Question:
Which of the following substances is a bad conductor of electricity?
Which of the following substances is a bad conductor of electricity?
Updated On: June 02, 2025
- Diamond
- Gold
- Silver
- Graphite
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The Correct Option is A
Approach Solution - 1
To determine which substance is a bad conductor of electricity, we need to consider the electrical conductivity of each option:
- Diamond: Diamond is a crystal form of carbon where each carbon atom is bonded to four other carbon atoms in a rigid tetrahedral structure. This structure lacks free electrons, making diamond a poor conductor of electricity.
- Gold: Gold is a metal with high electrical conductivity due to the presence of free-moving electrons, making it an excellent conductor of electricity.
- Silver: Silver is one of the best conductors of electricity. It has a high number of free electrons, allowing electricity to pass through it very efficiently.
- Graphite: Graphite is another form of carbon but has a layered structure where each carbon atom is bonded to three others, creating a 'sheet' with delocalized electrons that can move freely. This mobility of electrons makes graphite a good conductor of electricity.
Therefore, Diamond is the substance that is a bad conductor of electricity.
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Approach Solution -2
Among the given options, Diamond is a bad conductor of electricity.
Additional Context:
- Diamond is an allotrope of carbon with a tetrahedral structure that doesn't allow free electrons.
- Good conductors in the list:
- Gold: Excellent conductor (used in high-end electronics)
- Silver: Best metallic conductor (highest electrical conductivity)
- Graphite: Conducts electricity due to delocalized electrons in its layered structure
- Key difference:
- Diamond is an electrical insulator but excellent thermal conductor
- Graphite conducts electricity despite being a non-metal
Correct Answer: (1) Diamond.
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