NCERT Exemplar Problems Class 7 Science – Physical and Chemical Changes Question 1: Which one of the following is a physical change? (a) Rusting of iron (b) Combustion of magnesium ribbon (c) Burning of candle (d) Melting of wax Answer: (d) Rusting, combustion and burning involve chemical changes. Melting of wax is a physical change.…
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NCERT Exemplar Problems Class 7 Science – Acids, Bases and Salts Question 1: The correct way of making a solution of acid in water is to (a) add water to acid (b) add acid to water (c) mix acid and water simultaneously (d) add water to acid in a shallow container Answer: (b) Making solution…
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NCERT Exemplar Problems Class 7 Science – Heat Question 1: A marble tile would feel cold as compared to a wooden tile on a winter morning because the marble tile (a) is a better conductor of heat than the wooden tile (b) is polished while wooden tile is not polished (c) reflects more heat than…
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NCERT Exemplar Problems Class 7 Science – Fibre to Fabric Question 1: The rearing of silkworms for obtaining silk is called (a) cocoon (b) silk (c) sericulture . (d) silviculture Answer: (c) Sericulture is a practice of rearing silkworms for obtaining silk while silviculture is a practice of developing and caring forests Question 2: Which…
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NCERT Exemplar Problems Class 7 Science – Nutrition in Animals Question 1: Given below from (i) to (iv) are some food items. (i) Boiled and mashed potato (ii) Glucose solution (iii) A slice of bread (iv) Mustard oil Which of the above will give blue-black colour when tested with iodine? (a) (i) and (ii) (b)…
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NCERT Exemplar Problems Class 7 Science – Nutrition in Plants Question 1: Organisms which prepare food for themselves using simple naturally available raw materials are referred to as (a) heterotrophs (b) autotrophs (c) parasites (d) saprophytes Answer: (b) Autotrophs are organisms that make food themselves from simple substances like water, C02 in the presence of…
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NCERT Exemplar Problems Class 8 Science The Department of Education in Science & Mathematics (DESM) & National Council of Educational Research & Training (NCERT) developed Exemplar Problems in Science and Mathematics for Upper Primary Stage, Secondary and Senior Secondary Classes with the objective to provide the students a large number of quality problems in various…
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NCERT Exemplar Problems Class 8 Science Chapter 18 Pollution of Air and Water Question1 Air is a mixture of various gases. One of the gas is 21% part of the air and is essential for the survival of human beings. This gas is (a) nitrogen (b) oxygen (c) ozone (d) argon Answer. (b) Oxygen makes…
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NCERT Exemplar Problems Class 8 Science Chapter 17 Stars and the Solars System Question1 Morning star is the name given to (a) Pole star (b) star Sirius (c) planet Jupiter (d) planet Venus Answer. (d) Morning star is the name given to the planet Venus because sometimes it appears in the eastern sky before sunrise.…
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NCERT Exemplar Problems Class 8 Science Chapter 16 Light Question 1 Part of the eye which controls the entering of light is called (a) iris (b) cornea (c) lens (d) retina Answer. (a) Iris is a dark muscular structure behind the cornea, which controls the amount of light entering into the eye. Question 2 We…
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