Question:
Which of the following carbon allotropes is not correctly matched with its use?
Which of the following carbon allotropes is not correctly matched with its use?
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- Graphite \(\rightarrow\) Electrodes and lubricants
- Diamond \(\rightarrow\) Cutting and drilling tools
- Coke \(\rightarrow\) Reducing agent in metallurgy
- Activated charcoal \(\rightarrow\) Adsorbent for poisonous gases
Updated On: Jul 9, 2026
- Graphite -- as electrode in batteries
- Diamond -- as abrasive for cutting hard tools
- Coke -- as reducing agent in extraction of metals
- Carbon black -- adsorbing poisonous gases \bigskip
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The Correct Option is D
Solution and Explanation
Concept:
Different allotropes of carbon have characteristic properties and applications based on their structure.
Step 1: Analyse each option.
• Graphite is used as an electrode because it is a good conductor of electricity. \checkmark
• Diamond is used for cutting and drilling due to its exceptional hardness. \checkmark
• Coke is widely used as a reducing agent in metallurgy. \checkmark
• Adsorption of poisonous gases is a property of activated charcoal, not carbon black. Carbon black is mainly used in tyres, inks and pigments. \(\times\)
Step 2: Final conclusion. Hence, the incorrectly matched pair is \[ \boxed{\text{Carbon black -- adsorbing poisonous gases}.} \] Therefore, the correct option is \(\boxed{(D)}\).
Step 1: Analyse each option.
• Graphite is used as an electrode because it is a good conductor of electricity. \checkmark
• Diamond is used for cutting and drilling due to its exceptional hardness. \checkmark
• Coke is widely used as a reducing agent in metallurgy. \checkmark
• Adsorption of poisonous gases is a property of activated charcoal, not carbon black. Carbon black is mainly used in tyres, inks and pigments. \(\times\)
Step 2: Final conclusion. Hence, the incorrectly matched pair is \[ \boxed{\text{Carbon black -- adsorbing poisonous gases}.} \] Therefore, the correct option is \(\boxed{(D)}\).
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