Choose the correct answers. - \(Mn_2O_7 \) is a oil at room temperature.
- \(V_2O_4\) react with acid to give \(VO^{2+}\).
- \(CrO\) is a basic oxide.
- \(V_2O_5\) does not react with acids.
- \(Mn_2O_7 \) is a oil at room temperature.
- \(V_2O_4\) react with acid to give \(VO^{2+}\).
- \(CrO\) is a basic oxide.
- \(V_2O_5\) does not react with acids.
- A, B and C only
- B, C and D only
- A only
- B and C only
The Correct Option is A
Solution and Explanation
Top Questions on Some Applications of d- and f-Block Elements
- Attempt any five of the following: (a) Cu\(^+\) is not stable in aqueous solution. Comment.
- CBSE Compartment XII - 2025
- Chemistry
- Some Applications of d- and f-Block Elements
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(a) With the same d$^8$ orbital configuration, Mn$^{2+}$ ion is an oxidizing agent whereas Cr$^{2+}$ ion is a reducing agent.
(b) Atomic contraction is greater from element to element than much from lanthanides.
(c) Transition metals form large number of interstitial compounds with H, B, C, and N.- CBSE CLASS XII - 2025
- Chemistry
- Some Applications of d- and f-Block Elements
- Assertion (A): Cuprous salts are diamagnetic.
Reason (R): Cuprous ion has completely filled 3d-orbitals.- CBSE CLASS XII - 2025
- Chemistry
- Some Applications of d- and f-Block Elements
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(b) Zinc is not regarded as a transition element.- CBSE CLASS XII - 2025
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Questions Asked in JEE Main exam
Which of the following statement is true with respect to H\(_2\)O, NH\(_3\) and CH\(_4\)?
(A) The central atoms of all the molecules are sp\(^3\) hybridized.
(B) The H–O–H, H–N–H and H–C–H angles in the above molecules are 104.5°, 107.5° and 109.5° respectively.
(C) The increasing order of dipole moment is CH\(_4\)<NH\(_3\)<H\(_2\)O.
(D) Both H\(_2\)O and NH\(_3\) are Lewis acids and CH\(_4\) is a Lewis base.
(E) A solution of NH\(_3\) in H\(_2\)O is basic. In this solution NH\(_3\) and H\(_2\)O act as Lowry-Bronsted acid and base respectively.
- JEE Main - 2025
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- JEE Main - 2025
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The velocity-time graph of an object moving along a straight line is shown in the figure. What is the distance covered by the object between \( t = 0 \) to \( t = 4s \)?
- JEE Main - 2025
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- Let \( P_n = \alpha^n + \beta^n \), \( P_{10} = 123 \), \( P_9 = 76 \), \( P_8 = 47 \), and \( P_1 = 1 \). The quadratic equation whose roots are \( \frac{1}{\alpha} \) and \( \frac{1}{\beta} \) is:
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- The value of current \( I \) in the electrical circuit as given below, when the potential at \( A \) is equal to the potential at \( B \), will be ________________________ A.
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JEE Main Notification
GMC Azamgarh Admission 2025: Dates, Courses, Fees, Eligibility, SelectJuly 22, 2025Concepts Used:
Applications of d and f block elements
The d-block and f-block elements of the periodic table have a wide range of applications in various fields due to their unique chemical and physical properties.
One of the most important applications of d-block elements is in the field of metallurgy. Many d-block elements, such as iron, copper, and nickel, are widely used in the production of steel, alloys, and other metals. These elements are also used in the construction of electrical wires, electronic devices, and machinery due to their high thermal and electrical conductivity.
F-block elements have unique optical and magnetic properties that make them useful in a variety of applications. For example, neodymium and samarium are used in the production of high-strength magnets for use in computer hard drives, speakers, and medical equipment. Lanthanum and gadolinium are used in the production of camera lenses, optical fibers, and x-ray screens.
D-block elements are also used in catalysis, a process that accelerates chemical reactions without being consumed in the process. These elements are used as catalysts in many industrial processes, such as the production of fertilizers, plastics, and fuels.
F-block elements also find applications in nuclear power generation, as some isotopes of actinides are used in nuclear reactors for electricity generation.
Overall, the d-block and f-block elements have a wide range of applications in various fields, including metallurgy, electronics, optics, catalysis, and energy production. The unique properties of these elements make them crucial components of many modern technologies.