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Which one of the following solution on mixing will not form a precipitate?
  • a)
    Lead acetate and potassium iodide
  • b)
    Lead nitrate and sulphuric acid
  • c)
    Iron sulphide and dilute sulphuric acid
  • d)
    Potassium bromide and silver nitrate
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Which one of the following solution on mixing will not form a precipit...
Explanation:

Iron sulphide and dilute sulphuric acid:
- When iron sulphide reacts with dilute sulphuric acid, it forms hydrogen sulfide gas and iron(II) sulfate.
- Since hydrogen sulfide gas is a gas and not a solid, no precipitate is formed in this reaction.
- Therefore, this combination will not form a precipitate.

Lead acetate and potassium iodide:
- When lead acetate reacts with potassium iodide, it forms lead iodide which is insoluble in water and hence, a yellow precipitate of lead iodide is formed.

Lead nitrate and sulphuric acid:
- When lead nitrate reacts with sulphuric acid, it forms lead sulfate which is insoluble in water and hence, a white precipitate of lead sulfate is formed.

Potassium bromide and silver nitrate:
- When potassium bromide reacts with silver nitrate, it forms silver bromide which is insoluble in water and hence, a cream precipitate of silver bromide is formed.
Therefore, out of the given options, only the combination of iron sulphide and dilute sulphuric acid will not form a precipitate.
Free Test
Community Answer
Which one of the following solution on mixing will not form a precipit...
It forms solution of ferrous sulphate and hydrogen sulphide gas. 
FeS + H2SO4 → FeSO​4 + H2S.
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Which one of the following solution on mixing will not form a precipitate?a)Lead acetate and potassium iodideb)Lead nitrate and sulphuric acidc)Iron sulphide and dilute sulphuric acidd)Potassium bromide and silver nitrateCorrect answer is option 'C'. Can you explain this answer?
Question Description
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