State in each case, whether the given statement is true or false.
(i) The sum of two rational numbers is rational.
(ii) The sum of two irrational numbers is irrational.
(iii) The product of two rational numbers is rational.
(iv) The product of two irrational numbers is irrational.
(v)The sum of a rational number and an irrational number is irrational.
(vi) The product of a nonzero rational number and an irrational number is a rational number.
(vii)Every real number is rational.
(viii) Every real number is either rational or irrational.
(ix) 
is irrational and 
is rational.
(i) True: = 
always a rational number.
(ii) False: = 
, which is a rational number.
(iii) True: =
always a rational number.
(iv) False: = 
which is a rational number.
(v) True : = 
, is always irrational.
(vi) False: = 
is always an irrational number.
(vii) False : As rational numbers are on number line and all numbers on number line is real. Hence, every rational number is also Real.
(viii) True: As both rational and irrational numbers can be presented at number line are real. Hence they may be rational or irrational.
(ix) True: π = 3.141592653…… non terminating decimal form and 
is a fractional form.