Chapter 10 of 18
Revision Notes
Chemistry — Revision Notes
XAT · General Knowledge
Free Chemistry revision notes for XAT General Knowledge 2026 — key concepts, formulas, and definitions for quick revision.
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Revision Notes — Chemistry
Key concepts, formulas, and definitions from Chemistry for XAT General Knowledge preparation.
Key Topics to Revise
1
Matter and Its States
- Matter exists in three primary states: solid (definite shape and volume), liquid (definite volume, no definite shape), and gas (no definite shape or volume)
- Pure substances are classified as elements (simplest form, cannot be broken down) and compounds (two or more elements in fixed proportion)
- Mixtures can be homogeneous (uniform composition throughout) or heterogeneous (non-uniform composition with visible boundaries)
2
Atomic Structure and Periodic Properties
- Atomic number (Z) = number of protons = number of electrons in neutral atom
- Mass number (A) = number of protons + number of neutrons
- Isotopes have same atomic number but different mass numbers
3
Chemical Bonding and Molecular Structure
- Ionic bonds form through complete electron transfer; covalent bonds through electron sharing
- Ionic compounds have high melting points, conduct electricity in molten state, soluble in polar solvents
- Covalent compounds have lower melting points, generally poor electrical conductors, soluble in non-polar solvents
4
Acids, Bases, and Salts
- Acids taste sour, turn blue litmus red, release H⁺ ions in solution
- Bases taste bitter, turn red litmus blue, release OH⁻ ions in solution
- pH scale ranges from 0-14; pH < 7 (acidic), pH = 7 (neutral), pH > 7 (basic)
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Key Concepts
Matter exists in three primary statesAtoms consist of protonsChemical bonds form through ionic (electronAcids donate protons while bases acceptRedox reactions involve electron transfer between
Frequently Asked Questions
What topics are covered in Chemistry for XAT?
Chemistry is an important chapter in XAT General Knowledge. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Matter and Its States, Atomic Structure and Periodic Properties, Chemical Bonding and Molecular Structure, Acids, Bases, and Salts.
How important is Chemistry for XAT?
Chemistry is a frequently tested chapter in XAT General Knowledge. Questions from this chapter appear regularly in previous year papers.
How to prepare Chemistry for XAT?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.
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Practice questions, revision notes, formula sheet and AI doubt-solver for XAT General Knowledge.