Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 2>Q 14

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Earn 100

The ${pK}_{a}$ of acetic acid is $4.74$ , which implies that:

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Important Questions on Equilibrium

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 2>Q 15

Equal volumes of

0.1 . M

aniline solution

(K_{b} = 10^{- 10})

are mixed with

0.1 M {NH}_{3}

the solution

(K_{b} = 10^{- 6})

. Then, which of the following is correct?

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 2>Q 16

The dissociation constants of two acids

{H A}_{1}

and

{H A}_{2}

are

3.0 \times 10^{- 4}

and

1.8 \times 10^{- 5}

respectively. The relative strengths of the acids will be approximately

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 2>Q 17

The

K_{a}

of monobasic acid

A, B

and

C

are

10^{- 6}, 10^{- 8}

and

10^{- 10}

, respectively. The concentrations of

A, B

and

C

are, respectively.

0.1 M, 0.01 M

and

0.001 M

. Which of the following is correct for

pOH

of

A, B & C

?

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 2>Q 18

A diprotic, Carbonic acid has following the $K_{a}$ values.

$\begin{array}{l} H_{2} {CO}_{3} + H_{2} O ⇌ {HCO}_{3}^{-} + H_{3} O^{+}, & K_{a 1} = 4.3 \times 10^{- 7} \\ {HCO}_{3}^{-} + H_{2} O ⇌ {CO}_{3}^{- 2} + H_{3} O^{+}, & K_{a 2} = 4.8 \times 10^{- 11} \end{array}$

What is the concentration of carbonate ion in saturated solution of $H_{2} {CO}_{3}$ that is $0.037 M$ ?

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 2>Q 19

How many of the following are acidic salts?

${Na}_{2} {SO}_{4} Ca (OH) Cl$ $Pb (OH) Cl$ ${NaHSO}_{4}$

${NaHSO}_{3} {Na}_{2} {SO}_{3}$ ${Na}_{2} S BiOCl$ ${NaH}_{2} {PO}_{4}$

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 2>Q 20

The salt of which of the following four weak acids will be most hydrolysed?

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 2>Q 21

The

p H

of 0.1 M solution of the following salts increases in an order -

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Alpha Question Bank for Medical: Chemistry>Chapter 5 - Equilibrium>Exercise 2>Q 22

%

hydrolysis of

0.1 M {CH}_{3} {COONH}_{4},

when

K_{a} = K_{b} = 1.8 \times 10^{- 5}

is: