Chemistry
Burning of a metal is an example of :
- Decomposition reaction
- Combination reaction between an element and a compound
- Direct combination reaction between two elements
- Displacement reaction
Answer
Direct combination reaction between two elements
Reason — A reaction in which two elements react to form a single substance is called a direct combination reaction between two elements.
When a metal, for example Magnesium, is burnt, it reacts with oxygen to form a new compound magnesium oxide.
2Mg + O2 ⟶ 2MgO
Hence, burning of a metal is a direct combination reaction between two elements.
Related Questions
Which of the of following is not a chemical change.
- Rusting of iron
- Iron is magnetised
- Potassium is dissolved in water
- Magnesium wire is burnt
Heating of zinc nitrate is a …………… reaction.
- Displacement
- Combination
- Decomposition
- Redox
Formation of white precipitate on mixing sodium chloride solution and silver nitrate solution is an example of …………… reaction.
- Combination
- Decomposition
- Displacement
- Double decomposition
A brown substance A on heating in air turns black forming another substance B. Substances A and B are:
- A = Fe and B = FeO
- A = Zn and B = ZnO
- A = Cu and B = CuO
- A = Pb and B = PbO