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The Sulphide which is insoluble in dilute hydrochloric acid is…

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The Sulphide which is insoluble in dilute hydrochloric acid is…

A. FeS

B. CuS

C. ZnS

D. NaS

QUICK ANSWER…

B

SOLUTION…  

We are required to identify the sulphide that is least likely to dissolve in dilute hydrogen chloride.

The further down a metal is in the electrochemical series, the more likely it is for its sulphide to evade dissolution.

Copper sulphide, silver sulphide, gold sulphide, and lead sulphide tend to dissolve least in the dilute acid.

Now for the right answer to the above question:

  1. Option A is incorrect.
  2. Option B is correct.
  3. C is incorrect.
  4. D is not the correct answer.

QUICK TIPS…

You may please note these/this:

  • The further down a metal is in the electrochemical series, the more likely its sulphide will not dissolve in dilute acids.

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/ culled from 2018 JAMB-UTME Chemistry question 32 /

The Sulphide which is insoluble in dilute hydrochloric acid is… » QuizTablet
The Sulphide which is insoluble in dilute hydrochloric acid is… » QuizTablet

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