The enthalpies of fusion for all reactions are

Depends on the type of substance

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Negative

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Zero

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Positive

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Solution

The correct option is D
Positive

The enthalpies of fusion for all reactions are always positive because melting of a solid is an endothermic process in which heat is supplied to the reaction Hence the sum of enthalpies of the product is greater than the sum of enthalpies of the reactant.

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Which of the following is true about the charge acquired by P-type semiconductors ?

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Q. Assertion :

Δ H

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BECAUSE
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The enthalpies of fusion for all reactions are

The correct option is D Positive The enthalpies of fusion for all reactions are always positive because melting of a solid is an endothermic process in which heat is supplied to the reaction Hence the sum of enthalpies of the product is greater than the sum of enthalpies of the reactant.

The correct option is D
Positive

The enthalpies of fusion for all reactions are always positive because melting of a solid is an endothermic process in which heat is supplied to the reaction Hence the sum of enthalpies of the product is greater than the sum of enthalpies of the reactant.