This chapter distinguishes open, closed, and isolated systems before applying the first law, ΔU=q+w, to track energy changes. Enthalpy, entropy,
Class 11 Chemistry Chapter 5 Chemical Thermodynamics – Revision Notes Read More »
An isolated system, which exchanges neither matter nor energy with its surroundings, is one of several system types tested at
Class 11 Chemistry Chapter 5 Chemical Thermodynamics – Extra Questions with Answers Read More »
Chapter 5 of NCERT Class 11 Chemistry, titled “Thermodynamics” (Unit 5 in the current 2026-27 reprint of Chemistry Part-I), builds
Bonding in this chapter splits into ionic bonds, formed by electron transfer, and covalent bonds governed by the octet rule,
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Electron transfer forming ionic bonds, and the tetrahedral shape and sp³ hybridization of methane, are among the recurring ideas tested
Chapter 4, “Chemical Bonding and Molecular Structure,” explains why and how atoms combine to form molecules and ions — covering
The periodic table’s history runs from Doebereiner’s triads through Newlands and Mendeleev to Moseley’s modern law based on atomic number,
Henry Moseley’s atomic-number-based periodic law, which replaced Mendeleev’s mass-based version, is the starting point for these questions. They go on
Chapter 3 of NCERT Class 11 Chemistry, “Classification of Elements and Periodicity in Properties,” traces the historical development of the
Atomic models evolved from Thomson’s discovery of the electron through Rutherford’s nuclear model to Bohr’s orbits and finally the quantum
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J.J. Thomson’s discovery of the electron and James Chadwick’s discovery of the neutron open this set of questions on atomic
Class 11 Chemistry Chapter 2 Structure of Atom – Extra Questions with Answers Read More »
Chapter 2, “Structure of Atom,” of the current NCERT Class 11 Chemistry (Part I) textbook builds the quantum mechanical picture
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