QBManager

5 RBTS PAPER

164044 An acid have pH equal to 5.3 what is the $H^{+}$ conc. for this acid :

1

5 \times 10^{- 6}

2

4 \times 10^{- 6}

3

5 \times 10^{- 5}

4

5 \times 10^{5}

Explanation:

$H^{+} = Antilog (- pH)$
$= Antilog (- 5.3)$
$= 5 \times 10^{- 6}$

NCERT-XI-196

5 RBTS PAPER

164045 $pH$ of $0.1 M$ weak acid $HA$ will be $(Ka = 4.9 \times 10^{- 8})$

1 3.15

2 4.15

3 4.5

4 4.7

Explanation:

$H^{+} = \sqrt{Ka . C} = \sqrt{4.9 \times 10^{- 8} \times 0.1} = 7 \times 10^{- 5}$
$pH = 5 - \log 7$
$= 5 - 0.85 = 4.15$

NCERT-XI-196

5 RBTS PAPER

164046 The strongest conjugate base is :

1

{NO}_{3}^{-}

2

{Cl}^{-}

3

{SO}_{4}^{2 -}

4

{CH}_{3} {COO}^{-}

Explanation:

${CH}_{3} COOH \to {CH}_{3} {COO}^{-} + H^{+}$
WA
Strong base

NCERT-XI-193

5 RBTS PAPER

164048 Which of the following show common ion effect-

1

HCl + NaCl

2

H_{2} S + HCl

3

{NH}_{4} OH + {NH}_{4} OH

4 Both 2 and 3

NCERT-XI-200

5 RBTS PAPER

164049 For the equilibrium, ${PCl}_{5} ⇌ {PCl}_{3} + {Cl}_{2}$
$K_{c} = α^{2} / (1 - α) V$ . temperature remaining constant.

1

K_{C}

will increase with the increase in volume

2

K_{C}

will increase with the decrease in volume

3

K_{C}

will not change with the change in volume

4

K_{C}

may increase or decrease with the change in volume depnding upon its numerical value

Explanation:

$K$ depends on temperature

NCERT-XI-181

5 RBTS PAPER

164044 An acid have pH equal to 5.3 what is the $H^{+}$ conc. for this acid :

1

5 \times 10^{- 6}

2

4 \times 10^{- 6}

3

5 \times 10^{- 5}

4

5 \times 10^{5}

Explanation:

$H^{+} = Antilog (- pH)$
$= Antilog (- 5.3)$
$= 5 \times 10^{- 6}$

NCERT-XI-196

5 RBTS PAPER

164045 $pH$ of $0.1 M$ weak acid $HA$ will be $(Ka = 4.9 \times 10^{- 8})$

1 3.15

2 4.15

3 4.5

4 4.7

Explanation:

$H^{+} = \sqrt{Ka . C} = \sqrt{4.9 \times 10^{- 8} \times 0.1} = 7 \times 10^{- 5}$
$pH = 5 - \log 7$
$= 5 - 0.85 = 4.15$

NCERT-XI-196

5 RBTS PAPER

164046 The strongest conjugate base is :

1

{NO}_{3}^{-}

2

{Cl}^{-}

3

{SO}_{4}^{2 -}

4

{CH}_{3} {COO}^{-}

Explanation:

${CH}_{3} COOH \to {CH}_{3} {COO}^{-} + H^{+}$
WA
Strong base

NCERT-XI-193

5 RBTS PAPER

164048 Which of the following show common ion effect-

1

HCl + NaCl

2

H_{2} S + HCl

3

{NH}_{4} OH + {NH}_{4} OH

4 Both 2 and 3

NCERT-XI-200

5 RBTS PAPER

164049 For the equilibrium, ${PCl}_{5} ⇌ {PCl}_{3} + {Cl}_{2}$
$K_{c} = α^{2} / (1 - α) V$ . temperature remaining constant.

1

K_{C}

will increase with the increase in volume

2

K_{C}

will increase with the decrease in volume

3

K_{C}

will not change with the change in volume

4

K_{C}

may increase or decrease with the change in volume depnding upon its numerical value

Explanation:

$K$ depends on temperature

NCERT-XI-181

5 RBTS PAPER

164044 An acid have pH equal to 5.3 what is the $H^{+}$ conc. for this acid :

1

5 \times 10^{- 6}

2

4 \times 10^{- 6}

3

5 \times 10^{- 5}

4

5 \times 10^{5}

Explanation:

$H^{+} = Antilog (- pH)$
$= Antilog (- 5.3)$
$= 5 \times 10^{- 6}$

NCERT-XI-196

5 RBTS PAPER

164045 $pH$ of $0.1 M$ weak acid $HA$ will be $(Ka = 4.9 \times 10^{- 8})$

1 3.15

2 4.15

3 4.5

4 4.7

Explanation:

$H^{+} = \sqrt{Ka . C} = \sqrt{4.9 \times 10^{- 8} \times 0.1} = 7 \times 10^{- 5}$
$pH = 5 - \log 7$
$= 5 - 0.85 = 4.15$

NCERT-XI-196

5 RBTS PAPER

164046 The strongest conjugate base is :

1

{NO}_{3}^{-}

2

{Cl}^{-}

3

{SO}_{4}^{2 -}

4

{CH}_{3} {COO}^{-}

Explanation:

${CH}_{3} COOH \to {CH}_{3} {COO}^{-} + H^{+}$
WA
Strong base

NCERT-XI-193

5 RBTS PAPER

164048 Which of the following show common ion effect-

1

HCl + NaCl

2

H_{2} S + HCl

3

{NH}_{4} OH + {NH}_{4} OH

4 Both 2 and 3

NCERT-XI-200

5 RBTS PAPER

164049 For the equilibrium, ${PCl}_{5} ⇌ {PCl}_{3} + {Cl}_{2}$
$K_{c} = α^{2} / (1 - α) V$ . temperature remaining constant.

1

K_{C}

will increase with the increase in volume

2

K_{C}

will increase with the decrease in volume

3

K_{C}

will not change with the change in volume

4

K_{C}

may increase or decrease with the change in volume depnding upon its numerical value

Explanation:

$K$ depends on temperature

NCERT-XI-181

5 RBTS PAPER

164044 An acid have pH equal to 5.3 what is the $H^{+}$ conc. for this acid :

1

5 \times 10^{- 6}

2

4 \times 10^{- 6}

3

5 \times 10^{- 5}

4

5 \times 10^{5}

Explanation:

$H^{+} = Antilog (- pH)$
$= Antilog (- 5.3)$
$= 5 \times 10^{- 6}$

NCERT-XI-196

5 RBTS PAPER

164045 $pH$ of $0.1 M$ weak acid $HA$ will be $(Ka = 4.9 \times 10^{- 8})$

1 3.15

2 4.15

3 4.5

4 4.7

Explanation:

$H^{+} = \sqrt{Ka . C} = \sqrt{4.9 \times 10^{- 8} \times 0.1} = 7 \times 10^{- 5}$
$pH = 5 - \log 7$
$= 5 - 0.85 = 4.15$

NCERT-XI-196

5 RBTS PAPER

164046 The strongest conjugate base is :

1

{NO}_{3}^{-}

2

{Cl}^{-}

3

{SO}_{4}^{2 -}

4

{CH}_{3} {COO}^{-}

Explanation:

${CH}_{3} COOH \to {CH}_{3} {COO}^{-} + H^{+}$
WA
Strong base

NCERT-XI-193

5 RBTS PAPER

164048 Which of the following show common ion effect-

1

HCl + NaCl

2

H_{2} S + HCl

3

{NH}_{4} OH + {NH}_{4} OH

4 Both 2 and 3

NCERT-XI-200

5 RBTS PAPER

164049 For the equilibrium, ${PCl}_{5} ⇌ {PCl}_{3} + {Cl}_{2}$
$K_{c} = α^{2} / (1 - α) V$ . temperature remaining constant.

1

K_{C}

will increase with the increase in volume

2

K_{C}

will increase with the decrease in volume

3

K_{C}

will not change with the change in volume

4

K_{C}

may increase or decrease with the change in volume depnding upon its numerical value

Explanation:

$K$ depends on temperature

NCERT-XI-181

5 RBTS PAPER

164044 An acid have pH equal to 5.3 what is the $H^{+}$ conc. for this acid :

1

5 \times 10^{- 6}

2

4 \times 10^{- 6}

3

5 \times 10^{- 5}

4

5 \times 10^{5}

Explanation:

$H^{+} = Antilog (- pH)$
$= Antilog (- 5.3)$
$= 5 \times 10^{- 6}$

NCERT-XI-196

5 RBTS PAPER

164045 $pH$ of $0.1 M$ weak acid $HA$ will be $(Ka = 4.9 \times 10^{- 8})$

1 3.15

2 4.15

3 4.5

4 4.7

Explanation:

$H^{+} = \sqrt{Ka . C} = \sqrt{4.9 \times 10^{- 8} \times 0.1} = 7 \times 10^{- 5}$
$pH = 5 - \log 7$
$= 5 - 0.85 = 4.15$

NCERT-XI-196

5 RBTS PAPER

164046 The strongest conjugate base is :

1

{NO}_{3}^{-}

2

{Cl}^{-}

3

{SO}_{4}^{2 -}

4

{CH}_{3} {COO}^{-}

Explanation:

${CH}_{3} COOH \to {CH}_{3} {COO}^{-} + H^{+}$
WA
Strong base

NCERT-XI-193

5 RBTS PAPER

164048 Which of the following show common ion effect-

1

HCl + NaCl

2

H_{2} S + HCl

3

{NH}_{4} OH + {NH}_{4} OH

4 Both 2 and 3

NCERT-XI-200

5 RBTS PAPER

164049 For the equilibrium, ${PCl}_{5} ⇌ {PCl}_{3} + {Cl}_{2}$
$K_{c} = α^{2} / (1 - α) V$ . temperature remaining constant.

1

K_{C}

will increase with the increase in volume

2

K_{C}

will increase with the decrease in volume

3

K_{C}

will not change with the change in volume

4

K_{C}

may increase or decrease with the change in volume depnding upon its numerical value

Explanation:

$K$ depends on temperature

NCERT-XI-181