1. . The bases give ______ ions in water
(A) H⁺
(B) H⁻
(C) OH⁻
(D) H3O⁺
2. . Which one is a Lewis acid?
(A) F⁻
(B) OH⁻
(C) AlCl3
(D) NH3
3. . Which one is a Lewis base?
(A) NH3
(B) H3O⁺
(C) BF3
(D) BF3
4. . The process in which base reacts with oil and forms soap is called
(A) Halogenation
(B) Saponification
(C) Neutralization
(D) Oxidation
5. . The basicity of CH3COOH is
(A) 3
(B) 2
(C) 1
(D) 4
6. . The acidity of sodium hydroxide is
(A) 4
(B) 2
(C) 1
(D) 3
7. . Which one is alkali?
(A) Ba(OH)2
(B) Cu(OH)2
(C) Al(OH)3
(D) KOH
8. . Alum is an example of
(A) Complex
(B) Acidic
(C) Double
(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 present in an acid molecule is called its
(A) Acidity
(B) Basicity
(C) Allotropy
(D) Radioactivity
13. . According to Lewis concept, an acid
(A) Accepts pair of electrons
(B) Donates pair of electrons
(C) Accepts pair of protons
(D) Donates pair of protons
14. . KH2PO4 is ______ salt
(A) Acidic
(B) Basic
(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 the crystal of copper sulphate (CuSO4·xH2O)
(A) 5
(B) 6
(C) 12
(D) 7
17. . The nature of solution having pH more than seven will be
(A) Neutral
(B) Acidic
(C) Basic
(D) Amphoteric
18. . Which one is a double salt?
(A) CuSO4·5H2O
(B) Na2CO3·10H2O
(C) K2SO4·Al2(SO4)3
(D) Na2SO4
19. . What will be the effect of mixing more water in acidic solution
(A) pH will remain constant
(B) pH will decrease
(C) pH will increase
(D) pH will become 14
20. . Which one has slippery touch?
(A) Acid
(B) Double salt
(C) Salt
(D) Base