Đại cương về Kim loại Practice Questions
THPT (Vietnam) · THPT Hóa học · 146 free MCQs with instant results and detailed explanations.
146
Total
43
Easy
75
Medium
28
Hard
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Sample Questions from Đại cương về Kim loại
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Q1
Easy
Which of the following metals is known for its high resistance to corrosion?
A.
Gold
B.
Iron
C.
Copper
D.
Aluminum
Show Answer & Explanation
Correct Answer: A
Gold is highly resistant to corrosion due to its non-reactive nature, which prevents it from tarnishing or reacting with air and moisture, unlike the others, which can corrode.
Q2
Easy
What is the primary reason metals are good conductors of electricity?
A.
Low density
B.
Presence of free-moving electrons
C.
High melting point
D.
Ductility
Show Answer & Explanation
Correct Answer: B
Metals conduct electricity well because they have free-moving electrons that can transfer energy rapidly, making them excellent conductors.
Q3
Easy
When magnesium reacts with hydrochloric acid, which gas is produced?
A.
Hydrogen
B.
Oxygen
C.
Carbon dioxide
D.
Nitrogen
Show Answer & Explanation
Correct Answer: A
The reaction between magnesium and hydrochloric acid produces hydrogen gas as one of the products, making option A the correct answer.
Q4
Medium
Which of the following metals is most reactive in the alkali metal group?
A.
Sodium
B.
Potassium
C.
Lithium
D.
Rubidium
Show Answer & Explanation
Correct Answer: B
Potassium is more reactive than Sodium due to its lower ionization energy, making it more willing to lose its outer electron.
Q5
Medium
What is the primary product when zinc reacts with hydrochloric acid?
A.
Zinc oxide
B.
Hydrogen gas
C.
Zinc chloride
D.
Water
Show Answer & Explanation
Correct Answer: C
The reaction of zinc with hydrochloric acid produces zinc chloride and hydrogen gas, but the primary product in terms of the compound formed is zinc chloride.
Q6
Medium
Which metal is known for forming a protective oxide layer that prevents further corrosion?
A.
Iron
B.
Aluminum
C.
Copper
D.
Lead
Show Answer & Explanation
Correct Answer: B
Aluminum forms a thin layer of aluminum oxide that adheres strongly to the surface and protects the metal from further corrosion.
Q7
Medium
When a metal reacts with water, which of the following outcomes is most likely for a highly reactive metal?
A.
No reaction occurs.
B.
Gas bubbles form with heat release.
C.
A solid precipitate forms.
D.
An explosion occurs.
Show Answer & Explanation
Correct Answer: B
Highly reactive metals, like sodium and potassium, react vigorously with water to produce hydrogen gas and heat, causing gas bubbles to form.
Q8
Hard
Which metal is considered the most reactive with water and can displace hydrogen from water at room temperature?
A.
Sodium
B.
Calcium
C.
Potassium
D.
Magnesium
Show Answer & Explanation
Correct Answer: C
Potassium is more reactive than both sodium and calcium with water, and it can displace hydrogen from water at room temperature, leading to the formation of potassium hydroxide and hydrogen gas. This reaction is highly exothermic and can be explosive.
Q9
Hard
In a reaction between aluminum and copper(II) sulfate, which is the correct balanced equation and what type of reaction is this?
A.
2Al + 3CuSO4 -> 3Cu + Al2(SO4)3; Single displacement
B.
2Al + 3CuSO4 -> 3Cu + 2Al2(SO4)3; Double displacement
C.
2Al + 3CuSO4 -> 3Cu + 2AlSO4; Combination
D.
2Al + 3CuSO4 -> 3Cu + Al3(SO4)2; Decomposition
Show Answer & Explanation
Correct Answer: A
The correct balanced equation is 2Al + 3CuSO4 -> 3Cu + Al2(SO4)3. This is a single displacement reaction where aluminum displaces copper from copper(II) sulfate. Aluminum is more reactive than copper, which allows this reaction to occur.
Q10
Hard
Which of the following metals has the highest density among the following options?
A.
Gold (Au)
B.
Lead (Pb)
C.
Aluminum (Al)
D.
Copper (Cu)
Show Answer & Explanation
Correct Answer: A
Gold has a density of approximately 19.32 g/cm³, which is significantly higher than lead (11.34 g/cm³), aluminum (2.70 g/cm³), and copper (8.96 g/cm³). Therefore, gold is the densest metal among the options given.
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Đại cương về Kim loại — THPT (Vietnam) THPT Hóa học Practice Questions Online
This page contains 146 practice MCQs for the chapter Đại cương về Kim loại in THPT (Vietnam) THPT Hóa học. The questions are organized by difficulty — 43 easy, 75 medium, 28 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.