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Standard XII

Chemistry

Orbitals

Assertion :Ha...

Question

Assertion :Half-filled and fully-filled degenerate orbitals are more stable. Reason: Extra stability is due to the symmetrical distribution of electrons and exchange energy.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Extra stability is due to the symmetrical distribution of electrons and exchange energy.

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Q. Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
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Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

Assertion (A) All collision of reactant molecules lead to product formation.

Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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Assertion :Half-filled and fully-filled degenerate orbitals are more stable. Reason: Extra stability is due to the symmetrical distribution of electrons and exchange energy.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for AssertionExtra stability is due to the symmetrical distribution of electrons and exchange energy.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Extra stability is due to the symmetrical distribution of electrons and exchange energy.