Verified Solution • 2025–26 Session moderate

QAIPMT-2005-Ch-2509: NEET 2005 Chemistry - Class 11 AIPMT-2005-Ch-2509 Solution: In a face-centered cubic lattice a unit cell is shared equally…

In a face-centered cubic lattice a unit cell is shared equally by how many unit cells? 2 4 6 8

Multiple Choice Options

  • A T Δ\Delta _ S < Δ\Delta _ H and both Δ\Delta _ H and Δ\Delta _ S are +ve
  • B T Δ\Delta _ S > Δ\Delta _ H and Δ\Delta _ H is +ve and Δ\Delta _ S are −- _ ve
  • C T Δ\Delta _ S > Δ\Delta _ H and both Δ\Delta _ H and Δ\Delta _ S are +ve
  • D T Δ\Delta _ S = Δ\Delta _ H and both Δ\Delta _ H and Δ\Delta _ S are +ve

Step-by-Step Verified Solution

_ G = _ H � T _ S For spontaneous reaction, _ G has to be negative. Among the given options, it is positive only when T _ S > _ H and both _ H and _ S are +ve .

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