Formation of white insoluble barium sulphate proves which dual identification?
Answer and explanation
Correct answer: Double displacement and precipitation
The governing concept is a double-displacement precipitation reaction. In a reaction such as BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl, the ions exchange partners, so it is double displacement. BaSO₄ is insoluble and appears as a white solid, so the reaction also involves precipitation. Therefore option A identifies both features; the other choices describe unrelated reaction types.
Frequently asked questions
What is the correct answer to this question?
Double displacement and precipitation
Why is this the correct answer?
The governing concept is a double-displacement precipitation reaction. In a reaction such as BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl, the ions exchange partners, so it is double displacement. BaSO₄ is insoluble and appears as a white solid, so the reaction also involves precipitation. Therefore option A identifies both features; the other choices describe unrelated reaction types.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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