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 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):

Volume of HCl is used at equivalent point is 100 mL .

K b of base is less than 10 - 6

Weight percentage of a base in given sample is 80 % .

The exothermic formation of ClF 3 is represented by the following equation: Cl 2 g + 3 F 2 g ⇌ 2 ClF 3 g ; ΔH = - 329 kJ Which of the following will increase the quantity of ClF 3 in the equilibrium mixture of Cl 2 , F 2 and ClF 3 ?

Increasing the volume of the container.

MEDIUM

JEE Main/Advance

IMPORTANT

Earn 100

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

50% studentsanswered this correctly

Important Questions on Equilibrium

HARD

JEE Main/Advance

IMPORTANT

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

A base type indicator is half in ionised form when

pH

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:

HARD

JEE Main/Advance

IMPORTANT

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

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):

MEDIUM

JEE Main/Advance

IMPORTANT

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?

EASY

JEE Main/Advance

IMPORTANT

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:

MEDIUM

JEE Main/Advance

IMPORTANT

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

In which of the following reactions, is

K_{p} > K_{c}

EASY

JEE Main/Advance

IMPORTANT

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

The standard electrode potentials,

E °

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

and

{Fe}^{2 + / Fe}

300 K

are

+ 0.77 V

and

- 0.44 V

respectively. The

E^{o}

{Fe}^{3 +} / Fe

at the same temperature is

EASY

JEE Main/Advance

IMPORTANT

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?

MEDIUM

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 5 - Equilibrium>Exercise-4>Q 152

An unknown substance

(P)

functions as weak base in water. It produces silver mirror test. It reacts with dilute

HCl

to produce

(Q)

which turns blue litmus red.

(P)

may be:

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

Important Questions on Equilibrium

Learn and Prepare for any exam you want !

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