FORMATIVE GRADE 8 SEM-1, 2017-18
Quiz by Amir Khan
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20 questions
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- Q15 joule= _________cal4.20.241.22.245s
- Q2Identify the correct energy conversion from the following?Heat energy is transferred from stirrer to hot soupAn ice cube loses heat energy to a hot cup of tea as it meltsHeat energy from the refrigerator is transferred to a hot pie in the refrigerator.Heat energy from a hot drink is transferred to cold hands.45s
- Q3Substance A has a higher specific heat capacity than substance B.? If both have equal mass then which of the two would require more heat energy for the same rise in temperature.Substance B.Both require the same amount of heat.Answer depends on the density of each substance.Substance A45s
- Q4On heating a kettle of water on a stove, the hot water at the bottom of the kettle begins to rise and the cooler water at the top will sink to the bottom. This is an example of:RadiationAll the aboveConvectionConduction45s
- Q5Which is true regarding solids?They are compressibleThe molecules move freely within the solidThe intermolecular force of attraction is strongThe intermolecular space is large45s
- Q6The heat gained or lost by a body during a change of state is the product of its _______ and the specific latent heat.Change in temperatureMassWeightVolume45s
- Q7Which among the following is INCORRECT regarding the use of detergent washing clothes?It is added to decrease adhesive force between water and clothIt is added to decrease cohesive force between water moleculesIt is added to decrease surface tensionIt is added to increase adhesive force between water and cloth45s
- Q8The force of attraction between two like molecules is called as______electrostatic forcecohesive forcegravitational forceadhesive force45s
- Q9Ray of light is incident obliquely at the water-air interface, then the refracted ray will _____Bend towards the normalTravels along the normalBe parallel to normalBend away from the normal45s
- Q10When a glass prism causes dispersion of white light, the colour deviated least is ________VioletGreenRedYellow45s
- Q11The band of seven colors obtained due to dispersion of white light is called as______Colour banddispersed bandSpectrumNewton's band.45s
- Q12The angle through which a ray of light turns on passing through a prism is called ________Angle of deviation.Angle of reflectionAngle of incidenceAngle of emergence45s
- Q13Rainbow is an example of which of the following phenomena of light?refractionLateral inversiondispersionreflection45s
- Q14If the angle of incidence is 0 degree then angle of refraction will be______?45 degree0 degree90 degree60 degree45s
- Q15Identify the type of lens in the image that follows?bi-concavebi-convexconcavo-convexconvexo-concave45s
