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Matter and Its States: Practice Questions for Super TET

This practice session covers fundamental chemistry concepts including states of matter, physical and chemical changes, atomic structure, periodic table properties, chemical bonding, and important everyday compounds.

Teaching
Chemistry
English · 6 topics
Checked against the video on 25 Oct 2026

Made by AI from the YouTube video SUPER TET Science Class 27 | पदार्थ एवं पदार्थ की अवस्थाएँ Part-1 | 60 MCQ Practice | Chemistry (opens YouTube in a new tab) by Balaji Study Adda, then checked against it. All credit for the teaching goes to the creator. Tap a topic’s time to confirm a fact in the video.

Matter and Its States: Practice Questions for Super TET

English6 topics · 7 MCQs · 14 flashcardsWatch the video (opens YouTube in a new tab)

Checked against the video

In short

This practice session covers fundamental chemistry concepts including states of matter, physical and chemical changes, atomic structure, periodic table properties, chemical bonding, and important everyday compounds.

Matter and Its Physical States

Anything that occupies space and has mass is defined as matter.
Rusting is a chemical property because the chemical identity of the substance changes, whereas color, density, and melting point are physical properties.
Must knowIn solids, intermolecular attractive forces between particles are strongest, making them virtually incompressible with fixed shape and volume.
Liquids possess a definite volume but no fixed shape, taking the shape of the container they are kept in.
Gases have neither a fixed shape nor fixed volume, have the weakest attractive forces, are highly compressible, and expand in all directions.

Fourth and Fifth States of Matter

Must knowPlasma is the fourth state of matter, formed at extremely high temperatures by the ionization of gas particles.
- Naturally present in the Sun, stars, and lightning discharges.
Must knowThe fifth state of matter, Bose-Einstein Condensate (BEC), forms when certain gases are cooled to extremely low temperatures near -273°C.
Melting of ice and dissolution of sugar in water are physical changes because only the physical state or form changes and no new substance is formed.
Burning of a candle and rusting of iron are examples of chemical changes where new substances are formed.

Measurement, Phase Transitions, and Mixtures

Mass represents the quantity of matter present in a body and remains constant everywhere, with an SI unit of kilogram (kg).
Volume is the space occupied by matter, having an SI unit of cubic meter (m³); 1 liter equals 10⁻³ m³, and 1 liter of water has a mass of approximately 1 kg.
Must knowDirect transition of a solid into gas without turning into liquid is called sublimation, exhibited by camphor, naphthalene, and dry ice (solid CO2).
Diffusion refers to the spontaneous spreading of particles from a region of higher concentration to lower concentration, such as perfume fragrance spreading across a room.
An element consists of only one kind of atom and cannot be broken down chemically, whereas compounds (like water and sodium chloride) form by chemical combination of two or more elements in a fixed ratio.
A mixture consists of substances combined physically without fixed proportions, and heterogeneous mixtures (like sand in water or oil in water) lack uniform composition throughout.

Atomic Structure and Modern Periodic Table

The atomic nucleus contains positively charged protons and electrically neutral neutrons, while negatively charged electrons revolve outside the nucleus.
J.J. Thomson discovered the electron in 1897 as a negatively charged subatomic particle.
Atomic number (Z) denotes the number of protons in an atom's nucleus and uniquely identifies the element.
Must knowMass number (A) equals the total sum of protons and neutrons in the nucleus (A = Z + N).
Isotopes are atoms of the same element having the identical atomic number but different mass numbers (e.g., Protium, Deuterium, Tritium).
Isobars are atoms of different elements having identical mass numbers but different atomic numbers (e.g., Carbon-14 and Nitrogen-14).
Must knowIn the Modern Periodic Table proposed by Moseley, properties of elements are periodic functions of their atomic number, containing 7 periods and 18 groups.

Chemical Bonding, Metals, and Alloys

Must knowAn ionic bond forms via complete transfer of electrons from a metal (forming cations) to a non-metal (forming anions), as in NaCl.
A covalent bond forms through mutual sharing of one or more electron pairs between non-metal atoms (e.g., H2, Cl2).
Hydrogen bonds form between hydrogen and highly electronegative atoms like fluorine, oxygen, or nitrogen.
Oxides of metals are generally basic in nature, whereas oxides of non-metals are acidic.
Metalloids such as boron, silicon, and germanium exhibit intermediate properties between metals and non-metals and act as semiconductors.
In the metal activity series, potassium (K) is the most reactive metal, while gold (Au) is the least reactive.
Brass is an alloy composed of copper (Cu) and zinc (Zn), whereas bronze is an alloy of copper (Cu) and tin (Sn).
Stainless steel is made by alloying iron with chromium and nickel to prevent rusting.
Must knowBauxite (Al2O3·2H2O) is the primary economic ore of aluminium.
Galvanization is the method of applying a protective thin layer of zinc onto iron to prevent corrosion.

Alloy	Constituent Metals	Primary Uses
Brass	Copper (Cu) + Zinc (Zn)	Making utensils
Bronze	Copper (Cu) + Tin (Sn)	Medals and statues
Stainless Steel	Iron (Fe) + Chromium (Cr) + Nickel (Ni)	Rust-resistant equipment

Acids, Bases, Everyday Chemistry, and Reactions

Acids have a sour taste, have a pH below 7, and turn blue litmus paper red (e.g., citric fruits, vinegar).
Neutralization is the reaction between an acid and a base producing salt and water; pure neutral water has a pH of 7.
Must knowHydrochloric acid (HCl) is naturally produced in the stomach to aid digestion of food.
Vinegar primarily contains acetic acid, while baking soda used in cooking is chemically sodium bicarbonate (NaHCO3).
Thermoplastics (polyethylene, PVC, nylon) soften when heated and harden on cooling, while thermosetting plastics (Bakelite, melamine) permanently set once molded.
Crookes glass protects eyes from ultraviolet (UV) radiation in sunglasses, while borosilicate glass (Pyrex) is heat-resistant and used for laboratory glassware.
Chemical fertilizers like urea and DAP provide nitrogen and phosphorus to plants to increase soil fertility.
Carbon has a valency of 4 (tetravalent), forms strong chains, and its hardest natural allotrope is diamond, while graphite conducts electricity and is used in pencil leads.
Fullerenes (like spherical C60 buckyballs) are utilized in nanotechnology.
Must knowLPG contains primarily propane and butane, whereas CNG and biogas consist mainly of methane (CH4).
The outermost zone of a flame is blue, represents complete combustion, and is the hottest region.
Oxidation involves the addition of oxygen or removal of hydrogen; oxidation of fats and oils leading to foul odor is called rancidity, which is prevented by antioxidants.

Key terms

Sublimation: Direct phase change from solid to gas without entering the liquid state
Diffusion: Spontaneous movement and mixing of particles from higher to lower concentration
Isotopes: Atoms of the same element having identical atomic number but different mass numbers
Isobars: Atoms having identical mass numbers but different atomic numbers
Galvanization: Process of coating iron with a protective layer of zinc to prevent rusting
Rancidity: Oxidation of fats and oils leading to unpleasant smell and taste

Formulas

A = Z + N: Mass number equals atomic number (protons) plus neutrons

Exam tips and traps

Remember the difference between baking soda (sodium bicarbonate, NaHCO3) and washing soda (sodium carbonate) by associating 'bi' with cooking/food preparation.

Quick revision

Read these the night before the exam.

Plasma forms at very high temperatures by gas ionization and exists in stars and lightning.
Bose-Einstein Condensate is achieved near -273°C (absolute temperature range).
Camphor, naphthalene, and dry ice directly sublime into gas upon heating.
J.J. Thomson discovered the electron in 1897.
Modern Periodic Table has 7 horizontal periods and 18 vertical groups arranged by atomic number.
Potassium is the most active metal while gold is the least reactive in the activity series.
Brass is made of copper and zinc, whereas bronze is copper and tin.
Bauxite with formula Al2O3·2H2O is the chief ore of aluminium.
Hydrochloric acid (HCl) helps digest food inside the human stomach.
LPG consists mainly of propane and butane, whereas CNG consists mainly of methane.
The blue outer zone of a flame represents complete combustion and maximum heat.

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