1.

The head of a matchstick contains a mixture of antimony trisulphide, potassium chlorate, starch, and some glue. For combustion, it is struck against a rough surface made of powdered glass and red phosphorus. Which of the following substances will be the first to get ignited when the match is struck against a rough surface?

A.  Antimony trisulphide   
B.  Potassium chlorate
C. amino acid composition
D.  Powdered glass
Answer» D.  Powdered glass


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