemical reaction has taken place?
- Change in volume
- Evolution of a gas (correct)
- Change in shape
- Change in density
What happens when dilute hydrochloric acid or sulphuric acid is added to lead nitrate?
What happens when dilute hydrochloric acid or sulphuric acid is added to lead nitrate?
- It becomes transparent
- It turns red
- A precipitate forms (correct)
- It evaporates instantly
Which substance is formed when zinc granules react with potassium iodide solution?
Which substance is formed when zinc granules react with potassium iodide solution?
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What is the product formed when a magnesium ribbon is burnt in air?
What is the product formed when a magnesium ribbon is burnt in air?
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