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Which of the following gases may not be dried with concentrated sulphuric acid

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Which of the following gases may not be dried with concentrated sulphuric acid?

A. HCl

B. NH₃

C. Cl₂

D. SO₂

QUICK ANSWER…

B

SOLUTION…  

Quick lime (CaO) is the right drying agent often used to dry ammonia and not concentrated sulphuric acid, this is because ammonia readily reacts with the acid to form ammonium sulphate.

Which of the following gases may not be dried with concentrated sulphuric acid?

Now for the right answer to the above question:

  1. Option A is incorrect. HCl gas can be effectively dried by conc sulfuric acid.
  2. Option B is correct. Quick lime instead is used.
  3. C is incorrect. chlorine gas can effectively be dried using the acid.
  4. D is not the correct answer. Sulfur (iv) oxide can also be effectively dried using concentrated sulfuric acid.

QUICK TIPS…

You may please note these/this:

  • Conc sulphuric acid and calcium chloride are both good drying agents, but they are not used to dry ammonia because a reaction is bound to occur.

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/ culled from 2018 JAMB-UTME Chemistry question 39 /

Which of the following gases may not be dried with concentrated sulphuric acid » QuizTablet
Which of the following gases may not be dried with concentrated sulphuric acid » QuizTablet

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