[{"id":123529,"question":"The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become","choices":[{"text":"7.20 N","value":"A"},{"text":"11.25 N","value":"B"},{"text":"22.50 N","value":"C"},{"text":"45.00","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":123346,"question":"A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be","choices":[{"text":"1/2","value":"A"},{"text":"More than 1/2","value":"B"},{"text":"Less than 1/2","value":"C"},{"text":"Between 1 and 2","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":123344,"question":"First law of thermodynamics is consequence of conservation of","choices":[{"text":"Work","value":"A"},{"text":"Energy","value":"B"},{"text":"Heat","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":123343,"question":"At what temperature the adiabatic change is equivalent to the isothermal change?","choices":[{"text":"Zero degree Celsius","value":"A"},{"text":"Zero Kelvin","value":"B"},{"text":"Critical temperature","value":"C"},{"text":"Above critical temperature","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":123341,"question":"First law of thermodynamic is special case of","choices":[{"text":"Law of conservation of energy","value":"A"},{"text":"Charle's law","value":"B"},{"text":"Law of conservation of mass","value":"C"},{"text":"Boyle's law","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":123339,"question":"Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure","choices":[{"text":"A greater than than of B","value":"A"},{"text":"A is equal to that of B","value":"B"},{"text":"A is less than that of B","value":"C"},{"text":"A is twice the pressure of B","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":123337,"question":"Rice takes longest to cook","choices":[{"text":"In a submarine 100 m below the surface of the sea","value":"A"},{"text":"At sea level","value":"B"},{"text":"At Murree","value":"C"},{"text":"At Mount Everest","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":123335,"question":"Melting point of ice","choices":[{"text":"Increases with increasing pressure","value":"A"},{"text":"Decreases with increasing pressure","value":"B"},{"text":"Is independent of pressure","value":"C"},{"text":"Is proportional to pressure","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":123333,"question":"An amount of water of mass 20 g at 0<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C is mixed with 40 g of water at 10</span><span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C. Final temperature of mixture is</span>","choices":[{"text":"-20<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"A"},{"text":"6.67<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"B"},{"text":"5<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"C"},{"text":"0<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":123332,"question":"Specific heat at constant pressure is greater than the specific heat at constant volume because","choices":[{"text":"Heat is used up to increase temperature at constant pressure","value":"A"},{"text":"Heat is used by gas for expansions purposes at constant pressure","value":"B"},{"text":"Heat is use dup to increase internal energy","value":"C"},{"text":"The above statement is invalid","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":123331,"question":"If water in a closed bottle is taken up to the moon and opened, the water gets","choices":[{"text":"Freeze","value":"A"},{"text":"Boiled","value":"B"},{"text":"Dissociated into O<sub>2</sub>and H<sub>2</sub>","value":"C"},{"text":"Evaporated","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":123329,"question":"What temperature is the same on Celsius scale as well as on Fahrenheit scale?","choices":[{"text":"32<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"A"},{"text":"-32<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"B"},{"text":"-40<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"C"},{"text":"-212<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":123327,"question":"Amount of heat required to raise the temperature of a body through 1 K is called its","choices":[{"text":"Specific heat","value":"A"},{"text":"Water equivalent","value":"B"},{"text":"Thermal capacity","value":"C"},{"text":"Entropy","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":123326,"question":"Good absorbers of heat are","choices":[{"text":"Poor emitters","value":"A"},{"text":"Non emitters","value":"B"},{"text":"Good emitters","value":"C"},{"text":"Highly polarized","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":123325,"question":"On a cold morning a metal surface will fell colder to touch than a wooden surface, because","choices":[{"text":"Metal has high specific heat","value":"A"},{"text":"Metal has high thermal conductivity","value":"B"},{"text":"Metal has low specific heat","value":"C"},{"text":"Metal has low thermal conductivity","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":123324,"question":"Heat travels through vacuum by","choices":[{"text":"Conduction","value":"A"},{"text":"Convection","value":"B"},{"text":"Radiation","value":"C"},{"text":"Both A and B","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":123323,"question":"For making cooking utensils, which of the following pairs of properties is most suited?","choices":[{"text":"Low specific heat and high conductivity","value":"A"},{"text":"Low specific heat and low conductivity","value":"B"},{"text":"High specific heat and high conductivity","value":"C"},{"text":"High specific heat and low conductivity","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":123322,"question":"If a liquid is heated in weightlessness, the heat is transmitted through","choices":[{"text":"Conduction","value":"A"},{"text":"Convection","value":"B"},{"text":"Radiation","value":"C"},{"text":"Neither, because the liquid cannot be heated in weightlessness","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":123321,"question":"The coefficient of linear expansion of iron is 0.000011 per<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°K. An iron rod is 10 metre long at 27</span><span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to</span>","choices":[{"text":"0<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"A"},{"text":"10<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"B"},{"text":"17<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"C"},{"text":"20<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":123320,"question":"Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is","choices":[{"text":"1 : 2","value":"A"},{"text":"2 : 3","value":"B"},{"text":"3 : 4","value":"C"},{"text":"8 : 9","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":123319,"question":"The length of a metallic rod is 5 meter at 100<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C. The coefficient of cubical expansion of the metal will be</span>","choices":[{"text":"2.0 x 10<sup>-5</sup>/<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"A"},{"text":"4.0x10<sup>-5</sup>/<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"B"},{"text":"6.0x10<sup>-5</sup>/<span style=\"font-family: arial, sans-serif; font-size: small; color: rgb(84, 84, 84);\">°C</span>","value":"C"},{"text":"2.33x10<sup>-5</sup>/<span style=\"font-family: arial, sans-serif; font-size: small; color: rgb(84, 84, 84);\">°C</span>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":123316,"question":"Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be","choices":[{"text":"R/2","value":"A"},{"text":"P","value":"B"},{"text":"2P","value":"C"},{"text":"Depending on the relative mass of the gases","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":123314,"question":"The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :<br>","choices":[{"text":"1.7 x 10<sup>3</sup>J","value":"A"},{"text":"10.2 x 10<sup>3</sup>J","value":"B"},{"text":"3..4 x 10<sup>3</sup>J","value":"C"},{"text":"6.8 x 10<sup>3</sup>J","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":123312,"question":"At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be","choices":[{"text":"81 K","value":"A"},{"text":"355 K","value":"B"},{"text":"627 K","value":"C"},{"text":"627<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":123311,"question":"On colliding in a closed container, the gas molecules","choices":[{"text":"Transfer momentum to the walls","value":"A"},{"text":"Momentum becomes zero","value":"B"},{"text":"Move in opposite directions","value":"C"},{"text":"Perform Brownian motion","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":123310,"question":"At absolute temperature, the kinetic energy of the molecules","choices":[{"text":"Becomes zero","value":"A"},{"text":"Becomes maximum","value":"B"},{"text":"Becomes minimum","value":"C"},{"text":"Remain constant","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":123309,"question":"Pressure exerted by a gas is","choices":[{"text":"Independent of density of the gas","value":"A"},{"text":"Inversely proportional to the density of the gas","value":"B"},{"text":"Directly proportional to the square of the density of the gas","value":"C"},{"text":"Directly proportional to the density of the gas","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":123307,"question":"The temperature of gas is produced by","choices":[{"text":"At potential energy of its molecules","value":"A"},{"text":"The kinetic energy of its molecules","value":"B"},{"text":"The attractive force between its molecules","value":"C"},{"text":"The repulsive force between its molecules","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":123306,"question":"If the volume of the gas is to be increased by 4 times, then","choices":[{"text":"Temperature and pressure must be doubled","value":"A"},{"text":"At constant P the temperature must be increased by 4 times","value":"B"},{"text":"At constant T the pressure must be increased by four times","value":"C"},{"text":"It cannot be increased","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":123305,"question":"A real gas can be approximated to an ideal gas at","choices":[{"text":"Low density","value":"A"},{"text":"High pressure","value":"B"},{"text":"High density","value":"C"},{"text":"Low temperature","value":"D"},{"value":"E"}],"correctAnswer":1}]