Is it correct to say `AxxA={(a,a):ainA}` ? Justify your answer.

It is correct to say A xxA = {(a,a) :a in A} ? Justify your answer.

Is it right to say that sin (A+B) =sin A +sin B ? Justify your answer.

Is (i) log 2 rational or irrational? Justify your answer. (ii) log 100 rational or irrational? Justify your answer.

Hymen is not an indicator of women's virginity - Justify your answer.

STD is not panic. Prevention is in your hands. Justify your answer.

Are the positions of (5,-8) and (-8,-5) is same? Justify your answer.

Antigen - antibody reaction is a specific reaction. Justify your answer.

Can a nickel spatula be used to stir copper sulphate solution ? Justify your answer .

Does there exist a function which is continuous everywhere but not differentiable at exactly two points? Justify your answer.

Would you expect the first lonization enthalpies of two isotopes of the same element to be the same or different? Justify your answer.