Here are 20 multiple-choice questions (MCQs) from the d and f block elements based on the NCERT syllabus:
1. Which of the following is not a d-block element? a) Iron
b) Zinc
c) Copper
d) Calcium
Answer: d) Calcium
2. Which of the following is a characteristic property of d-block elements?
a) Low melting points
b) Form colored compounds
c) Poor conductors of electricity
d) None of the above
Answer: b) Form colored compounds
3. Which element has the highest melting point in the d-block?
a) Iron
b) Tungsten
c) Chromium
d) Copper
Answer: b) Tungsten
4. Which of the following is not a transition element?
a) Scandium
b) Zinc
c) Titanium
d) Nickel
Answer: b) Zinc
5. Which transition metal is widely used as a catalyst in the Haber process for ammonia synthesis?
a) Iron
b) Platinum
c) Copper
d) Zinc
Answer: a) Iron
6. Which of the following f-block elements is radioactive?
a) Thorium
b) Cerium
c) Neodymium
d) Lanthanum
Answer: a) Thorium
7. The general electronic configuration of d-block elements is:
a) (n-1)d¹⁻¹⁰ ns¹⁻²
b) (n-1)p⁶ ns²
c) (n-1)s² np⁶
d) (n-1)d⁶ ns²
Answer: a) (n-1)d¹⁻¹⁰ ns¹⁻²
8. Which of the following ions is colorless?
a) Fe²⁺
b) Cu²⁺
c) Zn²⁺
d) Cr³⁺
Answer: c) Zn²⁺
9. The actinides are characterized by the filling of:
a) 3d orbitals
b) 4f orbitals
c) 5f orbitals
d) 6d orbitals
Answer: c) 5f orbitals
10. Which of the following oxidation states is most common for the lanthanides?
a) +1
b) +2
c) +3
d) +4
Answer: c) +3
11. Which of the following transition metals has the highest number of oxidation states?
a) Iron
b) Manganese
c) Copper
d) Chromium
Answer: b) Manganese
12. Which element is commonly used in making high-temperature alloys?
a) Gold
b) Tungsten
c) Silver
d) Zinc
Answer: b) Tungsten
13. Which of the following is not an f-block element?
a) Uranium
b) Plutonium
c) Thorium
d) Zinc
Answer: d) Zinc
14. Which of the following elements belongs to the first transition series?
a) Scandium
b) Yttrium
c) Lanthanum
d) Thorium
Answer: a) Scandium
15. Which of the following is a lanthanide?
a) Actinium
b) Cerium
c) Thorium
d) Plutonium
Answer: b) Cerium
16. Which of the following elements shows the highest paramagnetism?
a) Copper
b) Manganese
c) Zinc
d) Cobalt
Answer: b) Manganese
17. Which of the following elements does not form colored compounds?
a) Scandium
b) Copper
c) Iron
d) Chromium
Answer: a) Scandium
18. Which of the following lanthanides is used in cigarette lighters?
a) Cerium
b) Thorium
c) Neodymium
d) Promethium
Answer: a) Cerium
19. Which f-block element is used in nuclear reactors?
a) Europium
b) Uranium
c) Samarium
d) Gadolinium
Answer: b) Uranium
20. What is the common oxidation state of actinides?
a) +2
b) +3
c) +4
d) +5
Answer: b) +3
These questions cover important concepts from the d-block and f-block elements as per the NCERT curriculum.
No comments:
Post a Comment