Exams › JEE Main › Chemistry

Prolonged heating is avoided during the preparation of ferrous ammonium sulphate to (1) Prevent hydrolysis (2) Prevent reduction (3) Prevent breaking (4) Prevent oxidation

1. (1) Prevent hydrolysis
2. (2) Prevent reduction
3. (3) Prevent breaking
4. (4) Prevent oxidation

Correct answer: (4) Prevent oxidation

Solution

Prolonged heating can lead to the oxidation of ferrous ions to ferric ions, which alters the desired properties of ferrous ammonium sulfate. Therefore, controlling the heating time is essential to maintain the ferrous state.

Related JEE Main Chemistry questions

• A transition metal M gives a volatile chloride whose vapour density is 94.8. If this chloride contains 74.75% chlorine by mass, what is the formula of the metal chloride?
• What is the ratio of the magnetic moments of Fe(III) and Co(II)?
• Which of the following species contains the greatest number of unpaired electrons?
• Which of the following species contains an atom in the +6 oxidation state?
• Which of the following pairs contains compounds in which the metal in each case is present in its maximum possible oxidation state?
• When sodium nitroprusside is introduced into an alkaline solution containing sulphide ions, a purple-coloured ion is formed. This colour is due to the formation of which species?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →