AIEEE 2008 | Ionic Equilibrium Question 98 | Chemistry

Four species are listed below
i. $$HCO_3^−$$
ii. $$H_3O^+$$
iii. $$HSO_4^−$$
iv. $$HSO_3F$$
Which one of the following is the correct sequence of their acid strength?

iv < ii < iii < I

ii < iii < i < iv

i < iii < ii < iv

iii < i < iv < ii

AIEEE 2008

MCQ (Single Correct Answer)

-1

The pK_a of a weak acid, HA, is 4.80. The pK_b of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be

9.58

4.79

7.01

9.22

AIEEE 2007

MCQ (Single Correct Answer)

-1

The first and second dissociation constants of an acid H₂A are 1.0 $$\times$$ 10⁻⁵ and 5.0 $$\times$$ 10⁻¹⁰ respectively. The overall dissociation constant of the acid will be :

5.0 $$\times$$ 10⁻⁵

5.0 $$\times$$ 10¹⁵

5.0 $$\times$$ 10⁻¹⁵

5.0 $$\times$$ 10⁵

AIEEE 2007

MCQ (Single Correct Answer)

-1

The pK_a of a weak acid (HA) is 4.5. The pOH of an aqueous buffered solution of HA in which 50% of the acid is ionized is :

7.0

4.5

2.5

9.5