Multiple Choice Questions 10×1=10
1
Which acid is used in the preparation of soap?
A
Tartaric acid
B
Citric acid
C
Stearic acid
D
Oxalic acid
2
Acetic acid is used for:
A
Flavoring food
B
Making explosives
C
Etching designs
D
Cleaning metals
3
Common name of sodium hydroxide is:
A
Washing soda
B
Baking soda
C
Caustic soda
D
None of these
4
Other name of stomach acidity?
A
Hyperacidity
B
Hypoacidity
C
Both A and B
D
None of these
5
Ammonia is a base because it:
A
Ionizes in water to give OH⁻ ions
B
Contains OH group
C
Can accept proton
D
None of these
6
What is the conjugate acid of NH₃?
NH3 + H+ ⇌ NH4+
A
NH₄⁺
B
NH₂⁻
C
N₃H
D
None of these
7
What is the conjugate base of HCl?
HCl ⇌ H+ + Cl–
A
Cl⁻
B
H₂Cl⁺
C
Cl₂
D
None of these
8
Which of the following is a weak base according to the Bronsted Lowry theory?
Hint: Weak bases partially accept protons in solution
A
NaOH
B
HCl
C
NH₃
D
CH₃COOH
9
Which of the following acids is a strong acid?
Strong Bases
Strong Acids
A
Acetic acid
B
Hydrochloric acid
C
Citric acid
D
Lactic acid
10
Which physical property distinguishes strong base from weak bases?
A
pH
B
Conductivity
C
Viscosity
D
Density
Short Answer Questions 15×2=30
1
What chemical name will you give to soap as a compound?
ii
What is the difference between a strong acid and a concentrated acid? (Constructed Response Question)
iii
How does calcium metal react with dilute H₂SO₄?
Ca + H2SO4 → ?
iv
Write down difference between acids and bases.
v
Why metal oxides are bases in nature?
vi
Difference between mineral acids and natural acids?
vii
Name some compounds that contain citric acids?
viii
Define Arrhenius acid. Also give example.
ix
Define acid according to the Bronsted-Lowry theory.
x
What is difference between conjugate acid and conjugate base?
HA ⇌ H+ + A–
Acid ⇌ Proton + Conjugate Base
xi
What is meant by amphoteric compounds?
xii
What are limitations of Bronsted Lowry concept?
xiii
How salt and water is produced during a chemical reaction?
Acid + Base → Salt + Water
xiv
How do chloride ions exist in water? Exercise
xv
Give two examples of Bronsted-Lowry bases which are not bases by Arrhenius definition. Exercise
Hint: Consider substances that can accept protons but don’t produce OH⁻ ions in water