Question

Some of the substances used in making of a modern safety match box are listed below:
A)- Antimony trisulphide
B)- Glass powder
C)- Potassium chlorate
D)- Red phosphorous
The head of a modern safety match stick contains:
(A)- A and D
(B)- B and C
(C)- C and D
(D)- C and A

Answer 1

Modern safety match box is a kind of match box which contains a modern safety match stick which burns out only in the specific surface of the match box only, not in other surfaces.

Complete step by step solution: In the preparation of a modern safety match box a combination of Red phosphorus with Potassium chlorate will be used.
-Here chemical formula of Potassium chlorate is ${\text{KCl}}{{\text{O}}_{\text{3}}}$, which is used as an oxidizing agent that helps in the oxidation process by providing oxygen to the substance and produces heat, smoke, etc. which is present in the head of the match stick.
-Chemical formula of red phosphorus is ${{\text{P}}_{\text{4}}}$, which is used in the match box for making the striking surface where matchsticks will strike to generate flame or smoke.
-Glass powder is also used in the making of a striking surface of a match box with red phosphorus, but in a minor quantity.

Hence, option (C) is correct.

Note: Here, some may get confused with option (B) also because glass powder is also present in the matchbox striking surface, but not in that appreciable quantity as red phosphorus is present.