Class 10 – Science Extra Questions – Ch. 2 – Acids Bases and Salts Q. 1 A substance with a pH of 2 is likely to be _______. A) acidic B) alkaline C) neutral D) soapy Q. 2 When a strong acid is diluted with pure water, what happens to the pH of the resulting […]
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Class 10 – Science Extra Questions – Ch. 1 – Chemical Reactions and Equations Q. 1 What is the chemical formula of water, which is electrolyzed to produce hydrogen and oxygen gas? A) H2O2 B) H2O C) HO D) H3O Q. 2 Which of the following chemical reactions represents a decomposition reaction? A) 2H₂ +
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Class 9 – Science Extra Questions – Ch. 12 – Improvement in Food Resources Q. 1 What is the term for a fishery that utilizes saltwater environments? A) inland fishery B) marine fishery C) river water fishery D) None of these Q. 2 What is the classification of DDT A) a non-biodegradable pollutant B) a
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Class 9 – Science Extra Questions – Ch. 11 – Sound Q. 1 What is the speed of a super-sonic aircraft in relation to the speed of sound A) below speed of sound B) equal to speed of sound C) more than speed of sound D) equal to speed of light. Q. 2 Two sound
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Class 9 – Science Extra Questions – Ch. 10 – Work and Energy Q. 1 What form of energy is present in water held back by a dam? A) no energy B) electrical energy C) kinetic energy D) potential energy Q. 2 What is the SI unit of work A) Newton B) meter C) newton-meter
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Class 9 – Science Extra Questions – Ch. 9 – Gravitation Q. 1 When a ship made of steel floats on water, it is an example of which scientific principle? A) Friction B) Gravity C) Inertia D) Buoyancy Q. 2 A projectile is launched vertically upwards and reaches its peak height in 3 seconds. What
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Class 9 – Science Extra Questions – Ch. 8 – Force and Laws of Motion Q. 1 What is the definition of fluids? A) solids and liquids B) liquids and gases C) solids and gases D) only liquids Q. 2 What is the magnitude of the buoyant force experienced by an object? A) mass of
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Class 9 – Science Extra Questions – Ch. 7 – Motion Q. 1 A person walks 5 meters east and then 5 meters west. What is the total distance traveled by the person? A) 0 meters B) 5 meters C) 10 meters D) The distance cannot be determined Q. 2 The distances covered by a
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Class 9 – Science Extra Questions – Ch. 6 – Tissues Q. 1 Which of the following tissues contains proteins responsible for contraction? A) bones B) blood C) muscles D) cartilage Q. 2 What are the cellular components that make up phloem tissue? A) sieve tubes B) companion cells C) both of these D) none
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Class 9 – Science Extra Questions – Ch. 5 – The Fundamental Unit of Life Q. 1 What molecule serves as the cell’s primary energy-carrying unit? A) mitochondria B) ATP C) FAD D) glucose Q. 2 Which of these organisms has a shape that changes or is not fixed? A) Euglena B) Paramecium C) Amoeba
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