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1)b)4Na+O2⟶2Na2O
2)d)A double displacement reaction
3)c)No reaction takes place
Iron is more reactive than copper.
Hence, Cu will not displace iron from iron sulphate, hence, no reaction will take place.
4)c)The solution remained colourless
Hydrogen is evolved by the reaction of dilute non oxidizing acids on reactive metal such as zinc and burns with a pop sound. The solution remained colourless.
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Answer:
- b option
- d option
- c option
- b option
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