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Chemistry CBSE Live product
Class 10 (2026-27)
Chemical reactions and equations
Introduction to chemical reactions and balancing equations
6.
Word equation to balanced chemical equation
Question:
4
m.
Choose the best answer:
1.
The magnesium ribbon is cleaned with sandpaper before it is burned in the air. Why?
Remove the deposited oxide layer on magnesium ribbon.
Remove the deposited carbonate layer on magnesium ribbon.
Remove the deposited sulphite layer on magnesium ribbon.
Remove the deposited nitride layer on magnesium ribbon.
2.
Choose the balanced equation for the following chemical reaction.
Iron + Copper sulphate → Iron sulphate + Copper
\(Fe\) + \(CuSO_4\) → \(FeSO_8\) + \(Cu\)
\(Ir\) + \(CuSO_4\) → \(FeSO_4\) + \(Cu\)
\(Fe\) + \(CoSO_4\) → \(FeSO_4\) + \(Cu\)
\(Fe\) + \(CuSO_4\) → \(FeSO_4\) + \(Cu\)
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