Acid-Base Theories MCQs with Answers

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Welcome to the Acid-Base Theories MCQs with Answers, it helps learners quickly identify areas for improvement in Acid-Base Theories Online Test.

Acid-base theories form the foundation of understanding chemical reactions involving acids and bases. In an acid-base theories quiz, MCQs (multiple choice questions) cover key concepts from different perspectives:

The Arrhenius theory MCQs focus on how acids dissociate to produce hydrogen ions (H+) in aqueous solutions and bases produce hydroxide ions (OH-).

Bronsted-Lowry theory MCQs expand this by defining acids as proton donors and bases as proton acceptors, broadening the scope beyond aqueous solutions to include non-aqueous systems.

Lewis theory exam questions explore acids as electron pair acceptors and bases as electron pair donors, emphasizing electron transfer in reactions.

Acid-base titrations MCQs assess skills in calculating concentrations of acids and bases involved in neutralization reactions, crucial in analytical chemistry and quantitative analysis.

Acid-Base Theories Online Quiz

By presenting 3 options to choose from, Acid-Base Theories Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Acid-Base Theories Questions and Answers and click over the correct answer.

Test Name: Acid-Base Theories MCQ Quiz Practice
Type: Quiz Test
Total Questions: 40
Total Marks: 40
Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quiz, simply click on question and comment below that question, so that we can update the answer in the quiz section.

Acid-Base Theories Quiz

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1 / 40

According to Lewis theory, a base is

a proton acceptor

an electron pair donor

an electron pair acceptor

2 / 40

An example of a Lewis base is

NH3

HCl

H2O

3 / 40

According to Arrhenius theory, an acid produces

OH- ions in solution

H2 gas in solution

H+ ions in solution

4 / 40

The ionization constant of water (Kw) at 25°C is

1 x 10^-10

1 x 10^-14

1 x 10^-7

5 / 40

The strength of a base depends on its ability to

accept protons

donate protons

accept electrons

6 / 40

According to Bronsted-Lowry theory, an acid is a

proton acceptor

proton donor

electron donor

7 / 40

The conjugate acid of H2O is

H3O+

OH-

H2O2

8 / 40

A strong base completely

dissociates in water

partially dissociates in water

does not dissociate in water

9 / 40

The pOH of a solution is a measure of

the neutralization capacity

H+ ion concentration

OH- ion concentration

10 / 40

In the reaction HCl + H2O → H3O+ + Cl-, H2O acts as a

Bronsted-Lowry base

Bronsted-Lowry acid

Lewis base

11 / 40

The conjugate acid of NH3 is

NH4+

NH2-

NH4OH

12 / 40

In the reaction NH3 + H2O → NH4+ + OH-, NH3 acts as a

Lewis acid

Bronsted-Lowry base

Bronsted-Lowry acid

13 / 40

In the reaction NH3 + BF3 → NH3BF3, NH3 acts as a

Lewis base

Bronsted-Lowry acid

Lewis acid

14 / 40

The formula for calculating pH is

-log[OH-]

-log[H+]

log[H+]

15 / 40

A weak acid

partially dissociates in water

does not dissociate in water

completely dissociates in water

16 / 40

In the reaction NH3 + BF3 → NH3BF3, BF3 acts as a

Lewis base

Bronsted-Lowry base

Lewis acid

17 / 40

According to Bronsted-Lowry theory, a base is a

proton donor

proton acceptor

electron acceptor

18 / 40

The self-ionization of water produces

H3O+ and OH- ions

H+ and OH- ions

H2 and O2 gases

19 / 40

The Lewis theory focuses on the transfer of

electron pairs

neutrons

protons

20 / 40

A substance that can donate more than one proton per molecule is called a

polyprotic acid

monoprotic acid

amphoteric substance

21 / 40

An example of a Lewis acid is

AlCl3

NH3

OH-

22 / 40

The conjugate base of H2SO4 is

SO4^2-

HSO4-

H2SO3

23 / 40

Water can act as both an acid and a base, making it

acidic

neutral

amphoteric

24 / 40

In the reaction H2O + H2O → H3O+ + OH-, water acts as

only an acid

both an acid and a base

only a base

25 / 40

A substance that can act as both an acid and a base is called

amphiprotic

neutral

acidic

26 / 40

A strong acid completely

dissociates in water

does not dissociate in water

partially dissociates in water

27 / 40

A solution with a pH of 2 is

strongly basic

neutral

strongly acidic

28 / 40

A substance that can accept more than one proton per molecule is called a

amphoteric substance

polybasic base

monobasic base

29 / 40

A solution with a pH of 12 is

strongly acidic

strongly basic

neutral

30 / 40

An acid with a pKa of 3 is

equal in strength to an acid with a pKa of 5

stronger than an acid with a pKa of 5

weaker than an acid with a pKa of 5

31 / 40

The pH and pOH of a neutral solution at 25°C are both

32 / 40

The pH of a solution is a measure of

OH- ion concentration

H+ ion concentration

the neutralization capacity

33 / 40

According to Arrhenius theory, a base produces

H+ ions in solution

CO2 in solution

OH- ions in solution

34 / 40

The relationship between pH and pOH in a solution at 25°C is

pH + pOH = 10

pH + pOH = 7

pH + pOH = 14

35 / 40

The strength of an acid depends on its ability to

accept protons

donate electrons

donate protons

36 / 40

The formula for calculating pOH is

log[OH-]

-log[H+]

-log[OH-]

37 / 40

The Bronsted-Lowry theory focuses on the transfer of

protons

electrons

neutron pairs

38 / 40

According to Lewis theory, an acid is

a proton donor

an electron pair donor

an electron pair acceptor

39 / 40

A weak base

partially dissociates in water

does not dissociate in water

completely dissociates in water

40 / 40

The conjugate base of HCl is

H2O

H+

Cl-

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Acid-Base Theories Flashcards

According to Arrhenius theory, an acid produces

H+ ions in solution

According to Arrhenius theory, a base produces

OH- ions in solution

According to Bronsted-Lowry theory, an acid is a

proton donor

According to Bronsted-Lowry theory, a base is a

proton acceptor

The conjugate base of HCl is

Cl-

The conjugate acid of NH3 is

NH4+

According to Lewis theory, an acid is

an electron pair acceptor

According to Lewis theory, a base is

an electron pair donor

Water can act as both an acid and a base, making it

amphoteric

In the reaction NH3 + H2O → NH4+ + OH-, NH3 acts as a

Bronsted-Lowry base

In the reaction HCl + H2O → H3O+ + Cl-, H2O acts as a

Bronsted-Lowry base

A substance that can donate more than one proton per molecule is called a

polyprotic acid

A substance that can accept more than one proton per molecule is called a

polybasic base

The strength of an acid depends on its ability to

donate protons

The strength of a base depends on its ability to

accept protons

The ionization constant of water (Kw) at 25°C is

1 x 10^-14

In the reaction NH3 + BF3 → NH3BF3, BF3 acts as a

Lewis acid

In the reaction NH3 + BF3 → NH3BF3, NH3 acts as a

Lewis base

The pH of a solution is a measure of

H+ ion concentration

The pOH of a solution is a measure of

OH- ion concentration

A strong acid completely

dissociates in water

A weak acid

partially dissociates in water

A strong base completely

dissociates in water

A weak base

partially dissociates in water

The conjugate base of H2SO4 is

HSO4-

The conjugate acid of H2O is

H3O+

The Bronsted-Lowry theory focuses on the transfer of

protons

The Lewis theory focuses on the transfer of

electron pairs

The formula for calculating pH is

-log[H+]

The formula for calculating pOH is

-log[OH-]

A solution with a pH of 2 is

strongly acidic

A solution with a pH of 12 is

strongly basic

An example of a Lewis acid is

AlCl3

An example of a Lewis base is

NH3

A substance that can act as both an acid and a base is called

amphiprotic

The self-ionization of water produces

H3O+ and OH- ions

The pH and pOH of a neutral solution at 25°C are both

An acid with a pKa of 3 is

stronger than an acid with a pKa of 5

The relationship between pH and pOH in a solution at 25°C is

pH + pOH = 14

In the reaction H2O + H2O → H3O+ + OH-, water acts as

both an acid and a base

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AdminMay 28, 2024

0 28 1 minute read