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Q1.The amount of light entering the eye is controlled by, (a) Eye lens (b) Cornea (c) Iris (d)Cillery muscles, , Q2.Plant cell do not have, (a) Cell wall (b)Plastid (c) Cell membrane (d) Centrosome, Q3.Ozone layer is found right above the_., , (a) Africa (b) Asia (c) Antarctica (d) Australia, , Q4.The planet that has minimum time period of rotation is__, (a) Earth (b) Mercury (c) Venus (d) Jupiter, , Q5.Best known scale for measuring magnitude of an earthquake is(a) Richter scale (b) Electroscope (c)Seismograph (d) None, Q6.Rolling friction is than the sliding friction, , (a) More (b) Less (c) Equal (d) None, , Q7.The image of the an object is always formed atthe ___, , (a) Iris (b) Retina (c) Pupil (d) Lens, , Q8.Which of the following is bad conductor of electricity?, , (a) Sea water (b) lemon juice (c) Distilled water (d) Tap water, Q9.The only non metal which is good conductor of Electricity is., (a) Mercury (b) Graphite (c) Bromine (d) Gold, , Q10.Myopic eye can be corrected by using spectacles with a____ lens., (a) Concave (b) Convex (c) Plane (d) None, , Q11.Weak points on the earth crust are called, , (a) Epicenter (b) Focus (c)Faults (d)Waves, , Q12.The S.I. unit of frequency is, (a) Second (b) Hertz (c) Meter (d) coulomb, , Q13.Metals reacts with oxygen to form_., , (a) Basic oxides (b) Acidic oxides(c) Neutral oxides (d) None, Q14.Sound is produced by a objet., , (a) Vibrating (b) Still (c) Stationary (d) Moving, , Q15.Which of following is/are a non contact force(s)?, , (a) Magnetic (b) Electrostatic (c) Gravitational (d) All of these, Q16.In medium sound travel the fastest, (a) Liquid (b) Solid (c) Gaseous (d) Vacuum, , Q17.A push or pull on an object is called ‘, , (a) Force (b) Friction (c) Pressure (d) Drag, , Q18.An uncharged objects can be charged by ___, , (a) Friction (b) Conduction (c) Induction (d) All of these, Q19.Ray of light that send back after reflection by mirrors are called, (a) Incident ray (b) Normal (c) Reflected ray (d) Light ray, Q20.Iron Objects are generally electroplated with to, prevent them for rusting., , (a) Lead (b) Sodium (c) Chromium (d) Mercury