Access Now and Score More: JEE Main - D and F Block Elements Important Questions with Solutions PDF
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FAQs on Chemistry Important JEE Mains Questions on D and F Block Elements
1. What are the general properties of the d-block elements?
The properties of the d-block elements are as follows;
All the elements in the 3rd series, except copper, are considered good reducing agents.
The ionisation potential of the transition elements are said to increase by negligible amounts as a result of the shielding effect.
The transition elements have less reactivity. This reactivity decreases as a result of the result in the atomic number. and high enthalpies of atomization.
Due to the shielding of the valence shell electrons, provided by the electrons present in the d orbitals of the penultimate shell, the atomic radii of the transition elements undergo a decrease by negligible amounts.
2. What is the metallic character of the d-block elements?
It is to be noted that all the transition elements have, metallic nature and all of them consist of simple ccp hcp or bcc lattices. they have strong metallic bonds owing to their greater effective nuclear charge and also because they possess large numbers of valence electrons. They are considered hard possessing high densities. The presence of free electrons makes them good conductors of heat and electricity.
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3. Where to download the important questions for d and f block elements?
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4. What are the properties of lanthanides?
The properties of the lanthanides are given below;
They are said to be good conductors of heat and electricity.
Their melting points range from 1000K to 1200K. But it is to be noted that Samarium is an exception.
They are said to be soft metals with silvery-white color to them.
Their brightness reduces and dullness is witnessed in their color when they are exposed to air.
From lanthanum and lutetium, one observes a decrease in the atomic and ionic radii, which is termed as lanthanoid contraction.
They possess non-radioactive nature with the exception of promethium.
5. What are the similarities between lanthanides and actinides?
Both lanthanides and actinides are involved in filling (n-2) f orbitals.
Both Lanthanides and actinides possess oxidation states of +3.
Both Lanthanides and actinides are considered highly electropositive. They are also very reactive in nature.
Both lanthanides and actinides seem to present magnetic properties.
With the increase in the atomic numbers, a decrease in atomic and ionic size is witnessed in Lanthanides and actinides.
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6. Why are D block elements called transition elements?
The D block elements are called transition elements because they have partially filled d orbitals and exhibit properties that lie between those of s-block and p-block elements. They often show variable oxidation states and form coloured compounds, typical of elements in transition between different blocks.
7. What is the significance of the term "lanthanide contraction"?
Lanthanide contraction refers to the gradual decrease in atomic and ionic radii from lanthanum to lutetium due to poor shielding by the 4f electrons. This contraction impacts the chemical properties of elements, especially in the transition metals that follow the lanthanides.
8. What makes transition metals effective catalysts?
Transition metals are effective catalysts because they have variable oxidation states and can form temporary bonds with reactants. This allows them to lower activation energy and facilitate various chemical reactions, a property commonly used in industrial processes.
9. How do D block elements exhibit magnetic properties?
D block elements exhibit magnetic properties due to the presence of unpaired electrons in their d orbitals. Elements with unpaired electrons show paramagnetic behaviour, while those with paired electrons are diamagnetic.
10. What are the common oxidation states of D block elements?
D block elements exhibit a range of oxidation states due to the similar energies of their s and d orbitals. For example, iron commonly shows +2 and +3 states, while manganese exhibits oxidation states from +2 to +7.
11. Why do transition metals form coloured compounds?
Transition metals form coloured compounds due to d-d electron transitions within the partially filled d orbitals. When light is absorbed, electrons move between d orbitals of slightly different energies, which results in the appearance of colour.
12. How do F block elements differ from D block elements?
F block elements, or inner transition elements, have electrons filling the f orbitals, whereas D block elements fill the d orbitals. F block elements, such as lanthanides and actinides, often exhibit more complex electron configurations and tend to be more reactive.
13. What are the main uses of lanthanides in modern technology?
Lanthanides are widely used in technology, especially in the production of strong magnets, phosphors for colour TV screens, energy-efficient lighting, and rechargeable batteries. They also play a role in catalysts and high-tech devices.
14. Why are actinides generally radioactive?
Actinides are generally radioactive due to their large atomic numbers and unstable nuclei. Elements like uranium and thorium naturally undergo radioactive decay, emitting radiation as they transform into more stable elements.
15. What are some common alloys involving D block elements?
Common alloys of D block elements include stainless steel (iron and chromium), brass (copper and zinc), and bronze (copper and tin). These alloys are valued for their strength, corrosion resistance, and diverse industrial applications.
16. What types of D And F Block Elements Class 12 JEE Questions asked in JEE exams?
In JEE exams, questions on D and F block elements often focus on electronic configurations, oxidation states, colour and magnetic properties, lanthanide contraction, and important reactions involving these elements.
17. Where can I find D And F Block Elements JEE Mains Questions PDF for practice?
You can find a collection of JEE questions on D and F block elements in study materials, previous year papers, and from Vedantu. These sources provide practice questions, answers, and solutions for JEE preparation.
18. How important are JEE Questions On D And F Block Elements in the JEE syllabus?
JEE Questions On D And F Block Elements are quite important in JEE Chemistry as they cover essential concepts related to the periodic table and element behaviour, often contributing a few marks to the exam.
19. Are D And F Block Elements IIT JEE Questions PDF helps for IIT JEE preparation?
Vedantu offers D And F Block Elements IIT JEE Questions PDF. These PDFs are great for focused practice, as they compile frequently tested questions and concepts in one place.
