Question

2. A student added zinc granules to iron sulphate solution and made the
following observations, identify the incorrect observation.
i. Pale green solution becomes colourless.
ii. Black deposits are seen on zinc granules.
iii. Colourless solution becomes pale green.
iv. White precipitate is formed.​

Answer 1

The incorrect option is no.(iii).

Explanation:

This is because, in the reactant side there's Zinc Granules ( Grey in colour), and Ferrous Sulphate solution ( Pale green in colour). The product is Zinc sulphate ( colourless). So it's not matching the above statement.

Answer 2

The incorrect observation that the zinc granules to iron sulphate solution from the given option is, Colourless solution becomes pale green.

Option - iii

Explanation:

• As we are given a certain reaction in which weekend the product as Zinc sulphate which occurs due to the reaction that takes place between ferrous sulphate and on the granular form of zinc these two elements mix together and displacement reaction is taking place where iron is replaced by zinc.
• Hence we see two coloured solutions one that is green colour another that is pale green in colour to mix together and form a result which is colourless in nature.

To know more;

What will happen when zinc granules are added in ferrous sulphate solution ?

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