Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 6 - Ionic Equilibrium>KVPY PROBLEMS (PREVIOUS YEARS)>Q 7

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KVPY Aptitude Test - Stream SA

IMPORTANT

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Given the solubility curves of ${KNO}_{3}$ and $KCl$ , which of the following statements is not true?

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Important Questions on Ionic Equilibrium

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KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 6 - Ionic Equilibrium>KVPY PROBLEMS (PREVIOUS YEARS)>Q 11

If the

pH

of a mixture of

10 ml

of

0.1 M {NH}_{4} OH

and

10 ml

of

1 M {NH}_{4} Cl

solution is

8

, the

{pK}_{b}

value of

{NH}_{4} OH

is the closest to:

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 6 - Ionic Equilibrium>KVPY PROBLEMS (PREVIOUS YEARS)>Q 12

An aqueous solution of

HCl

has a

pH

of

2.0

. When water is added to increase the

pH

to

5.0

, the hydrogen ion concentration is:

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 6 - Ionic Equilibrium>KVPY PROBLEMS (PREVIOUS YEARS)>Q 13

The solubility product of

Mg {(OH)}_{2}

is

1.0 \times 10^{- 12}

. Concentrated aqueous

NaOH

solution is added to a

0.01 M

aqueous solution of

{MgCl}_{2}

. The

pH

at which precipitation occurs is:

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KVPY Aptitude Test - Stream SA

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 6 - Ionic Equilibrium>KVPY PROBLEMS (PREVIOUS YEARS)>Q 14

The solubility curve of ${KNO}_{3}$ in water is shown below:

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The amount of ${KNO}_{3}$ that dissolves in $50 g$ of water at $40 ° C$ is closest to:

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 6 - Ionic Equilibrium>KVPY PROBLEMS (PREVIOUS YEARS)>Q 15

An aqueous buffer is prepared by adding

100 ml

of

0.1 mol L^{- 1}

Acetic acid to

50 ml

of

0.2 mol L^{- 1}

of Sodium acetate. If

pKa

of acetic acid is

4.76

, the

pH

of the buffer is:

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KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 6 - Ionic Equilibrium>KVPY PROBLEMS (PREVIOUS YEARS)>Q 16

The

{pK}_{a}

of a weak acid is

5.85

. The concentrations of the acid and its conjugate base are equal at a

pH

of:

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KVPY Aptitude Test - Stream SA

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 6 - Ionic Equilibrium>KVPY PROBLEMS (PREVIOUS YEARS)>Q 17

The degree of dissociation of acetic acid

(0.1 mol L^{- 1})

in water (

K_{a}

of acetic acid is

10^{- 5}

) is:

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KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 6 - Ionic Equilibrium>KVPY PROBLEMS (PREVIOUS YEARS)>Q 18

The

pH

of

0.1 M

aqueous solutions of

NaCl, {CH}_{3} COONa

and

{NH}_{4} Cl

will follow the order