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Physical chemistry
1. The solid state
2. Language of Chemistry
3. Gaseous and Liquid states
4. Stoichiometry
5. Solutions
6. Structure of Atom
7. Chemical equilibrium
8. Nuclear chemistry (Radioactivity)
9. Ionic equilibrium
10. Chemical Bonding
11. Chemical kinetics
12. Concepts of Acids, Bases and Salts
13. Surface catalysis and Colloids
14. Redox reactions
15. Chemical energetics
16. Volumetric analysis
17. Electrochemistry
18
Inorganic chemistry
18. Introduction
19. Periodic table
20. Hydrogen and its compounds
21. General aspects of Metallergy
22. Alkali metals
23. Alkaline metals
24. Boron family
25. Carbon family
26. Nitrogen family
27. Oxygen family
28. Fluorine family
29. Inert gases
30. Transition metals
31. Coordination compounds
32. Analytical chemistry
33
Organic chemistry
33. Purification and analysis of organic compounds
34. Nomenclature of Organic compounds
35. Reaction Mechanisms
36. Hydrocarbons
37. Haloalkanes (Alkyl halides)
38. Alcohol, Phenol and Ether
39. Aldehyde and Ketones
40. Carboxylic acids
41. Compounds conatining Nitrogen
42. Polymers
43. Chemistry in daily life
44
Physical chemistry
12. Concepts of Acids, Bases and Salts
Edit
1.
In the reaction, NH
3
+ H
2
O ⇋ NH
4
+
+ OH
−
, which of the following constitutes conjugate acid-base pair?
[
MOE Model
]
NH
3
and H
2
O
NH
4
+
and OH
−
H
2
O and OH
−
NH
3
and OH
−
(
c
)
H
2
O (acid) and OH
−
(its conjugate base) form a conjugate pair.
2.
According to Bronsted-Lowry concept, an acid is said to be strong if
[
MOE 2061
]
Conjugate base is strong
Conjugate base is weak
Conjugate base doesn't exist
None of above
(
b
)
Strong acids have weak conjugate bases (stable with low proton affinity).
3.
Which of the following is strongest conjugate base?
[
MOE 2052
]
NO
3
−
SO
4
2−
CH
3
COO
−
Cl
−
(
c
)
CH
3
COO
−
is the conjugate base of weak acid CH
3
COOH, making it relatively strong.
4.
Alum is
[
IOM 2001
]
Double salt
Mixed salt
Common salt
Potash salt
(
a
)
Alum (e.g., KAl(SO
4
)
2
·12H
2
O) is a double salt that dissociates completely in water.
5.
Water has pH = 7. A salt is added to it even though the pH of solution remains same. The salt is made up of
[
IOM 1999
]
Strong acid + strong base
Strong acid + weak base
Strong base + weak acid
Weak acid + weak base
(
a
)
Salts from strong acid + strong base (e.g., NaCl) don't affect pH of neutral water.
6.
In the following equilibrium: HCl + H
2
O → H
3
O
+
+ Cl
−
, H
2
O is base according to
[
IOM 2008
]
Classical concept
Arrhenius concept
Bronsted-Lowry concept
Lewis concept
(
c
)
H
2
O accepts proton (H
+
) from HCl → Bronsted-Lowry base.
