3Specific heat capacity is defined as:aHeat required to change 1 g of substance by 1 KbHeat required to change 1 kg of substance by 1 KcHeat required to convert solid into liquiddHeat required to boil 1 kg of liquidShow answer
5A 200 g metal sample absorbs 3500 J when its temperature rises by 50 °C. Its specific heat is:a350 J/kg Kb700 J/kg Kc500 J/kg Kd3500 J/kg KShow answer
6Metals feel colder than wood at the same temperature because:aMetals have low densitybMetals have high conductivitycMetals are good radiatorsdMetals absorb heat fasterShow answer
8The method used to determine specific heat capacity of solids is:aExpansion methodbMethod of mixturescDistillation methoddSublimation methodShow answer
9Which instrument is essential in electrical heating method?aThermostatbAmmeter and voltmetercHygrometerdAnemometerShow answer
10Heat gained by water and calorimeter is equal to:aHeat lost by solidbHeat gained by solidcHeat lost by waterdHeat gained by thermometerShow answer
11In Karachi, summer and winter temperature difference is less due to:aDesert climatebHigh rainfallcLarge specific heat of waterdMountains nearbyShow answer
14Human body temperature is regulated due to:aHigh conductivity of waterbHigh specific heat of watercLow density of waterdExpansion of bloodShow answer
15In method of mixtures, principle involved is:aPrinciple of expansionbPrinciple of buoyancycConservation of energydThermal conductionShow answer
18Why is water used in radiator of automobile as coolant?aIt has easily availablebIt is low cost or freecIt has large specific heatdIt has oxygenShow answer
19Which of the following situation is the best example of conduction?aA metal spoon becomes hot when placed in boiling waterbWarm air rising near a heatercSunlight warming the surface or the earthdA microwave over heating foodShow answer
20Which combination of heat transfer methods would be dominant what you placed your hand near, but not touching, a fire?aConduction and radiationbConvection and conductioncRadiation and convectiondConduction and insulationShow answer
