Here are the 45 multiple-choice questions (MCQs) on the topic of Chemical Reactivity, along with the correct answers listed in bullet format at the end.
Easy MCQs
1. Which of the following is a metal?
a) Helium
b) Iron
c) Oxygen
d) Carbon
2. What is the physical state of most metals at room temperature?
a) Solid
b) Liquid
c) Gas
d) Plasma
3.Which property is commonly associated with metals?
a) Brittle
b) Conductive
c) Dull
d) Insulating
4.Which of the following metals is known for its high malleability?
a) Iron
b) Gold
c) Mercury
d) Sodium
5. What characterizes the electropositive nature of metals?
a) Ability to gain electrons
b) Ability to lose electrons
c) Forming covalent bonds
d) Low melting points
6. Which trend is observed as you move down a group in the periodic table?
a) Decrease in electropositivity
b) Increase in electropositivity
c) No change in electropositivity
d) Increase in ionization energy
7. What happens to the ionization energy as you go down the alkali metals group?
a) Increases
b) Decreases
c) Remains constant
d) Fluctuates
8. Which of the following is a property of alkali metals?
a) They are very unreactive
b) They float on water
c) They react vigorously with water
d) They are used in fireworks
9. What is the primary use of sodium in industry?
a) Light bulbs
b) Salt production
c) Electronics
d) Construction
10. Which metal is used in aircraft construction due to its lightweight and strength?
a) Iron
b) Magnesium
c) Lead
d) Platinum
Moderate MCQs
11. What is a common property of noble metals like gold and platinum?
a) High reactivity
b) Corrosion resistance
c) Low melting points
d) High density
12. Which of the following metals is the most electropositive?
a) Calcium
b) Potassium
c) Magnesium
d) Sodium
13. What is a notable characteristic of non-metals?
a) They are typically good conductors of heat
b) They are malleable and ductile
c) They tend to gain electrons in reactions
d) They are usually shiny
14. Which non-metal is essential for life and found in DNA?
a) Nitrogen
b) Oxygen
c) Sulfur
d) Phosphorus
15. How do non-metals generally react with hydrogen?
a) Form metal hydrides
b) Form non-metal hydrides
c) Do not react
d) React to form salts
16. What happens when sodium reacts with water?
a) No reaction
b) Produces hydrogen gas and sodium hydroxide
c) Forms sodium oxide
d) Forms sodium chloride
17. Which non-metal reacts with water to produce sulfuric acid?
a) Nitrogen
b) Phosphorus
c) Sulfur
d) Carbon
18. What is a common use of calcium in construction?
a) Steel reinforcement
b) Paint production
c) Fertilizers
d) Cement production
19. What is the significance of non-metals in biological processes?
a) They are not involved
b) They play critical roles in respiration and photosynthesis
c) They are mainly used for structural support
d) They are only present in trace amounts
20. Which non-metal is known for its inertness and is used in jewelry?
a) Silver
b) Gold
c) Platinum
d) Copper
Difficult MCQs
21. What determines the reactivity of alkali and alkaline earth metals?
a) Their atomic number
b) Their electronegativity
c) Their ionization energy
d) Their atomic radius
22. Which statement is true regarding the chemical properties of non-metals?
a) They readily lose electrons
b) They typically form anions in reactions
c) They have high melting and boiling points
d) They are not involved in oxidation-reduction reactions
23. What reaction occurs when methane is burned in the presence of oxygen?
a) It produces carbon dioxide and water
b) It produces carbon monoxide and hydrogen
c) It produces only carbon and water
d) It produces methane and oxygen
24. Which of the following noble metals is the least reactive?
a) Silver
b) Gold
c) Platinum
d) Palladium
25. What is a characteristic feature of noble gases?
a) High reactivity
b) They do not form compounds easily
c) They have high boiling points
d) They are solids at room temperature
26. Which of the following metals shows the highest ionization energy?
a) Sodium
b) Magnesium
c) Potassium
d) Calcium
27. Which non-metal is used in fertilizers and is a component of nucleic acids?
a) Carbon
b) Nitrogen
c) Sulfur
d) Phosphorus
28. How does the reactivity of alkaline earth metals compare to alkali metals?
a) Alkaline earth metals are less reactive than alkali metals
b) Alkaline earth metals are more reactive than alkali metals
c) Both have similar reactivity
d) Their reactivity is not comparable
29. Which noble metal is known for its excellent electrical conductivity?
a) Gold
b) Silver
c) Platinum
d) Rhodium
30. What type of bond is typically formed between non-metals?
a) Ionic bond
b) Metallic bond
c) Covalent bond
d) Hydrogen bond
31. What happens during the reaction of magnesium with hydrochloric acid?
a) No reaction
b) Produces hydrogen gas
c) Produces magnesium hydroxide
d) Produces magnesium chloride and hydrogen
32. Which of the following non-metals can react with sodium hydroxide?
a) Nitrogen
b) Carbon
c) Sulfur
d) Phosphorus
33. What characterizes the inertness of noble metals?
a) High reactivity
b) Low ionization energy
c) Strong metallic bonds
d) Lack of tendency to form compounds
34. Which property makes silver suitable for use in photography?
a) High melting point
b) Sensitivity to light
c) High electrical conductivity
d) Corrosion resistance
35. Which metal is known for its role in the formation of alloys?
a) Calcium
b) Silver
c) Gold
d) Iron
36. What is the role of non-metals in the synthesis of organic compounds?
a) They provide structural support
b) They are catalysts
c) They serve as reactants and functional groups
d) They have no role
37. Which of the following describes the trend of reactivity among alkali metals?
a) Increases down the group
b) Decreases down the group
c) Remains constant
d) Fluctuates randomly
38. Which of the following metals is not considered a transition metal?
a) Iron
b) Copper
c) Zinc
d) Sodium
39. What type of reaction occurs when non-metals react with metals?
a) Decomposition reaction
b) Combination reaction
c) Displacement reaction
d) Oxidation-reduction reaction
40. What property distinguishes non-metals from metals in terms of conductivity?
a) Non-metals are generally poor conductors of electricity
b) Non-metals are good conductors of electricity
c) Non-metals conduct heat better than metals
d) Non-metals have high thermal conductivity
41. Which of the following elements is a non-metal?
a) Aluminium
b) Silicon
c) Carbon
d) Iron
42. Which property of noble metals makes them useful in electronics?
a) High thermal resistance
b) High reactivity
c) Excellent conductivity
d) Ductility
43. What occurs during the reaction of calcium with water?
a) Forms calcium oxide
b) Forms calcium hydroxide and hydrogen
c) Forms calcium chloride
d) No reaction occurs
44. What is the significance of non-metals in the environment?
a) They are primarily pollutants
b) They are essential for plant growth
c) They contribute to soil erosion
d) They have no significance
Correct Answers
- 1. b
- 2. a
- 3. b
- 4. b
- 5. b
- 6. b
- 7. b
- 8. c
- 9. b
- 10. b
- 11. b
- 12. b
- 13. c
- 14. d
- 15. b
- 16. b
- 17. c
- 18. d
- 19. b
- 20. c
- 21. c
- 22. b
- 23. a
- 24. b
- 25. b
- 26. a
- 27. b
- 28. a
- 29. b
- 30. c
- 31. d
- 32. c
- 33. d
- 34. b
- 35. d
- 36. c
- 37. a
- 38. d
- 39. d
- 40. a
- 41. c
- 42. c
- 43. b
- 44. b
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