JEE Main 2020 (Online) 5th September Morning Slot | Structure of Atom Question 75 | Chemistry

JEE Main 2020 (Online) 5th September Morning Slot

MCQ (Single Correct Answer)

-1

The difference between the radii of 3^rd and 4^th
orbits of Li²⁺ is R₁ . The difference between the
radii of 3^rd and 4^th orbits of He⁺ is $$\Delta $$R₂ .
Ratio $$\Delta $$R₁ : $$\Delta $$R₂ is :

8 : 3

3 : 2

2 : 3

3 : 8

JEE Main 2020 (Online) 5th September Morning Slot

MCQ (Single Correct Answer)

-1

The correct electronic configuration and spin-only
magnetic moment (BM) of Gd³⁺ (Z = 64), respectively, are

[Xe]5f⁷ and 8.9

[Xe]4f⁷ and 7.9

[Xe]5f⁷ and 7.9

[Xe]4f⁷ and 8.9

JEE Main 2020 (Online) 5th September Morning Slot

MCQ (Single Correct Answer)

-1

In the sixth period, the orbitals that are filled are :

6s, 5d, 5f, 6p

6s, 4f, 5d, 6p

6s, 6p, 6d, 6f

6s, 5f, 6d, 6p

JEE Main 2020 (Online) 4th September Evening Slot

MCQ (Single Correct Answer)

-1

The shortest wavelength of H atom in the Lyman series is $$\lambda $$₁. The longest wavelength in the Balmar series of He⁺ is :

$${{5{\lambda _1}} \over 9}$$

$${{36{\lambda _1}} \over 5}$$

$${{27{\lambda _1}} \over 5}$$

$${{9{\lambda _1}} \over 5}$$

PREVIOUS NEXT

JEE Main Subjects

Physics

Mechanics

Units & Measurements Vector Algebra Motion Circular Motion Laws of Motion Work Power & Energy Center of Mass and Collision Rotational Motion Properties of Matter Heat and Thermodynamics Simple Harmonic Motion Waves Gravitation

Electricity

Electrostatics Current Electricity Capacitor Magnetics Alternating Current and Electromagnetic Induction

Optics

Ray & Wave Optics

Modern Physics

Atoms and Nuclei Dual Nature of Radiation Semiconductor Communication Systems

Chemistry

Physical Chemistry

Some Basic Concepts of Chemistry Structure of Atom Redox Reactions Gaseous State Equilibrium Solutions Thermodynamics Electrochemistry Chemical Kinetics and Nuclear Chemistry Solid State Surface Chemistry

Inorganic Chemistry

Periodic Table & Periodicity Chemical Bonding & Molecular Structure Isolation of Elements Hydrogen s-Block Elements p-Block Elements d and f Block Elements Coordination Compounds Environmental Chemistry

Organic Chemistry

Basics of Organic Chemistry Hydrocarbons Haloalkanes and Haloarenes Alcohols, Phenols and Ethers Aldehydes, Ketones and Carboxylic Acids Compounds Containing Nitrogen Polymers Biomolecules Chemistry in Everyday Life Practical Organic Chemistry

Mathematics

Algebra

Sets and Relations Quadratic Equation and Inequalities Sequences and Series Mathematical Induction and Binomial Theorem Matrices and Determinants Permutations and Combinations Probability Vector Algebra 3D Geometry Complex Numbers Statistics Mathematical Reasoning

Trigonometry

Trigonometric Functions & Equations Inverse Trigonometric Functions Properties of Triangle

Coordinate Geometry

Straight Lines and Pair of Straight Lines Circle Conic Sections

Calculus

Functions Limits, Continuity and Differentiability Differentiation Application of Derivatives Indefinite Integrals Definite Integrals and Applications of Integrals Differential Equations