List of top Chemistry Questions on Chemical Reactions asked in TBSE Class X Board

What happens when an iron nail is dipped in copper sulfate solution? Write with equation.
Why are packets of oily or fatty foods flushed with nitrogen gas?
In the following reaction, which substance is oxidized and which is reduced?
\(4\text{Na} + \text{O}_2 \rightarrow 2\text{Na}_2\text{O}\)
Which of the following is not a chemical change?
Balance the chemical equation: \(\text{Fe} + \text{H}_2\text{O} \rightarrow \text{Fe}_3\text{O}_4 + \text{H}_2\)