CBSE 9 Science · U2

Matter - Its Nature and Behaviour

Syllabus-listed 25-mark theory unit covering homogeneous and heterogeneous mixtures, solutions, suspensions, colloids, concentration, separation techniques, solubility graphs, atomic models, shell distribution, symbols, valency, atomic number, mass number, isotopes, isobars, laws of chemical combination, formulae, molecular mass, and formula unit mass.

Test yourself

A focused, distraction-free run through 80 multiple-choice questions. Hints if you need them; your score at the end.

Start practice

Difficulty guide

The label describes the problem, not your ability.

1/5 - Foundational

Warm-up setup; checks one basic idea.

2/5 - Routine exam skill

Normal syllabus skill; usually one main rule or interpretation.

3/5 - Standard multi-step

Exam-style problem with multiple steps or a common trap.

4/5 - Hard exam skill

High-end exam problem; combines methods carefully.

5/5 - Challenge

Stretch problem beyond normal exam pressure.

Topic 2.1

Mixtures, Solutions and Concentration

Homogeneous and heterogeneous mixtures, solutions, colloids, suspensions and concentration expressions.

Topic 2.2

Separation Techniques and Solubility

Crystallisation, distillation, chromatography, sublimation, centrifugation, loading, sedimentation and solubility graphs.

Topic 2.3

Atomic Models and Electronic Arrangement

Subatomic particles, Thomson, Rutherford and Bohr models, shells and electronic distributions up to element 18.

Topic 2.4

Atomic Number, Mass Number and Valency

Calculating protons, neutrons and electrons; ions; isotopes, isobars and valency-based formula reasoning.

Topic 2.5

Chemical Formulae, Masses and Laws

Law of conservation of mass, law of constant proportion, Dalton's theory, ions, covalent and ionic compounds, molecular mass and formula unit mass.

Please provide feedback

Tell us what would make StudyLoop better.

Feedback type

The current page address, technical context, selected issue type, and any details or email you enter are sent with this report. Your StudyLoop profile and answers are not sent.