MCQ
matter-states-and-changes-l2 MCQ - Practice Questions with Answers
Solve 30 matter-states-and-changes-l2 questions for RAS/RPSC preparation.
Practice questions
Q1Match each event with the correct type of change. I. Ice melts in a glass. II. Iron nail rusts. III. Camphor kept in the open slowly disappears.
Ice melting is solid to liquid, so it is melting. Rusting of iron is a chemical change, while camphor disappearing in open air is a common example of sublimation because the solid changes directly to vapour.
Q2Match the material with the most suitable school-level separation method: sand water, salt water, oil water, iron filings with sand.
The final match-list item checks whether Devika’s group links method to property. Sand water is filtered, salt is recovered by evaporation, oil-water layers can be decanted, and iron filings respond to a magnet. The answer is practical, not merely verbal.
Q3Which statement about solutions and mixtures is incorrect?
Every solution is a mixture, but every mixture is not a solution. Sand in water is a mixture, yet it is not uniform throughout, so the broad statement about all mixtures fails.
Q4A teacher dissolves a spoon of salt completely in a glass of water and asks students to classify the result. Which classification is scientifically correct?
Salt water is a solution when the salt is distributed uniformly through the water. It is still a mixture, and the salt has not changed into water or settled as visible grains.
Q5Assertion: Tearing a sheet of paper into small pieces is usually a physical change. Reason: The paper changes in size and form, but no new substance is usually formed. Which option is correct?
Tearing paper changes its size and form, but it does not usually make a new substance. Irreversibility or difficulty of joining the pieces back is not enough evidence for a chemical change.
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More questions
6Which property best separates a gas from a liquid in a simple particle model?
7Assertion: Every solution is a mixture. Reason: A solution contains a solute spread uniformly in a solvent. Choose the correct option.
8Which statement set is fully correct for physical and chemical changes?
9Which pair contains only chemical changes?
10Which observation is the best evidence that cutting a sheet of paper into small pieces is a physical change?
11How many of the following are chemical changes? I. Burning of paper II. Setting of curd III. Dissolving salt in water IV. Tearing paper into pieces
12Meena has four cups: salt water, sand water, oil water and iron filings with sand. Which statement is correct?
13A teacher asks learners to decide whether curd setting from milk is a chemical change. Which evidence is most appropriate?
14Assertion: Salt water is a solution. Reason: In salt water, salt is spread evenly throughout the water.
15Assertion: Evaporation can occur below boiling conditions. Reason: Evaporation takes place from the surface of a liquid. Choose the correct option.