CIE iGCSE Co-Ordinated Science C8.4 Transition elements Exam Style Questions Paper 1
Question
Some properties of different metals are shown. Which metals are transition elements?
| density g/cm³ | melting point/°C | colour of compound formed by the metal | |
|---|---|---|---|
| 1 | 1.54 | 851 | white |
| 2 | 8.91 | 1455 | green |
| 3 | 5.80 | 1890 | lilac |
| 4 | 11.3 | 328 | white |
A) 1 and 2
B) 1 and 4
C) 2 and 3
D) 3 and 4
▶️Answer/Explanation
Answer: C) 2 and 3
Explanation: Transition elements typically have high densities, high melting points, and form colored compounds. Metals 2 and 3 fit these criteria.
Question
Which row describes a transition element?
▶️Answer/Explanation
Ans :A
Question
A gas is used in welding metals together at high temperatures.
The gas is used to provide an inert atmosphere.
What is the gas?
A argon
B carbon dioxide
C fluorine
D oxygen
▶️Answer/Explanation
Ans :A
Question
What is not a property of transition elements?
(A) They often act as catalysts.
(B) They form coloured compounds.
(C) They have high densities.
(D) They have low melting points.
▶️Answer/Explanation
Ans: D
Question
The box lists four substances.
Which substance is an element that forms a basic oxide and coloured compounds?
A Br2 B CO C Cu D Na
▶️Answer/Explanation
Ans : C
Question
The properties of some substances are listed.
1 form acidic oxides
2 have high melting points
3 act as catalysts
4 form coloured compounds
What are the properties of transition metals?
(A) 1, 2 and 3 (B) 1, 2 and 4 (C) 1, 3 and 4 (D) 2, 3 and 4
▶️Answer/Explanation
Ans : D
Question
Element X increases the rate of some reactions.
Element X is unchanged at the end of these reactions.
What is the position of element X in the Periodic Table?
▶Answer/Explanation
Ans : D
Question
Lead has a high density of 11.3 g/cm3. Lead(II) iodide is a bright yellow solid.
Which property of lead is not a property of a transition element?
(A) Lead conducts electricity.
(B) Lead forms alloys.
(C) Lead has a relatively low melting point.
(D) Lead(II) oxide is basic.
▶️Answer/Explanation
Ans: C
Question
Manganese is a transition element. What is a property of manganese?
(A) high melting point
(B) low density
(C) thermal insulator
(D) transparent
▶️Answer/Explanation
Ans: A
Question
The results of two tests on compound P are shown.
What is P?
(A) lithium bromide
(B) lithium chloride
(C) sodium bromide
(D) sodium chloride
▶️Answer/Explanation
Ans: B
Question
What is not a property of transition elements?
(A) form coloured compounds
(B) good electrical conductivity
(C) high melting point
(D) low density
▶️Answer/Explanation
Ans: D
Question
Which elements in the Periodic Table form coloured compounds?
A Group I metals
B halogens
C noble gases
D transition metals
▶️Answer/Explanation
Answer: D transition metals
Explanation: Transition metals are known for forming colored compounds due to the presence of partially filled d-orbitals, which allow for the absorption of specific wavelengths of light.
Question
Which property is not shown by transition elements?
A. They can act as catalysts.
B. They form coloured compounds.
C. They have high melting points.
D. They have low densities.
▶️Answer/Explanation
Answer: D. They have low densities.
Explanation: Transition elements typically have high densities, high melting points, can act as catalysts, and form coloured compounds. Low density is not a characteristic of transition elements.
Question
Which statement describes transition elements?
A) They form colourless compounds.
B) They have low densities.
C) They have low melting points.
D) They often act as catalysts.
▶️Answer/Explanation
Answer: D) They often act as catalysts.
Explanation: Transition elements are known for their ability to act as catalysts due to their variable oxidation states and ability to form complex ions. They also typically form coloured compounds and have high melting points and densities.
Question
What is a property of transition elements?
A. They form coloured compounds.
B. They form diatomic molecules.
C. They have low densities.
D. They have low melting points.
▶️Answer/Explanation
Answer: A. They form coloured compounds.
Explanation: Transition elements are known for forming coloured compounds due to the presence of partially filled d-orbitals, which allow for the absorption of specific wavelengths of light.