Multiple choice

Which out of the following chemical substances are the components of a matchstick head? (I) Antimony trisulphide (II) Potassium Chlorate (III) Red Phosphorus
(IV) Powdered glass

  1. (III) and (IV)

  2. (II) and (III)

  3. (I), (II). (III) and (IV)

  4. (I) and (IV)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Safety match heads contain antimony trisulfide (the fuel), potassium chlorate (the oxidizing agent), and powdered glass (abrasive). The striking surface contains red phosphorus. When the match is struck, friction generates heat, the red phosphorus converts to white phosphorus, which ignites the potassium chlorate, starting the combustion of antimony trisulfide.

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