Verified Solution • 2025–26 Session moderate

QAIPMT-2007-Ph-2376: NEET 2007 Physics - Class 12 AIPMT-2007-Ph-2376 Solution: For a cubic crystal structure which one of the following…

For a cubic crystal structure which one of the following relations indicating the cell characteristics is correct? a≠b≠ca \neq b \neq c and α=β=γ=90∘\alpha = \beta = \gamma = 90^\circ a = b = c and α≠β≠γ=90∘\alpha \neq \beta \neq \gamma = 90^\circ a = b = c and α=β=γ=90∘\alpha = \beta = \gamma = 90^\circ a≠b≠ca \neq b \neq c and α=β=γ=90∘\alpha = \beta = \gamma = 90^\circ

Multiple Choice Options

  • A B.E. = [ZM p + (A −- _ Z)M n −- _ M(A, Z)]c 2
  • B B.E. = [ZM p + AM p −- _ M(A, Z)]c 2
  • C B.E. = M(A, Z) −- _ ZM p −- _ (A −- _ Z)M n
  • D B.E. = [M(A, Z) −- _ ZM p −- _ (A −- _ Z)M n ]c 2

Step-by-Step Verified Solution

The difference in mass of a nucleus and its constituents, _ M, is called the mass defect and is given by _ M = [ZM p + (A _ Z)M n ] - M(A, Z) binding energy = _ Mc 2 = [ZM p + (A _ Z)M n _ M(A, Z)]c 2

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