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Test: Acid-Base Equilibrium - JEE MCQ


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10 Questions MCQ Test - Test: Acid-Base Equilibrium

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Test: Acid-Base Equilibrium - Question 1

Statement A : pH of buffer increases with increasing temperature.
Statement B : The value of KW of water decreases with decreasing temperature.

Detailed Solution for Test: Acid-Base Equilibrium - Question 1

Dissociation of electrolytes increases with increase in temperature: So, also increases.
∴ pH of the buffer solution decreases.

Test: Acid-Base Equilibrium - Question 2

The number of species of the following that can act both as Bronsted acids and bases is ,

Detailed Solution for Test: Acid-Base Equilibrium - Question 2

(i) (Bronsted acid)
(ii) (Bronsted base)
(iii) (Bronsted base)
(iv) (Bronsted acid)

(vii) (Bronsted base)
(viii) (Bronsted acid)
(ix) (Bronsted base)
Hence, and (two species act as acid as well as base).

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Test: Acid-Base Equilibrium - Question 3

of is added to of barium hydroxide solution. What is the of the resulting solution?

Detailed Solution for Test: Acid-Base Equilibrium - Question 3

In water, barium hydroxide is hydrolysed as follows.

pH + pOH = 14
pH = 14−pOH
= 14−2.69
= 11.3
≈ 11.0

Test: Acid-Base Equilibrium - Question 4

Which equilibrium can be described as an acidbase reaction using the Lewis acid-base definition but not using the Bronsted-Lowry definition?

Detailed Solution for Test: Acid-Base Equilibrium - Question 4


According to Bronsted-Lowry concept of acids and bases, an acid is a substance which can give a proton and a base is a substance which accepts a proton.
According to Lewis concept of acids and bases, an acid is a substance which can accept a lone pair of electrons whereas a base is a substance which can donate a lone pair of electrons.
involves loss and gain of electrons.
is coordinated to by donating electrons (LHS). It is then removed by withdrawing electrons.

Test: Acid-Base Equilibrium - Question 5

What is the decreasing order of basic strengths of  and

Detailed Solution for Test: Acid-Base Equilibrium - Question 5

Follow Lowry Bronsted concept for conjugate pair. Acid strength follows the order conjugate base will follow the order

Test: Acid-Base Equilibrium - Question 6

Values of dissociation constant, are given as follows:

Correct order of increasing base strength of the base and will be:

Detailed Solution for Test: Acid-Base Equilibrium - Question 6

Higher the value of lower will be the value of i.e. higher will be the acidic nature. Further and are conjugate base of the acids and respectively hence the correct order of base strength will be

(∵ stronger the acid weaker will be its conjugate base)

Test: Acid-Base Equilibrium - Question 7

Given
(i)

(ii)

These equilibria show the following order of the relative base strength,

Detailed Solution for Test: Acid-Base Equilibrium - Question 7

The more is the value of equilibrium constant, the more is the completion of reaction or more is the concentration of products i.e. the order of relative strength would be

Test: Acid-Base Equilibrium - Question 8

The degree of dissociation of weak acid HA is . If of solution is diluted to the degree of dissociation of acid and ion concentration in the resulting solution will be respectively

Detailed Solution for Test: Acid-Base Equilibrium - Question 8


Molarity of diluted solution;


Test: Acid-Base Equilibrium - Question 9
Acidity of can be explained on the basis of which of the following concepts?
Detailed Solution for Test: Acid-Base Equilibrium - Question 9
is is electron deficient i.e, lone-pair of electrons acceptor (Lewis acid), because in , is hybridised and it does not satisfy octet ( has say bonded electrons).

Test: Acid-Base Equilibrium - Question 10

The hydrogen ion concentration of which is dissociated is

Detailed Solution for Test: Acid-Base Equilibrium - Question 10


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