Q.1.The correct IUPAC name for compound 1, 3-di-isopropyl propane-3-ol is : [A] 2, 6-Dimethylheptan-5-ol [B] 2, 6-Dimethylheptan-3-ol [C] 3-Hydroxy-2, 6-dimethylheptane [D] 1, 1, 6, 6-Tetramethylhexan-2-ol Q.2.A solid sphere rolls without slipping on a rough horizontal floor, moving with a speed v. It makes an elastic collision with a smooth vertical wall. After impact, [A] it will move with a speed v initially [B] its motion will be rolling without slipping [C] its motion will be rolling with slipping initially and its rotational motion will stop momentarily at some instant [D] its motion will be rolling without slipping only after some time Q.3.An electron is continuously accelerated in vacuum tube by applying potential difference. If the de-Broglies wave length is decreased by 10% the change in the kinetic energy of electron is nearly : [A] decreased by 11% [B] increased by 23.4% [C] increased by 10% [D] increased by 11.1% Q.4.The penetration power of beta particles is 1. Then the relative penetration power of gamma rays is... a) 1 b) 100 c) 1/1000 d) 1000 Q.5.Position of the centre of mass of a rigid body depends on... a) its shape only b) distribution of its matter only c) both its shape and distribution of matter d) its position relative to the earth. Q.6. The buoyancy depends on a) the depth to which the body is immersed b) the shape of the body c) the mass of the body d) the mass of the liquid displaced Q.7.The sound waves that propagate in a metal bar may be... a) longitudinal b) transverse c) torsional d) either longitudinal or transverse Q.8. When a sphere rolls without slipping the ratio of translational kinetic energy to total kinetic energy is... a) 3 : 7 b) 1 : 1 c) 7 : 5 d) 5 : 7 Q.9.A body weighs 50 grams in air and 40 grams in water. How much would it weigh in a liquid of specific gravity 1.5? (A) 30 grams (B) 35 grams (C) 65 grams (D) 45 grams Q.10.Two strings of the same material and the same area of cross - section are used in sonometer experiment. One is loaded with 12kg and the other with 3kg. The fundamental frequency of the first string is equal to the first overtone of the second string. If the length of the second string is 100cm, then the length of the first string is 1) 300cm 2) 200cm 3) 100cm 4) 50cm
Posted on: Tue, 15 Oct 2013 04:21:09 +0000
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