Practice Test

Q1) The range of mercury thermometer is Show Answer

Q2) When three identical thermometers marked kelvin, celsius and fahrenheit scale, placed in boiling water, the temperature shown on them respectively are Show Answer

Q3) Ideal gas equation for 'n' number of moles is given by Show Answer

Q4) The numerical value of R is Show Answer

Q5) Point out the CORRECT relation. Show Answer

Q6) Which of the following relation is INCORRECT ? Show Answer

Q7) The water has maximum density at Show Answer

Q8) The SI unit of specific heat is Show Answer

Q9) The relation between molar specific heat, molecular weight and principal specific heat is ( where symbols have their usual meaning) Show Answer

Q10) The unit of latent heat is Show Answer

Q11) The dimensions of thermal conductivity are Show Answer

Q12) C.G.S. unit of coefficient of thermal conductivity is Show Answer

Q13) At what temperature the reading of a Fahrenheit thermometer will be double that of celsius thermometer ? Show Answer

Q14) A constant pressure air thermometer gave a reading of 47.5 units of volume when immersed in ice and 67.0 units when immersed in boiling liquid. The boiling point of liquid is Show Answer

Q15) Matter is made up of Show Answer

Q16) The sum of all energies of all molecules in a body is called as Show Answer

Q17) The thermal energy is also called as Show Answer

Q18) Heat and temperature are Show Answer

Q19) The degree of hotness and coldness of a body is called Show Answer

Q20) Choose the WRONG statement. Show Answer

Q21) There are _____ fixed points of thermometer. Show Answer

Q22) What is the temperatue at which we get the same reading on both celsius and fahrenheit scales ? Show Answer

Q23) At constant temperature, the volume of given mass of a gas is Show Answer

Q24) In constant volume gas thermometer temperature is calibrated in terms of Show Answer

Q25) At absolute zero, every substance in nature has Show Answer

Q26) The thermal capacity of a gas is low as compared to liquids hence Show Answer

Q27) Solids expand on heating because Show Answer

Q28) The solids have definite shape and size because Show Answer

Q29) As the temperature of the solid increases Show Answer

Q30) The unit of superficial expansion is same as Show Answer

Q31) Increase in volume is Show Answer

Q32) When a gas is heated at constant pressure, its volume changes and hence Show Answer

Q33) A system is said to be isolated if Show Answer

Q34) Calorimeter is used to determine _________ of a substance. Show Answer

Q35) The change of state occur when the exchange of heat takes place between Show Answer

Q36) The quantity of heat required to convert unit mass of a substance from its soild state to the liquid state at its melting point without change in its temperature is called as Show Answer

Q37) A mode of transfer of heat through a material medium from a point at higher temperature to a point at lower temperature without actual migration of the particles of the medium is Show Answer

Q38) All metals are Show Answer

Q39) Liquids and gases except mercury are Show Answer

Q40) Which of the following is a slow process ? Show Answer

Q41) The rate of fall of temperature per unit length of the rod, when the rod is in the steady state is known as Show Answer

Q42) The process of transfer of heat due to difference in densities of the matter is called as Show Answer

Q43) When hot water is poured in glass beaker, Show Answer

Q44) Large value of coefficient of thermal conductivity is due to Show Answer

Q45) The quantity of heat which crosses unit area of a metal plate during conduction depends on Show Answer

Q46) During steady state of a rod heated at one end and surrounded by bad conductor, the rate of flow of heat is Show Answer

Q47) Heat is the form of transfer of Show Answer

Q48) Heat transfer takes place between the system and surrounding medium until Show Answer

Q49) In convection, energy is carried by Show Answer

Q50) The motion of the particles of the medium results in ______ currents. Show Answer

Q51) We feel cool near sea shore in day time because of Show Answer

Q52) The result of convection currents in air is Show Answer

Q53) The amount of heat that body can absorb or radiate depends on ______ of the body. Show Answer

Q54) The heat radiated by hot body depends on Show Answer

Q55) One mole of gas occupies a volume of 100 ml at 50 mm pressure. The volume occupied by 3 moles of the same gas at 100 mm pressure and at the same temperature is Show Answer

Q56) Which of the following has minimum coefficient of linear expansion ? Show Answer

Q57) Steel rods are used in RCC roofings because Show Answer

Q58) A solid ball of metal has a spherical cavity inside it. If the ball is heated, then volume of the cavity will Show Answer

Q59) Two iron bars of same length with unequal radii are heated for the same rise in temperature. Then linear expansion will be Show Answer

Q60) Select the WRONG statement. Show Answer

Q61) A constant volume air thermometer works on Show Answer

Q62) A graph is plotted taking the temperature in Fahrenheit along Y-axis and the corresponding temperature in celsius along the X-axis.
Then the graph will be Show Answer

Q63) For a certain gas y = 1.5. Then for this gas Show Answer

Q64) Which is the wrong formula from the following? Show Answer

Q65) A lead bullet moving with velocity v strikes a wall and stops. If 50% of its energy is converted into heat, then what will be the increase in temperature?
(Specific heat of leads is s.) Show Answer

Q66) Two rods of the same material have their diameters in the ratio of 1 : 2 and lengths in the ratio of 2 : 1. The temperature difference between their ends is the same. What is the ratio of the heats conducted by them in a given time? Show Answer

Q67) There are two identical vessels A and B made of different metals, filled with equal amounts of ice. The ice in the vessels A and B melts in 30 and 50 minute respectively. What is the ratio of coefficients of thermal conductivities of A and B? Show Answer

Q68) The ratio of thermal conductivities of two rods of different materials is 5: 4. The two rods of same area of cross- section and same thermal resistance will have the lengths in the ratio Show Answer

Q69) The lengths and radii of two rods made of the same material are in ratios 1 : 2 and 2 : 3 respectively. The temperature difference between the ends of the two rods is kept the same. What is the ratio of the amount of heat flowing per second through them? Show Answer

Q70) Which one of the following circular rods (radius r and length l) each made of the same material and whose ends are maintained at the same temperatures will conduct most heat? Show Answer

Q71) A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amount of heat Q in time t. The metallic rod is melted and the material is formed into a rod of half the radius of the original rod. What is the amount of heat conducted by the new rod when placed in thermal contact with the same two reservoirs in time t? Show Answer

Q72) In which of the following processes, convection of heat does not take place? Show Answer

Q73) Which one of the following processes depends on gravity? Show Answer

Q74) We consider the radiation emitted by the human body. Which one of the following statements is true? Show Answer

Q75) The presence of gravitational field is essential for the heat transfer by Show Answer

Q76) A solid sphere and a hollow sphere of the same material and size are heated to the same temperature and allowed to cool in the same surrounding. If the temperature difference between each sphere and its surrounding is T, then Show Answer