MHT CET 2026 13th April Evening Shift | Atomic Structure Question 12 | Chemistry

If the energy of an electron in the first Bohr orbit of the H-atom is $-2.18 \times 10^{-18}$ J then the energy of the electron in the second orbit will be

$-2.18 \times 10^{-18}$ J

$-4.36 \times 10^{-18}$ J

$-0.545 \times 10^{-18}$ J

$-0.273 \times 10^{-18}$ J

MHT CET 2026 13th April Morning Shift

MCQ (Single Correct Answer)

-0

Which of the following pairs represents isobars?

${}^{3}\text{He}_2$ and ${}^{4}\text{He}_2$

${}^{24}\text{Mg}_{12}$ and ${}^{25}\text{Mg}_{12}$

${}^{40}\text{K}_{19}$ and ${}^{40}\text{Ca}_{20}$

${}^{40}\text{K}_{19}$ and ${}^{39}\text{K}_{19}$

MHT CET 2026 11th April Evening Shift

MCQ (Single Correct Answer)

-0

What are the total number of electrons present in s and p orbitals respectively in the argon?

$12$ and $6$

$8$ and $12$

$6$ and $12$

$18$ and $6$

MHT CET 2026 11th April Morning Shift

MCQ (Single Correct Answer)

-0

Match List I with List II

List I Element	List II Number of Neutron
(A). ${}^{24}_{12}Mg$	(I). $5$
(B). ${}^{27}_{13}Al$	(II). $12$
(C). ${}^{9}_{4}Be$	(III). $6$
(D). ${}^{12}_{6}C$	(IV). $14$

Choose the correct answer from the options given below:

(A) - (I), (B) - (II), (C) - (III), (D) - (IV)

(A) - (II), (B) - (IV), (C) - (I), (D) - (III)

(A) - (I), (B) - (II), (C) - (IV), (D) - (III)

(A) - (III), (B) - (IV), (C) - (I), (D) - (II)

PREVIOUS NEXT

MHT CET Subjects

Browse all chapters by subject

Chemistry

Physical Chemistry

Some Basic Concepts of Chemistry Atomic Structure States of Matter Thermodynamics Chemical Equilibrium Ionic Equilibrium Liquid Solution Redox Reactions Surface Chemistry Solid State Electrochemistry Chemical Kinetics Nuclear Chemistry

Inorganic Chemistry

Periodic Table and Periodicity Chemical Bonding and Molecular Structure Metallurgy Hydrogen and It's Compounds s-Block Elements p-Block Elements d and f Block Elements Coordination Compounds Environmental Chemistry

Organic Chemistry

IUPAC Nomenclatures General Organic Chemistry Isomerism Hydrocarbons Haloalkanes and Haloarenes Alcohol, Phenols and Ethers Aldehyde and Ketone Carboxylic Acids and Its Derivatives Compounds Containing Nitrogen Polymers Biomolecules Chemistry in Everyday Life Practical Organic Chemistry