Student Questions

Showing: Class 9 (1030 questions)

• by GIANSH GUPTA KHUNDKER · Class 9

  He ________ have taken the keys by mistake; they look identical to his.A) mustB) shouldC) mightD) can

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• by GIANSH GUPTA KHUNDKER · Class 9

  The captain, along with his crew members, ________ drowned during the storm.A) wereB) wasC) areD) have been

  English Tenses thumb_up 0 people 1 answers check_circle 0%
• by GIANSH GUPTA KHUNDKER · Class 9

  By the time the police arrived, the thief ________ into the crowd.A) vanishedB) had vanishedC) was vanishingD) has vanished

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• by GIANSH GUPTA KHUNDKER · Class 9

  According to Kepler’s First Law, what is the shape of the orbit of a planet revolving around the Sun? A) A perfect circleB) An ellipseC) A straight lineD) A parabola

  Science Gravitation thumb_up 0 people 0 answers check_circle 0%
• by GIANSH GUPTA KHUNDKER · Class 9

  The gravitational force between two identical bodies is F. If a thick brick wall is placed completely between them, the gravitational force will: A) Decrease significantly.B) Increase significantly.C) Become zero.D) Remain exactly F.

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• by GIANSH GUPTA KHUNDKER · Class 9

  What is the weight of an object when it is taken to the exact center of the Earth? A) It remains equal to its weight on the surface.B) It becomes infinite.C) It becomes zero.D) It drops to exactly half of its surface weight.

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• by GIANSH GUPTA KHUNDKER · Class 9

  The acceleration due to gravity (g) experienced by a freely falling object: A) Depends entirely on the mass of the falling object.B) Is directly proportional to the size of the falling object.C) Is completely independent of the mass of the falling object.D) Decreases continuously as the object gets closer to Earth.

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• by GIANSH GUPTA KHUNDKER · Class 9

  A feather and an iron nail are dropped from the same height inside a vacuum chamber. Which statement is true? A) The iron nail hits the ground first.B) The feather hits the ground first.C) Both hit the ground at exactly the same time.D) The feather floats and never reaches the ground.

  Science Gravitation thumb_up 0 people 1 answers check_circle 100%
• by GIANSH GUPTA KHUNDKER · Class 9

  An object is taken from the Earth to the Moon. In this process:A) Both its mass and weight change.B) Its mass changes but its weight remains the same.C) Its mass remains the same but its weight changes.D) Neither its mass nor its weight changes.

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• by GIANSH GUPTA KHUNDKER · Class 9

  Why do school bags have wide straps?A) To decrease the total weight of the bag.B) To increase the pressure exerted on the shoulder.C) To decrease the pressure exerted on the shoulder.D) To make the bag look more attractive.

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• by GIANSH GUPTA KHUNDKER · Class 9

  An object will float on the surface of a liquid if:A) Its density is greater than the density of the liquid.B) Its density is less than or equal to the density of the liquid.C) Its mass is greater than the mass of the liquid displaced.D) The buoyant force acting on it is zero.

  Science Matter in Our Surroundings thumb_up 0 people 0 answers check_circle 0%
• by GIANSH GUPTA KHUNDKER · Class 9

  In Rutherford’s gold foil experiment, why did a tiny fraction of alpha particles rebound back by 180 degrees? A) Because the atom is completely solid throughout. B) Because electrons exert a massive repulsive force. C) Because the positive charge and mass are concentrated in a tiny central nucleus. D) Because alpha particles are highly attracted to gold atoms.

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• by GIANSH GUPTA KHUNDKER · Class 9

  Which of the following conditions will drastically speed up the rate of evaporation of a liquid?A) Decrease in surface area, increase in humidity.B) Increase in surface area, increase in wind speed.C) Decrease in temperature, increase in wind speed.D) Increase in humidity, increase in temperature.

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• by GIANSH GUPTA KHUNDKER · Class 9

  Which of the following phenomena always results in a cooling effect?A) CondensationB) EvaporationC) SublimationD) Fusion

  Science Structure of Atom thumb_up 0 people 0 answers check_circle 0%
• by GIANSH GUPTA KHUNDKER · Class 9

  Which of the following statements correctly defines a pair of isotopes?A) Atoms with the same mass number but different atomic numbers.B) Atoms with the same atomic number but different mass numbers.C) Atoms with the same number of neutrons but different protons.D) Atoms with identical physical properties but different chemical reactions.

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• by GIANSH GUPTA KHUNDKER · Class 9

  Which subatomic particle was discovered by J.J. Thomson using the cathode ray tube experiment?A) ProtonB) NeutronC) ElectronD) Alpha particle

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• by GIANSH GUPTA KHUNDKER · Class 9

  Which range of frequencies represents the average audible range for a healthy human ear? A) 0 Hz to 20 Hz B) 20 Hz to 20,000 Hz C) 20,000 Hz to 50,000 Hz D) 200 Hz to 2,000 Hz

  Science Sound thumb_up 0 people 1 answers check_circle 100%
• by GIANSH GUPTA KHUNDKER · Class 9

  Through which of the following media can sound waves travel at the highest speed? A) Vacuum B) Water C) Air D) Steel

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• by GIANSH GUPTA KHUNDKER · Class 9

  To make an embedded background video play automatically and continuously without stopping, which combination of boolean attributes must be added to the <video> tag? A) autoplay loop B) start repeat C) play continuous D) auto replay

  Cyber HTML Multimedia thumb_up 0 people 0 answers check_circle 0%
• by GIANSH GUPTA KHUNDKER · Class 9

  Which attribute is used within a <source> tag to specify the media type (MIME type) of the linked file? A) src B) type C) media D) format

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