Correct Answer: Option A

Explanation

Compounds that decolourize potassium permanganate (KMnO4) include unsaturated organic compounds like alkenes and alkynes, as well as reducing agents like sulphur dioxide, hydrogen sulphide, iron(II) sulfate, and sodium sulphite (Na2SO3), which readily react with the oxidizing agent KMnO4, causing a colour change from purple to colorless due to the reduction of manganese ions in the permanganate molecule. 

All the other options apart from option A are unsaturated hydrocarbons( alkenes).

• heat energy? Answer this

  2 Answers   ·   Physics   ·   1 year ago
• a ship sails 340km in direction 225⁰, then sails 570km in the direction 035⁰. how far is the final position... Answer this

  2 Answers   ·   Mathematics   ·   1 day ago
• Calculate the mass of iron (ii) sulphide required to react with dilute HCl to provide 112cm3 of H2S gas at... Answer this

  3 Answers   ·   5 years ago