Valency Quiz: Metals & Radicals for ICSE CBSE State Boards
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Mastering the valency of metals and radicals is the first step toward building a strong foundation in chemistry. This engaging and well-structured Valency Quiz is designed to make learning easy and enjoyable for ICSE, CBSE, and State Board students.
Valency questions for ICSE CBSE students
Here, students can practice multiple-choice questions (MCQs) based on the valency of common metals (like Sodium, Calcium, Aluminium, Iron) and important radicals (like Sulphate, Nitrate, Phosphate, Ammonium, Hydroxide, etc.). Each question includes a detailed explanation, ensuring that students not only check their answers but also understand the logic behind valency.
Valency of elements and radicals with answers
✨ Why this quiz is helpful:
- Covers important concepts from Classes 7 to 10
- Supports preparation for school exams, board exams, and competitive tests
- Improves concept clarity and formula writing skills
- Boosts confidence in chemistry through fun and interactive learning
Learn valency chemistry quiz for State Board
If you want to score high in chemistry, this quiz is your perfect study companion. Start practicing today and make the topic of valency simple, clear, and enjoyable!
💡 Related Resources:
Valency of Metals and Radicals Quiz – ICSE, CBSE & State Board Students
- ICSE Class 8 Previous Year Papers
- ICSE 7th to 10th Mock Tests
- ICSE Class 8 Sample Question Paper
- ICSE Class 7 Sample Question Paper
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1. What is the valency of Sodium (Na)?
A) 1
B) 2
C) 3
D) 4
Explanation: Sodium has one electron in its outermost shell, so its valency is 1.
2. What is the valency of Calcium (Ca)?
A) 1
B) 2
C) 3
D) 4
Explanation: Calcium belongs to group 2 and loses two electrons, hence valency = 2.
3. What is the valency of Aluminium (Al)?
A) 1
B) 2
C) 3
D) 4
Explanation: Aluminium belongs to group 13 and has valency 3.
4. What is the valency of Iron (Fe) in FeCl₂?
A) 2
B) 1
C) 3
D) 4
Explanation: In FeCl₂, each Cl is -1, so Fe must be +2. Valency = 2.
5. What is the valency of Iron (Fe) in FeCl₃?
A) 2
B) 3
C) 4
D) 1
Explanation: In FeCl₃, each Cl is -1, so Fe must be +3. Valency = 3.
6. What is the valency of Copper (Cu) in CuO?
A) 2
B) 1
C) 3
D) 4
Explanation: In CuO, Oxygen is -2, so Cu must be +2. Valency = 2.
7. What is the valency of Copper (Cu) in Cu₂O?
A) 1
B) 2
C) 3
D) 4
Explanation: In Cu₂O, Oxygen is -2. So 2 Cu must be +1 each. Valency = 1.
8. What is the valency of Zinc (Zn)?
A) 1
B) 2
C) 3
D) 4
Explanation: Zinc always shows valency = 2.
9. What is the valency of Magnesium (Mg)?
A) 1
B) 2
C) 3
D) 4
Explanation: Magnesium belongs to group 2, so its valency is 2.
10. What is the valency of Lead (Pb) in PbO₂?
A) 2
B) 4
C) 3
D) 1
Explanation: In PbO₂, Oxygen is -2 × 2 = -4, so Pb must be +4. Valency = 4.
11. What is the valency of Hydroxide radical (OH)?
A) 1
B) 2
C) 3
D) 4
Explanation: Hydroxide (OH⁻) has a charge of -1, so valency = 1.
12. What is the valency of Ammonium radical (NH₄)?
A) 1
B) 2
C) 3
D) 4
Explanation: Ammonium (NH₄⁺) has a charge of +1, so valency = 1.
13. What is the valency of Carbonate radical (CO₃)?
A) 1
B) 2
C) 3
D) 4
Explanation: Carbonate (CO₃²⁻) has charge -2, so valency = 2.
14. What is the valency of Sulphate radical (SO₄)?
A) 1
B) 2
C) 3
D) 4
Explanation: Sulphate (SO₄²⁻) has charge -2, so valency = 2.
15. What is the valency of Phosphate radical (PO₄)?
A) 1
B) 2
C) 3
D) 4
Explanation: Phosphate (PO₄³⁻) has charge -3, so valency = 3.
16. What is the valency of Nitrate radical (NO₃)?
A) 1
B) 2
C) 3
D) 4
Explanation: Nitrate (NO₃⁻) has charge -1, so valency = 1.
17. What is the valency of Chlorate radical (ClO₃)?
A) 1
B) 2
C) 3
D) 4
Explanation: Chlorate (ClO₃⁻) has charge -1, so valency = 1.
18. What is the valency of Dichromate radical (Cr₂O₇)?
A) 1
B) 2
C) 3
D) 4
Explanation: Dichromate (Cr₂O₇²⁻) has charge -2, so valency = 2.
19. What is the valency of Permanganate radical (MnO₄)?
A) 1
B) 2
C) 3
D) 4
Explanation: Permanganate (MnO₄⁻) has charge -1, so valency = 1.
20. What is the valency of Oxalate radical (C₂O₄)?
A) 1
B) 2
C) 3
D) 4
Explanation: Oxalate (C₂O₄²⁻) has charge -2, so valency = 2.
21. What is the valency of Silver (Ag)?
A) 1
B) 2
C) 3
D) 4
Explanation: Silver generally forms Ag⁺, so valency = 1.
22. What is the valency of Mercury (Hg) in HgCl₂?
A) 2
B) 1
C) 3
D) 4
Explanation: In HgCl₂, Cl is -1 each, so Hg is +2. Valency = 2.
23. What is the valency of Mercury (Hg) in Hg₂Cl₂?
A) 1
B) 2
C) 3
D) 4
Explanation: In Hg₂Cl₂, 2 Hg share +2, so each Hg is +1. Valency = 1.
24. What is the valency of Chloride ion (Cl⁻)?
A) 1
B) 2
C) 3
D) 4
Explanation: Chloride ion has charge -1, so valency = 1.
25. What is the valency of Oxide (O²⁻)?
A) 1
B) 2
C) 3
D) 4
Explanation: Oxygen gains 2 electrons to complete its octet, so its valency is 2.
26. What is the valency of Phosphate radical (PO₄³⁻)?
A) 1
B) 2
C) 3
D) 4
Explanation: Phosphate (PO₄³⁻) carries a charge of -3, so its valency is 3.
27. What is the valency of Iron (Fe) in Fe²⁺ (Ferrous)?
A) 2
B) 3
C) 4
D) 1
Explanation: Ferrous ion Fe²⁺ has lost 2 electrons, so valency = 2.
28. What is the valency of Iron (Fe) in Fe³⁺ (Ferric)?
A) 2
B) 3
C) 4
D) 1
Explanation: Ferric ion Fe³⁺ has lost 3 electrons, so valency = 3.
29. What is the valency of Zinc (Zn)?
A) 2
B) 1
C) 3
D) 4
Explanation: Zinc commonly forms Zn²⁺, so its valency is 2.
30. What is the valency of Chloride (Cl⁻)?
A) 1
B) 2
C) 3
D) 4
Explanation: Chlorine gains one electron to complete octet, so valency = 1.
31. What is the valency of Magnesium (Mg)?
A) 1
B) 2
C) 3
D) 4
Explanation: Magnesium (Mg²⁺) loses two electrons, so valency = 2.
32. What is the valency of Potassium (K)?
A) 1
B) 2
C) 3
D) 4
Explanation: Potassium (K) loses one electron, so its valency is 1.
33. What is the valency of Carbonate radical (CO₃²⁻)?
A) 1
B) 2
C) 3
D) 4
Explanation: Carbonate (CO₃²⁻) has a charge of -2, so its valency is 2.
34. What is the valency of Hydrogen (H)?
A) 1
B) 2
C) 3
D) 4
Explanation: Hydrogen can lose or gain one electron, so its valency is 1.
35. What is the valency of Barium (Ba)?
A) 1
B) 2
C) 3
D) 4
Explanation: Barium (Ba²⁺) belongs to group 2, so its valency is 2.
36. What is the valency of Silver (Ag)?
A) 1
B) 2
C) 3
D) 4
Explanation: Silver commonly forms Ag⁺, so its valency is 1.
37. What is the valency of Lead (Pb) in Pb²⁺?
A) 2
B) 3
C) 4
D) 1
Explanation: Pb²⁺ means lead has lost two electrons, so valency = 2.
38. What is the valency of Lead (Pb) in Pb⁴⁺?
A) 2
B) 3
C) 4
D) 1
Explanation: Pb⁴⁺ means lead has lost four electrons, so valency = 4.
39. What is the valency of Hydroxide (OH⁻)?
A) 1
B) 2
C) 3
D) 4
Explanation: Hydroxide (OH⁻) has a charge of -1, so its valency is 1.
40. What is the valency of the Ammonium radical (NH₄)?
A) 1
B) 2
C) 3
D) 4
Explanation: Ammonium ion (NH₄⁺) carries a single positive charge, so its valency is 1.
41. What is the valency of the Phosphate radical (PO₄)?
A) 1
B) 2
C) 3
D) 3
Explanation: Phosphate (PO₄³⁻) has a charge of -3, so its valency is 3.
42. What is the valency of the Hydroxide radical (OH)?
A) 1
B) 2
C) 3
D) 4
Explanation: Hydroxide (OH⁻) has a single negative charge, so its valency is 1.
43. What is the valency of the Carbonate radical (CO₃)?
A) 1
B) 2
C) 3
D) 4
Explanation: Carbonate (CO₃²⁻) has a charge of -2, so its valency is 2.
44. What is the valency of the Oxalate radical (C₂O₄)?
A) 1
B) 2
C) 3
D) 4
Explanation: Oxalate (C₂O₄²⁻) has a charge of -2, so its valency is 2.
45. What is the valency of the Sulphite radical (SO₃)?
A) 1
B) 2
C) 3
D) 4
Explanation: Sulphite (SO₃²⁻) has a charge of -2, so its valency is 2.
46. What is the valency of the Dichromate radical (Cr₂O₇)?
A) 1
B) 2
C) 3
D) 4
Explanation: Dichromate (Cr₂O₇²⁻) has a charge of -2, so its valency is 2.
47. What is the valency of the Permanganate radical (MnO₄)?
A) 1
B) 2
C) 3
D) 4
Explanation: Permanganate (MnO₄⁻) has a charge of -1, so its valency is 1.
48. What is the valency of the Chlorate radical (ClO₃)?
A) 1
B) 2
C) 3
D) 4
Explanation: Chlorate (ClO₃⁻) has a charge of -1, so its valency is 1.
49. What is the valency of the Chromate radical (CrO₄)?
A) 1
B) 2
C) 3
D) 4
Explanation: Chromate (CrO₄²⁻) has a charge of -2, so its valency is 2.
50. What is the valency of the Acetate radical (CH₃COO)?
A) 1
B) 2
C) 3
D) 4
Explanation: Acetate (CH₃COO⁻) has a charge of -1, so its valency is 1.
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