One Liner Questions: Materials | Science & Pedagogy Paper 2 for CTET & TET Exams - CTET & State TET PDF Download

One Liner Questions

Q1: What is the fundamental property that all states of matter share?

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Ans: They occupy space and have mass.

Q2: Which state of matter has the highest kinetic energy?

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Ans: Gaseous state.

Q3: What is the SI unit of temperature?

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Ans: Kelvin (K).

Q4: Which process involves direct conversion of a solid into a gas without passing through the liquid state?

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Ans: Sublimation.

Q5: What happens to the boiling point of water when external pressure is increased?

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Ans: It increases.

Q6: Which type of mixture has a uniform composition throughout?

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Ans: Homogeneous mixture.

Q7: What is the term for the heat energy required to convert 1 kg of solid into a liquid at its melting point?

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Ans: Latent heat of fusion.

Q8: What is the key difference between a compound and a mixture?

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Ans: A compound has a fixed composition, while a mixture does not.

Q9: Which separation technique is used to purify seawater to obtain salt?

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Ans: Evaporation.

Q10: What type of mixture is muddy water?

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Ans: Suspension.

Q11: Which technique is used to separate blood components in laboratories?

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Ans: Centrifugation.

Q12: What is the Tyndall effect?

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Ans: Scattering of light by colloidal particles.

Q13: Which element is most abundant in the Earth's crust?

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Ans: Oxygen.

Q14: What is the major component of stainless steel?

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Ans: Iron, chromium, and nickel.

Q15: Why does dry ice directly convert into gas?

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Ans: It sublimates at atmospheric pressure.

Q16: What is the reason behind the hardness of diamond?

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Ans: Strong covalent bonding between carbon atoms.

Q17: What is the charge of a neutron?

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Ans: Neutral (0 charge).

Q18: Which law governs the filling of orbitals in increasing order of energy?

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Ans: Aufbau principle.

Q19: Why do noble gases not react easily?

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Ans: They have a stable electronic configuration.

Q20: What is the general formula for alkanes?

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Ans: C_nH₂n+2.

Fill in the Blanks

Q1: The process of converting a gas directly into a solid is called _______.

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Ans: deposition

Q2: Elements with the same atomic number but different mass numbers are called  _______.

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Ans: isotopes

Q3: The property of metals that allows them to be drawn into wires is called  _______.

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Ans: ductility

Q4: The energy required to convert 1 kg of liquid into gas at its boiling point is called  ___________________.

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Ans: latent heat of vaporization

Q5: The process of protecting iron from rusting by coating it with zinc is called  _______.

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Ans: galvanization

Statement-Based Questions

Q1: Statement: All compounds are pure substances, but not all pure substances are compounds.

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Ans: True. (Pure substances also include elements.)

Q2: Statement: Solids expand more than gases when heated.

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Ans: False. (Gases expand the most due to weak intermolecular forces.)

Q3: Statement: A solution of sugar in water is a heterogeneous mixture.

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Ans: False. (It is a homogeneous mixture.)

Q4: Statement: Diamond and graphite are allotropes of carbon but have different physical properties.

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Ans: True. (They have different crystal structures.)

Q5: Statement: The boiling point of water is always 100°C under all conditions.

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Ans: False. (It varies with pressure.)

Problem-Based Questions

Q1: A gas is compressed and cooled, which causes it to change its state. What process is occurring?

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Ans: Liquefaction (gas to liquid).

Q2: An unknown substance was heated. It turned into a gas without forming a liquid. What can you conclude?

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Ans: The substance undergoes sublimation (e.g., dry ice or naphthalene).

Q3: A student adds iron filings to copper sulfate solution. After some time, a reddish-brown deposit is observed. What type of reaction is this?

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Ans: Displacement reaction (Iron displaces copper: Fe + CuSO4 → FeSO4 + Cu).

Q4: A sample of a compound is found to contain only hydrogen and carbon. What type of compound is it?

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Ans: Hydrocarbon.

Q5: A solid was placed in a beaker of water and started dissolving immediately without stirring. What can you infer about the solid’s nature?

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Ans: It is highly soluble in water (e.g., salt or sugar).