(i) The given statement p is false.According to the definition of chord, it should intersect the circle at two distinct points.(ii) The given statement q is false.If the chord is not the diameter of the circle, then the centre will not bisect that chord. In other words, the centre of a circle only bisects the diameter, which is the chord of the circle.(iii) The equation of an ellipse is,a2x2​+b2y2​=1 If we put a=b=1, then we obtainx2+y2=1, which is an equation of a circleTherefore, circle is a particular case of an ellipse.Thus, statement r is true.(iv) x>y⇒−x<−y (By a rule of inequality)Thus, the given statement s is true.(v) 11 is a prime number and we know that the square root of any prime number is an irrational number. Therefore, 11​ is an irrational number.Thus, the given statement t is false.