1. The bases give ______ ions in water
(A) H⁺
(B) H⁻
(C) OH⁻
(D) H₃O⁺
2. Which one is a Lewis acid?
(A) AlCl₃
(B) OH⁻
(C) NH₃
(D) F⁻
3. Which one is a Lewis base?
(A) BF₃
(B) H₃O⁺
(C) NH₃
(D) AlCl₃
4. The process in which base reacts with oil and forms soap is called ______
(A) Halogenation
(B) Oxidation
(C) Neutralization
(D) Saponification
5. The basicity of CH₃COOH is
(A) 1
(B) 2
(C) 3
(D) 4
6. The acidity of sodium hydroxide is
(A) 4
(B) 2
(C) 3
(D) 1
7. Which one is alkali?
(A) Cu(OH)₂
(B) KOH
(C) Al(OH)₃
(D) Ba(OH)₂
8. Alum is an example of
(A) Double
(B) Complex
(C) Acidic
(D) Basic
9. The pH of pure water is
(A) 4
(B) 0
(C) 7
(D) 14
10. The solution having pH six is called
(A) Strong acid
(B) Strong base
(C) Weak acid
(D) Weak base
11. pH is equal to
(A) −log[H⁺]
(B) −log[OH⁻]
(C) +log[H⁺]
(D) +log[OH⁻]
12. The number of ionizable hydrogen atoms in an acid molecule is called its
(A) Acidity
(B) Allotropy
(C) Basicity
(D) Radioactivity
13. According to Lewis concept, an acid
(A) Accept pair of electrons
(B) Donate pair of electrons
(C) Accept proton
(D) Donate proton
14. KH₂PO₄ is a ______ salt
(A) Basic
(B) Acidic
(C) Neutral
(D) Double
15. The pH range of a basic solution is
(A) 1 to 4
(B) 8 to 14
(C) 0 to 7
(D) 5 to 6
16. How many water molecules are in CuSO₄ crystal
(A) 12
(B) 5
(C) 6
(D) 7
17. The nature of solution having pH more than 7 will be
(A) Neutral
(B) Basic
(C) Acidic
(D) Amphoteric
18. Which one is a double salt?
(A) CuSO₄·5H₂O
(B) Na₂CO₃·10H₂O
(C) Na₂SO₄
(D) K₂SO₄·Al₂(SO₄)₃
19. Effect of mixing more water in acidic solution
(A) pH will increase
(B) pH will decrease
(C) pH will remain constant
(D) pH will become 14
20. Which one has slippery touch?
(A) Acid
(B) Salt
(C) Base
(D) Double salt