The Tamil Nadu Chief Minister’s Talent Search Examination (TNCMTSE) is a state-level scholarship exam for meritorious Class 10 government school students, conducted by Tamilnadu Directorate of Government Examination [DGE], Chennai. The exam covers Mathematics, Science, and Social Science based on Classes 9 and 10 state board syllabus.
Physics: 1. The units of mass, length and time are kilogram (kg), metre (m) and second (s), respectively. In terms of these, the unit of surface tension is A) kg m/s² B) kg m/s C) kg/s² D) kg/ms
2. A stone of mass 3 kg is dropped from rest from a height h above the ground. Air resistance may be neglected, and the acceleration due to gravity is g = 9.8 m/s².When the stone is at a height h above the ground, its kinetic energy is 784 J. The height h is equal to A) 48 m B) 80 m C) 96 m D) 128 m
3. A length of wire has a resistance R. The wire is cut into 10 equal lengths. When all 10 pieces are connected in parallel, the effective resistance is r. The ratio r/R is equal to. A) 1/100 B) 1/ 81 C) 1/121 D) 81/121
4. An object is placed at a distance 2f from a concave mirror of focal length f. Its image is A) virtual, at a distance ƒ from the mirror B) real, at a distance 2f from the mirror C) real, at a distance less than f from the mirror D) virtual, at a distance greater than 2f from the mirror.
5. A heater coil with a resistance of 3.5 k2 carrying a steady current is immersed in 20 kg of water. The heater raises the temperature of the water from 30° C to 80° C in 5 minutes. Given that the specific heat capacity of water is 4200 J/kg/K, the current in the heater coil is (A) 1A (B) 2A (C) ЗА (D) 4A
Chemistry: 1. The reaction in which heat energy is supplied to complete the reaction is known as A) Exothermic Reaction B) Electrolytic Decomposition C) Displacement Reaction D) Endothermic Reaction
2. A solution of 0.5 millimole of barium chloride, when mixed with excess of silver nitrate solution, results in an insoluble white substance which is precipitated. The type of chemical reaction and the amount of the substance formed are A) Double displacement reaction- 1 milli mole B) Single displacement reaction -2 milli mole C) Single displacement reaction -3 milli mole D) Double displacement reaction – 0.5 milli mole
3. Pain caused by indigestion in the stomach is mainly due to A) Sodium hydroxide B) Sulphuric acid C) Magnesium Hydroxid D) Hydrochloric acid
4. Four reactions are given below. The reaction which is balanced and identified with the correct name is A) Mg+CI MgCl; Combustion Reaction B) HgO+ Heat Hg+O; Oxidation Reaction C Na+S Na2 S; Reduction Reaction D) CaO+SiO₂ CaSiO3 Combination Reaction
5. Among the four reactions given below the one which is balanced and identified correctly by the phrase next to it is A) CH,+O₂ CO2 +H20; Law of nature B) CH4+2O2 CO:+2 HO; Law of conservation of Matter C) CH4+ 0₂ -2 CO2+ H2O; Law of conservation of gases D) 2 CH4 + О₂ → CO₂ + H₂O2; Reduction of methane
