Dr. AS Rao STSE Talent Search Exam Model Questions
1) A person of height 2 m standing under a street lamp of height 6 m above the ground starts running with a constant speed of 5 ms-1 in a straight line. The light from the lamp falling on the person casts the shadow of the person. Then A) The distance covered by the person in 2 s is 10 m B) The distance covered by the shadow of the person in 2 s is 15 m. C) The velocity of the shadow is 7.5 ms-1 D) The velocity of the shadow is 5.0 ms-1
2) Two block of masses 2 kg and 3 kg are attached to the ends of an inextensible and mass less string. The string runs over a pulley which is fixed to a rigid support (g = 10ms-2) A) Acceleration of the system of 2 kg and 3 kg blocks is 2 ms2 B) Acceleration of the system of 2 kg and 3 kg blocks is 5 ms2 C) Acceleration of the system of 2 kg and 3 kg blocks is 3.3 ms2 D) Tension in the string is 24 N.
3) Which one of the following statements is correct regarding diffusion? A) Diffusion of solids is faster than that of gases B) Carbon dioxide diffuses from blood into lungs C) Oxygen diffuses from blood into lungs D) Diffusion of gases is higher than that of liquids
4) The rate of evaporation will be increased with A) increase in temperature B) decrease in surface area C) Increase in wind speed D) decrease in humidity
5) Identify the correct statements: A) Churning of milk separates out cream B) Mixtures are always homogeneous C) Churning makes cream to settle to the bottom D) Heavier particles settle to the bottom on centrifugation
6) In which of the following colloid type the dispersed phase is solid? A) Emulsion B) sol C) gel D) aerosol
7) The postulates of Dalton’s Atomic theory are: A) Matter consists of indivisible particles called Atoms B) Atoms of an element have different masses C) Atoms of different combine to gibe compounds D) Atoms are neither created nor destroyed in a chemical reaction
8).Skeletal muscle is A) Non – striated muscle B) Striated muscle C) Voluntary muscle D) Involuntary muscle.
9).Which of the following groups include only mammals? A) Bat, Dolphin, Monkey B) Kangaroo, Man, Bat C) Parrot, Bat, Dolphin D) Man, Dolphin, Pigeon
10) Open circulatory system is present in A) Earthworm B) Cockroach C) Leech D) Housefly
11). Which are the features of annelids? A) Bilaterally symmetrical B) Triploblastic C) True body cavity D) Pseudocoelom
12). Land pollution is mainly caused by A) Industrial waste B) Reforesting C) Pyrolysis D) Mixed cropping
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