Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: Graphite is an example of tetragonal crystal system. Reason: For a tetragonal system, \[a=b\ne c,\], \[\alpha =\beta ={{90}^{o}},\gamma ={{120}^{o}}\]A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but the reason is not the correct explanation of the assertion.
C) If assertion is true statement but reason is false.
D) If both assertion and reason are false.
Correct Answer: D
Solution :
Like quartz and ice, graphite is an example of hexagonal system for this \[\alpha =\beta ={{90}^{o}}\] and \[\gamma ={{120}^{o}}\] and \[a=b\ne c.\]. For a tetragonal system \[\alpha ,\beta =\gamma ={{90}^{o}}\] and \[a=b\ne c.\] So, both the statements are false.
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