📚NCERT Questions — NCERT10

When an iron nail is dipped in copper sulphate solution, the solution's blue colour fades. What causes this change?

Which of the following elements is more reactive than copper, allowing it to displace copper from its compounds?

If copper metal were dipped in a solution of zinc sulphate, what would be observed?

The process by which iron articles get coated with a reddish-brown powder when left for some time is commonly known as:

In Activity 1.3, when dilute hydrochloric acid is added to zinc granules, what observation indicates a chemical reaction?

What type of reaction is the opposite of a combination reaction?

In the electrolysis of water (Activity 1.7), which gas is collected at the cathode?

When balancing a chemical equation, what is the first step according to the hit-and-trial method?

What happens to fats and oils when they are oxidised, leading to a change in their smell and taste?

In the reaction Pb(s) + CuCl₂(aq) → PbCl₂(aq) + Cu(s), which element is being displaced?