Question

Choose the reactions which are not feasible.
I. Iron + Zinc sulphate $\to$ Iron sulphate + Zinc
II. Magnesium + Silver nitrate $\to$ Magnesium nitrate + Silver
III. Copper + dil. sulphuric acid $\to$ Copper sulphate + $H_2$
IV. Zinc + Ferrous sulphate $\to$ Iron + Zinc sulphate

• A. I, II and III
• B. III and IV only
• C. I and III only
• D. All of these

Answer 1

The correct option is C I and III only

Zinc is more reactive than iron, hence when added' to iron (II) sulphate, it can displace iron metal and the colour of the solution fades from green to colourless due to the formation of zinc sulphate.

reaction 1 opposite is done

Copper does not react with dilute sulphuric acid. So, no reaction takes place when dilute sulphuric acid is poured on a copper plate. But when concentrated sulphuric acid is poured over the copper plate, effervescence is observed.

Option C is correct answer.