1.

Assertion: Space or crystal lattice differ in symmetry of the arrangement of points. Reason: nlambda=2d sin theta, is known as Bragg's equation.

Answer»

If both assertion and reason are TRUE and the reason is the correct EXPLANANTION of the assertion
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If the assertion and reason both are false.

Solution :Space or cyrstal lattice is a regular REPEATING arrangement of points in space and forms the BASIS of CLASSIFICATION of all structures.


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