Chemistry
Grade-8
Easy
Question
Which of the following statement is incorrect?
- Calcium carbide is used as a ripening agent like ethylene.
- Carbon monoxide is used to extract metals like iron from the mixture of other metals
- Calcium carbonate is a white crystalline solid having a melting point of 825oC.
- Sodium carbonate is sparingly soluble in water.
Hint:
Carbon's ability to reduce metals is based on its relative reactivity compared to the metal.
The correct answer is: Carbon monoxide is used to extract metals like iron from the mixture of other metals
The correct option is b)Carbon monoxide is used to extract metals like iron from the mixture of other metals.
Carbon monoxide has one carbon atom and one oxygen atom. It can't reduce all metals due to the presence of carbon. Carbon cannot reduce all metals. Carbon can only reduce metal oxides where the metal is less reactive than carbon.
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