Which of the following substances is non-combustible?

Wood

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Biogas

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Kerosene oil

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A piece of stone

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Solution

The correct option is D A piece of stone
A piece of stone is non-combustible. A substance is defined as non-combustible if it does not react with oxygen to produce heat. A piece of stone does not react with oxygen.

The correct answer is D

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Similar questions

(a) What are combustible substances ? Name three combustible substances.

(b) What are non-combustible substances ? Name three non-combustible substances.

\begin{matrix} Combustible & Non-combustible Wood & Glass Paper & Charcoal Kerosene & Stone \end{matrix}

\begin{matrix} Combustible & Non-combustible Coal & Glass Paper & Cow dung cake Hydrogen & Chalk \end{matrix}

\begin{matrix} Combustible & Non-combustible Wood & Glass Paper & Charcoal Kerosene & Stone \end{matrix}

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