Statement I: An ionic solid is a good conductor of electricity :
Because
Statement II: An ionic solid is composed of positive and negative ions joined together by electrostatic forces :

Both statement 1 and statement 2 are correct and statement 2 is the correct explanation for statement 1

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Both statement 1 and statement 2 are correct but statement 2 is NOT the correct explanation for statement 1

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Statement 1 is correct but statement 2 is incorrect

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Statement 1 is incorrect but statement 2 is correct

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Both statement 1 and statement 2 are incorrect

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Solution

The correct option is D Statement 1 is incorrect but statement 2 is correct
The absence of free electrons in their structures is what generally makes ionic solids poor conductors of electricity. Although ions are electrically conductive when they are unbound, ionic solids exist in crystalline form, with each ion in a relatively fixed position surrounded by ions of the opposite charge.
So they are not good conductors of electricity in solid state.
An ionic solid is composed of positive and negative ions joined together by electrostatic forces
Assertion is wrong.
option-4.

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Statement I: An ionic solid is a good conductor of electricity :BecauseStatement II: An ionic solid is composed of positive and negative ions joined together by electrostatic forces :

Statement I: An ionic solid is a good conductor of electricity :
Because
Statement II: An ionic solid is composed of positive and negative ions joined together by electrostatic forces :