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Page 1 LEARNERS HABITAT 1] Which series of elements have nearly the same atomic radii a) F, Cl, Br, I b) Na, K, Rb, H c) Fe, Co, Ni, Cu d) Cr, Mn, Fe 2] The outer electronic configuration of chromium is a) 4s 1 3d 5 b) 4s 2 c) 4s 0 d) 4s 2 3d 5 3] The most abundant transition element is a) Iron b) Copper c) Aluminium d) Zinc 4] A Typical transition metal is a) Zn b) Co c) Cu d) W 5] The most abundant transition element in earth curst is a) Fe b) Co c) Cu d) Zn 6] How many d-electrons are in Cr +2 ion? a) 4 b) 5 c) 6 d) 3 7] The first man-made element is a) Iron b) Technetium c) Zirconium d) Mercury 8] Among d-block elements, the most abundant element belongs to the a) First transition series b) Second transition series c) Third transition series d) Fourth transition series 9] Which of the following statements concerning transition elements is not true? a) They are all metals b) They easily form complexes c) Compounds containing their ions are coloured d) They show multiple oxidation states always differing by two units 10] The following is not a typical transition element a) Cu b) Ag c) Au d) Mn LH Practice Sheet D & F BLOCK ELEMENTS LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 www.learnershabitat.ac.in Page 1Read More
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FAQs on Question Bank: d & f-Block Elements - Chemistry Class 12 - NEET
| 1. What are d-block elements and f-block elements? |  |
Ans. d-block elements and f-block elements are two groups of transition elements in the periodic table. The d-block elements are located in groups 3 to 12, while the f-block elements are located in the two rows below the main body of the periodic table. These elements have partially filled d or f orbitals and exhibit characteristic properties such as variable oxidation states and the ability to form complex compounds.
| 2. What are the properties of d-block elements? | |
Ans. The properties of d-block elements include the ability to form colored compounds, variable oxidation states, high melting and boiling points, and the formation of complex compounds. They are good conductors of electricity and have high densities. These elements also show catalytic activity and have a tendency to form paramagnetic compounds.
| 3. What is the significance of f-block elements? | |
Ans. The f-block elements, also known as inner transition elements, are significant due to their unique electronic configurations and properties. These elements have partially filled f orbitals, which make them useful in the production of colored compounds, catalysts, and magnetic materials. They also play a crucial role in nuclear power generation and have applications in various fields such as medicine and electronics.
| 4. How do d-block elements form complex compounds? | |
Ans. D-block elements have the ability to form complex compounds due to their availability of empty d orbitals. These empty orbitals can accept electron pairs from other atoms or ions, forming coordination complexes. The d orbitals act as Lewis acid centers, allowing the formation of coordination bonds with ligands. The resulting complex compounds often exhibit distinctive properties such as color and stability.
| 5. What are the applications of d and f-block elements? | |
Ans. D and f-block elements find various applications in different fields. Some applications include the use of transition metals (d-block) as catalysts in chemical reactions, the use of lanthanides (f-block) in medical imaging and lighting technology, and the use of actinides (f-block) in nuclear power generation. These elements also find applications in the production of magnetic materials, corrosion-resistant alloys, and electronic devices.
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