NCERT Exemplar Chemistry - Class 11>Chapter 7 - Equilibrium>Multiple Choice Questions (Type-I)>Q 7

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The pH of neutral water at $25 ° C$ is $7.0$ . As the temperature increases, ionisation of water increases, however, the concentration of $H^{+}$ ions and ${OH}^{-}$ ions are equal. What will be the pH of pure water at $60 ° C$ ?

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Important Questions on Equilibrium

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NCERT Exemplar Chemistry - Class 11>Chapter 7 - Equilibrium>Multiple Choice Questions (Type-I)>Q 8

The ionisation constant of an acid.

K_{a}

is the measure of the strength of an acid. The

K_{a}

values of acetic acid, hypochlorous acid and formic acid are

1.74 \times 10^{- 5}, 3.0 \times 10^{- 8}

and

1.8 \times 10^{- 4}

respectively. Which of the following orders of

pH

of

0.1 mol {dm}^{- 3}

solutions of these acids is correct?

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NCERT Exemplar Chemistry - Class 11>Chapter 7 - Equilibrium>Multiple Choice Questions (Type-I)>Q 9

$K_{a_{1}}, K_{a_{2}}$ and $K_{a_{3}}$ are the respective ionisation constants for the following reactions.

$H_{2} S ⇌ H^{+} + {HS}^{-} {HS}^{-} ⇌ H^{+} + S^{2 -} H_{2} S ⇌ 2 H^{+} + S^{2 -}$

The correct relationship between $K_{a_{1}}, K_{a_{2}}$ and $K_{a_{3}}$ is

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NCERT Exemplar Chemistry - Class 11>Chapter 7 - Equilibrium>Multiple Choice Questions (Type-I)>Q 10

Acidity of

{BF}_{3}

can be explained on the basis of which of the following concepts?

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NCERT Exemplar Chemistry - Class 11>Chapter 7 - Equilibrium>Multiple Choice Questions (Type-I)>Q 11

Which of the following will produce a buffer solution when mixed in equal volumes?

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NCERT Exemplar Chemistry - Class 11>Chapter 7 - Equilibrium>Multiple Choice Questions (Type-I)>Q 12

In which of the following solvents is silver chloride most soluble?

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NCERT Exemplar Chemistry - Class 11>Chapter 7 - Equilibrium>Multiple Choice Questions (Type-I)>Q 13

What will be the value of

pH of 0.01 mol {dm}^{- 3} {CH}_{3} COOH (K_{a} = 1.74 \times 10^{- 5})

?

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NCERT Exemplar Chemistry - Class 11>Chapter 7 - Equilibrium>Multiple Choice Questions (Type-I)>Q 14

K_{a}

for

{CH}_{3} COOH is 1.8 \times 10^{- 5}

and

K_{b}

for

{NH}_{4} OH is 1.8 \times 10^{- 5}

. The

pH

of ammonium acetate will be

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NCERT Exemplar Chemistry - Class 11>Chapter 7 - Equilibrium>Multiple Choice Questions (Type-I)>Q 15

Which of the following options will be correct for the stage of half completion of the reaction

A ⇌ B

.