Chemistry
Grade-10
Easy
Question
When a superheated stream passes through a metal M, a metal oxide is formed and when the red litmus paper is dipped inside the solution of this metal oxide, it changes to blue colour.
Identify the metal “M”.
- Magnesium oxide(MgO)
- Ferrosoferric oxide (Fe3O4)
- Calcium oxide(CaO)
- Cuprous oxide(Cu2O)
Hint:
Metal oxides are basic in nature and turn red litmus blue.
The correct answer is: Ferrosoferric oxide (Fe3O4)
When a superheated stream passes through a metal M, a metal oxide is formed and when the red litmus paper is dipped inside the solution of this metal oxide, it changes to blue colour.
M is Ferrosoferric oxide (Fe3O4). Metal oxides are basic in nature and turn red litmus blue.
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