Multiple choice

Which one of the following compounds is used as a sedative?

  1. potassium bromide

  2. calcium chloride

  3. ethyl alcohol

  4. phosphorous trichloride
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A Correct answer
Explanation

Potassium bromide is a sedative because bromide ions (Br-) have a calming effect on the central nervous system. Historically, bromide salts were widely used as sedatives and anticonvulsants. Calcium chloride is used in de-icing and as a calcium supplement. Ethyl alcohol is a depressant but not classified as a sedative drug. Phosphorus trichloride is a reactive chemical used in synthesis.

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