AIEEE 2008 | Ionic Equilibrium Question 129 | 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 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

AIEEE 2007

MCQ (Single Correct Answer)

-1

In a sautrated solution of the sparingly soluble strong electrolyte AgIO₃ (Molecular mass = 283) the equilibrium which sets in is
AgIO_3(s) $$\leftrightharpoons$$ Ag⁺(aq) + $$IO_3^-$$
If the solubility product constant K_sp of AgIO₃ at a given temperature is 1.0 $$\times$$10⁻⁸, what is the mass of AgIO₃ contained in 100 ml of its saturated solution?

28.3 × 10⁻² g

2.83 × 10⁻³ g

1.0 × 10⁻⁷ g

1.0 × 10⁻⁴ g

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

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