Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 134

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Which of the following options is/are true for the alkaline aqueous solution?

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Important Questions on Equilibrium

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 135

pH

of the aqueous solution of which of the following salt(s) is/are independent of its concentration?

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 136

A base type indicator is half in ionised form when

pH

is

7.2

If the ratio of unionised form to ionised form is

1 : 5

, let

pH

of the solution is

{pH}_{1}

. With the same

pH

the solution, the indicator is altered (not its type) such that the ratio of unionised form to ionised form is

1 : 4

. Let

{pH}_{2}

be the

pH

solution when

50 %

of the new indicator is in ionised form. Then:

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 137

A

2.5 g

impure sample containing weak monoacidic base (Mol. wt.

= 45 u

) is dissolved in

100 mL

water and titrated with

0.5 M

HCI

. When

{(\frac{1}{5})}^{th}

of the base was neutralised, the

pH

was found to be

9

and at equivalence point,

pH

of solution is

4.5

. Select correct statement(s):

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 146

The pair(s) of compounds which can exist together in aqueous solutions is/are?

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 147

The melting points of most of the solid substances increases with an increase of pressure acting on them. However, ice melts at a temperature lower than its usual melting point, when the pressure increases. This is because:

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 148

In which of the following reactions, is

K_{p} > K_{c}

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 149

The standard electrode potentials,

E °

of

{Fe}^{3 +} / {Fe}^{2 +}

and

{Fe}^{2 + / Fe}

at

300 K

are

+ 0.77 V

and

- 0.44 V

respectively. The

E^{o}

of

{Fe}^{3 +} / Fe

at the same temperature is

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Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 150

Which of the following relation is correct for k _f and k_b in an equilibrium process that contains equal moles of reactants and products?