If pH of `A,B,C` and D are `9.5,2.5,3.5,` and `5.5` respectively, the strongest acid is

If pH of A , B , C and D are 9.5 , 2.5 , 3.5 and 5.5 respectively, then strongest acid is

The pK_(a) value of acids A,B,C and D are 2.3,3.2,4 and 5 respectively . The strongest acid amonst them is

(a). The pH of a cold drink is 5. What will be its action on blue and red litmus solutions? (b). The pH values of three acids A, B and C having equal molar concentrations are 5.0, 2.8 and 3.5 respectively. Arrange these acids in order of the increasing acid strengths.

Three solutions P, Q and R have pH value of 3.5, · 5.2 and 12.2 respectively. Which one of these is a : Weak acid ?

A ,B and C are the points (2, 0),(5,0) and (5,3) respectively. Find coordinates of D such that ABCD is a square.