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Carbon and its Compounds — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceCarbon and its Compounds1 Mark
Question
The following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as.
  1. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  2. If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
  3. If Assertion is true, but Reason is false.
  4. If Assertion is false, but Reason is true.
Assertion Diamond does not conduct electricity.
Reason Diamond has high refractive index.
✓

Answer

If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.

A material’s ability to conduct electricity is determined by the number and mobility of its free electrons.

In diamond, each carbon atom uses all four of its valence electrons to bond with neighboring atoms. That doesn’t leave any electrons free for conducting electricity.

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