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Q.

Which of the following is incorrectly matched?


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a

Charcoal - Combustible

b

Straw - Combustible

c

Stone - Non-combustible

d

Glass- Combustible 

answer is D.

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Detailed Solution

Glass: Combustible is incorrectly matched.
Combustible substances are those that can catch fire or, say, the substances that undergo combustion. These substances include charcoal, straw, paper, candle, wood, cardboard, etc. Non-combustible substances are those substances that cannot catch fire. These substances include chalk, iron rod, copper coin, glass, and stone.
 
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Which of the following is incorrectly matched?