Set of Important MCQs on Acids and Bases in inorganic chemistry for the preparation of tests for chemistry and biology.
What is the pH of tears?
- 7.0
- 7.8
- 7.4
- 8.2
Question’s Answer: 7.4
Which of the mentioned concept is also called electron pair-donor acceptor system?
-
- Lewis
- Bronsted-Lowery
- Lux-Flood
- Usanovich
Question’s Answer: Lewis
Bases and reducing agents are electron-giving agents and known as ___?
- Nucleophile
- Electrophile
- Electrodative
- None of A, B, and C
Question’s Answer: Nucleophile
Lewis concept explain the formation of which bond?
- Ionic bond
- Co-ordinate bond
- Covalent bond
- Chemical bond
Question’s Answer: Co-ordinate bond
Lux-Flood concept is a donor-acceptor system of which of the following?
- Proton
- Oxide ion
- Neutron
- Electron pair
Question’s Answer: Oxide ion
Which of the mentioned is not soft acid according SHAB concept?
- Ag+
- Cu+
- K+
- Au+
Question’s Answer: K+
According to _____, “Acids are substances whose aqueous solutions turned blue litmus red and tasted sour”.
- Davy
- Liebig
- Rouelle
- Boyle
Question’s Answer: Boyle
Arrhenius concept explained ______
- Catalytic property of acid
- Quantitative determination of acid/ base strength.
- Constant heat of neutralization
- All of A, B, and C
Question’s Answer: All of A, B, and C
As said by Usanovich, a base is defined as any species ________ .
- Capable of giving up anions
- Combining with cations
- Neutralizing an acid to give a salt
- All of A, B, and C
Question’s Answer: All of A, B, and C
Which of the mentioned is not Lowery-Bronsted Base?
- HS
- H₂O
- NH3
- CI
Question’s Answer: HS
What is the pH of milk?
- 6.0
- 6.7
- 7.0
- 7.5
Question’s Answer: 6.7
Which of the mentioned concept is also called proton-donor acceptor system?
- Bronsted-Lowery
- Lewis
- Lux-Flood
- Usanovich
Question’s Answer: Bronsted-Lowery
According to SHAB, Lewis acid are divided into how many classes?
- Two classes
- Three classes
- Four classes
- None of A, B, and C
Question’s Answer: Two classes
What is the relative order of acidity of HF, HCl, HBr and HI acids?
- HCI > HBr > HI> HF
- HF > HCl > HBr > HI
- HI > HBr > HCl > HE
- HF > HI> HCl > HBr
Question’s Answer: HI > HBr > HCl > HE
What is the relative order of acidity of oxy acid?
- HCIO > HCIO2 > HCIO3 > HCIO4
- HCIO4 > HCIO3 > HCIO₂ > HCIO
- HCIO3 > HCIO2 > HCIO > HCIO4
- HCIO2 > HCIO4 > HCIO3 > HCIO
Question’s Answer: HCIO4 > HCIO3 > HCIO₂ > HCIO
What is the pH of pure water at 25°C. Kw = 1x 10-4?
- 1
- 7
- 12
- None of A, B, and C
Question’s Answer: 7
As said by SHAB concept, which of the mentioned is not hard acid?
- Cu+
- Li+
- K+
- Na+
Question’s Answer: Cu+
What is the ionic product equilibrium constant?
- Ka
- Kb
- Kc
- Kw
Question’s Answer: Kw
The value of Kw increases with temperature due to the ionization of water _______ .
- Decreases
- Remains constant
- Increases
- None of A, B, and C
Question’s Answer: Increases
According to SHAB concept, the Lewis bases were classified on the basis of which of the following?
- Charge ion size
- Polarization consideration
- Electron and coordinating ability:
- All of A, B, and C
Question’s Answer: All of A, B, and C
The one in which the acceptor atom is of low positive charge, large size and has numerous outer electrons which can be easily excited is a ________ base.
- Soft Base
- Hard Base
- Soft Acid
- Hard Acid
Question’s Answer: Soft Acid
According to ______ phenomenon, All the strong acids have very close pKa value and they seem to have nearly equal strengths in aqueous solutions.
- Leveling effect
- Debye effect
- Electrophoretic effect
- Solvent effect
Question’s Answer: Leveling effect
The concentration of OH ions in a particular household ammonia solution is 0.0025. This ammonia solution is _______ .
- Basic
- Acidic
- Neutral
- None of A, B, and C
Question’s Answer: Basic
What is the pH of the 0.1 M HCl solution?
- 0.01
- 0.1
- 0.2
- 1
Question’s Answer: 1
The pH of the 1 M HCl is
- 0
- 0.1
- 1
- 0.2
Question’s Answer: 0
The sum of pH and pOH is equal to ___ .
A 12
- 13
- 14
- 2
Question’s Answer: 14
The most convenient and has nearest approach to a universal pH measurement is
- pH strips
- pH indicator
- The emf method
- The colorimetric
Question’s Answer: The emf method
Buffer solution are used to
- Increase the pH
- Decrease the pH
- Resist the pH
- None of A, B, and C
Question’s Answer: Resist the pH
A mixture of weak acid and its salt is ________.
- Alkaline buffer
- Acidic buffer
- Neutral buffer
- All of A, B, and C
Question’s Answer: Acidic buffer
Glass electrode cannot be used to measure the pH of pure
- Acetic acid
- Ethyl alcohol
- Gelatin
- All of A, B, and C
Question’s Answer: All of A, B, and C
Which of the following have pH value of 4.2?
- Vinegar
- Lemons
- Oranges
- Tomatoes
Question’s Answer: Tomatoes
If the pH of solution is 1, What will be its pOH?
- 13
- 16
- 7
- None of A, B, and C
Question’s Answer: 13
Which of the mentioned is not true regarding buffers?
A: are made up of weak acid and its salt
- They are made up of weak base and its salt
- They tend to resist a change in pH value
- They are made up of strong acid and weak base
Question’s Answer: They are made up of strong acid and weak base
Which of the mentioned mixture does not act as buffers?
- Acetic acid/sodium acetate
- Phosphoric acid/sodium phospahte
- Sodium chloride/hydrochloric acid
- Trisbase/HCI
Question’s Answer: Sodium chloride/hydrochloric acid
What is the pH of human stomach?
- 1.5 to 2.5
- 3.0 to 8.0
- 6.0 to 7.2
- None of A, B, and C
Question’s Answer: 1.5 to 2.5
Which of the mentioned is not Lowery-Bronsted acid?
- HCI
- H₂O
- HS
- CI
Question’s Answer: CI
Which of the mentioned is not Lewis acid?
- HCI
- BF3
- AICl3
- CI
Question’s Answer: CI
Which of the mentioned is not Lewis base?
- NH3
- H₂O
- Pyridine
- BF3
Question’s Answer: BF3
Which of the mentioned is not base according to Lux-Flood concept?
- Cao
- MgO
- PbO
- SiO2
Question’s Answer: SiO2
Which of the mentioned is not acid according to Lux-Flood concept?
- CaO
B: CO2
- SO3
- SiO2
Question’s Answer: CaO
Which of the mentioned is not soft base according SHAB concept?
- F
- CN-
- H
- R
Question’s Answer: F
Which of the mentioned is not hard base according SHAB concept?
- NH3
- N2H4
- RNH2
- F
Question’s Answer: F
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